Merge branch 'maint-r14' into dev

Conflicts:
	lib/snmp/doc/src/notes.xml
	lib/snmp/src/agent/snmpa_mpd.erl
	lib/snmp/src/app/snmp.appup.src
	lib/snmp/vsn.mk

25 files changed, 1166 insertions, 457 deletions

diff --git a/lib/snmp/Makefile b/lib/snmp/Makefile
index 20e3d4692a..c55eff04c6 100644
--- a/lib/snmp/Makefile
+++ b/lib/snmp/Makefile
@@ -67,7 +67,7 @@ do_configure: configure
 configure: configure.in
 	autoconf
 
-.PHONY: info
+.PHONY: info gclean
 
 info: 
 	@echo "OS:       $(OS)"
@@ -76,6 +76,9 @@ info:
 	@echo "SNMP_VSN: $(SNMP_VSN)"
 	@echo "APP_VSN:  $(APP_VSN)"
 
+gclean: 
+	git clean -fXd
+
 
 # ----------------------------------------------------
 # Application (source) release targets
diff --git a/lib/snmp/doc/src/Makefile b/lib/snmp/doc/src/Makefile
index 35ed63e103..aa9431477c 100644
--- a/lib/snmp/doc/src/Makefile
+++ b/lib/snmp/doc/src/Makefile
@@ -152,6 +152,7 @@ $(TOP_PDF_FILE): $(XML_FILES)
 pdf: $(TOP_PDF_FILE)
 
 html: gifs $(HTML_REF_MAN_FILE)
+html2: html $(INDEX_TARGET)
 
 clean clean_docs: clean_html clean_man clean_pdf
 	rm -f errs core *~
@@ -228,6 +229,7 @@ clean_man:
 clean_html:
 	@echo "cleaning html:"
 	rm -rf $(HTMLDIR)/*
+	rm -f $(INDEX_TARGET)
 
 $(MAN7DIR)/%.7: $(MIBSDIR)/%.mib
 	@echo "processing $*"
@@ -286,7 +288,7 @@ release_docs_spec: docs
 	$(INSTALL_DATA) $(INFO_FILE) $(RELSYSDIR)
 	$(INSTALL_DIR) $(RELEASE_PATH)/man/man1
 	$(INSTALL_DATA) $(MAN1_FILES) $(RELEASE_PATH)/man/man1
-	$(INSTALL_DIR) $(RELEASE_PATH)/man/man
+	$(INSTALL_DIR) $(RELEASE_PATH)/man/man3
 	$(INSTALL_DATA) $(MAN3_FILES) $(RELEASE_PATH)/man/man3
 	$(INSTALL_DIR) $(RELEASE_PATH)/man/man6
 	$(INSTALL_DATA) $(MAN6_FILES) $(RELEASE_PATH)/man/man6
diff --git a/lib/snmp/doc/src/notes.xml b/lib/snmp/doc/src/notes.xml
index 6a20d8ee3a..4178192120 100644
--- a/lib/snmp/doc/src/notes.xml
+++ b/lib/snmp/doc/src/notes.xml
@@ -33,6 +33,136 @@
   </header>
 
   <section>
+    <title>SNMP Development Toolkit 4.21</title>
+    <p>Version 4.21 supports code replacement in runtime from/to
+      version 4.20.1, 4.20 and 4.19. </p>
+
+    <section>
+      <title>Improvements and new features</title>
+<!--
+      <p>-</p>
+-->
+      <list type="bulleted">
+        <item>
+          <p>[manager] There was no way to specify transport domain. 
+	  The transport domains was assumed to be IPv4 (transportDomainUdpIpv4).
+	  This has now been changed so that it can also be IPv6 
+	  (transportDomainUdpIpv6). 
+	  To facilitate this, the transport domain, <c>tdomain</c>, 
+	  is now a (new) valid option when 
+	  <seealso marker="snmpm#register_agent">registering</seealso>
+	  a new agent (and 
+	  <seealso marker="snmpm#update_agent_info">updating</seealso> 
+	  agent info). </p>
+	  <p>This also mean that the transport behaviour has changed. </p>
+          <p>Own Id: OTP-9305</p>
+          <p>Aux Id: Seq 11847</p>
+        </item>
+
+        <item>
+          <p>[compiler] Added the option 
+	  <seealso marker="snmpc#compile">warnings_as_errors</seealso> 
+	  (for the SNMP MIB compiler (escript) frontend, the option 
+	  <seealso marker="snmpc(command)#option_wae">--wae</seealso> is used) 
+	  which specifies whether warnings should be treated as errors. </p>
+          <p>Tuncer Ayaz</p>
+          <p>Own Id: OTP-9437</p>
+        </item>
+      </list>
+
+    </section>
+
+    <section>
+      <title>Fixed Bugs and Malfunctions</title>
+<!--
+      <p>-</p> 
+-->
+
+      <list type="bulleted">
+        <item>
+          <p>The snmp config tool could not handle (manager) audit trail config 
+	  because the option seqno was not handled. </p>
+	  <p>Own Id: OTP-9354</p>
+	</item>
+
+        <item>
+          <p>[agent] The SNMP ACM cache was not properly updated when
+	  changes where made to the VACM security-to-group, access and
+	  view-tree-family tables. </p>
+	  <p>Own Id: OTP-9367</p>
+          <p>Aux Id: Seq 11858</p>
+	</item>
+
+        <item>
+          <p>Fixed install directory typo for man3. </p>
+	  <p>Peter Lemenkov</p>
+	  <p>Hans Ulrich Niedermann</p>
+	  <p>Own Id: OTP-9442</p>
+	</item>
+
+      </list>
+    </section>
+
+
+    <section>
+      <title>Incompatibilities</title>
+      <p>-</p>
+    </section>
+
+  </section> <!-- 4.21 -->
+
+
+  <section>
+    <title>SNMP Development Toolkit 4.20.1</title>
+    <p>Version 4.20.1 supports code replacement in runtime from/to
+      version 4.20, 4.19 and 4.18.</p>
+
+    <section>
+      <title>Improvements and new features</title>
+      <p>-</p>
+<!--
+      <list type="bulleted">
+        <item>
+          <p>Added type specs for functions that do not return. </p>
+          <p>Kostis Sagonas</p>
+          <p>Own Id: OTP-9208</p>
+        </item>
+      </list>
+-->
+    </section>
+
+    <section>
+      <title>Fixed Bugs and Malfunctions</title>
+<!--
+      <p>-</p> 
+-->
+      <list type="bulleted">
+        <item>
+          <p>[agent] Did not handle transport domains properly in some cases, 
+	  for instance trap sending. </p>
+	  <p>Own Id: OTP-9400</p>
+	</item>
+
+        <item>
+          <p>[agent] Wrong default transport domain, snmpUDPDomain, instead
+	  of transportDomainUdpIpv4. </p>
+	  <p>Own Id: OTP-9425</p>
+          <p>Aux Id: Seq 11874</p>
+	</item>
+
+      </list>
+    </section>
+
+
+    <section>
+      <title>Incompatibilities</title>
+      <p>-</p>
+    </section>
+
+  </section> <!-- 4.20.1 -->
+
+
+  <section>
     <title>SNMP Development Toolkit 4.20</title>
     <p>Version 4.20 supports code replacement in runtime from/to
       version 4.19 and 4.18.</p>
diff --git a/lib/snmp/doc/src/snmpc.xml b/lib/snmp/doc/src/snmpc.xml
index 771629492d..61d19251c5 100644
--- a/lib/snmp/doc/src/snmpc.xml
+++ b/lib/snmp/doc/src/snmpc.xml
@@ -48,7 +48,11 @@
       <type>
         <v>File = string()</v>
         <v>Options = [opt()]</v>
-        <v>opt() = db() | relaxed_row_name_assign_check() | deprecated() | description() | reference() | group_check() |  i() | il() | imports() | module() | module_identity() | module_compliance() | agent_capabilities() | outdir() |  no_defs() | verbosity() | warnings()</v>
+        <v>opt() = db() | relaxed_row_name_assign_check() | deprecated() | 
+	description() | reference() | group_check() |  i() | il() | 
+	imports() | module() | module_identity() | module_compliance() | 
+	agent_capabilities() | outdir() |  no_defs() | verbosity() | 
+	warnings() | warnings_as_errors()</v>
         <v>db() = {db, volatile|persistent|mnesia}</v>
         <v>deprecated() = {deprecated, bool()}</v>
         <v>relaxed_row_name_assign_check() = relaxed_row_name_assign_check</v>
@@ -66,6 +70,7 @@
         <v>outdir() = {outdir, dir()}</v>
         <v>verbosity() = {verbosity, silence|warning|info|log|debug|trace}</v>
         <v>warnings() = {warnings, bool()}</v>
+	<v>warnings_as_errors() = warnings_as_errors</v>
         <v>dir() = string()</v>
         <v>BinFileName = string()</v>
       </type>
@@ -200,11 +205,17 @@
 
           <item>
 	    <p>The option <c>warnings</c> specifies whether warning
-              messages should be shown. </p>
+	    messages should be shown. </p>
 	    <p>Default is <c>true</c>. </p>
           </item>
 
+	  <item>
+	    <p>The option <c>warnings_as_errors</c>, if present, specifies 
+	    whether warnings should be treated as errors.</p>
+	  </item>
+
         </list>
+	
         <p>The MIB compiler understands both SMIv1 and SMIv2 MIBs.  It
           uses the <c>MODULE-IDENTITY</c> statement to determine if the MIB is
           version 1 or 2.
diff --git a/lib/snmp/doc/src/snmpc_cmd.xml b/lib/snmp/doc/src/snmpc_cmd.xml
index 9358382a10..72116f8981 100644
--- a/lib/snmp/doc/src/snmpc_cmd.xml
+++ b/lib/snmp/doc/src/snmpc_cmd.xml
@@ -50,6 +50,8 @@
 	with definitions of Erlang constants for the objects in 
 	the MIB, see 
 	<seealso marker="snmpc#mib_to_hrl">mib_to_hrl/1</seealso>. </p>
+
+	<marker id="options"></marker>
       </desc>
     </func>
   </funcs>
@@ -58,15 +60,18 @@
     <title>Compiler options</title>
     <p>The following options are supported (note that most of these relate 
     to the compilation of the MIB file):</p>
+    <marker id="option_help"></marker>
     <taglist>
       <tag>--help</tag>
       <item>
         <p>Prints help info.</p>
+	<marker id="option_version"></marker>
       </item>
 
       <tag>--version</tag>
       <item>
         <p>Prints application and mib format version.</p>
+	<marker id="option_verbosity"></marker>
       </item>
 
       <tag>--verbosity <em>verbosity</em></tag>
@@ -74,11 +79,20 @@
         <p>Print debug info. </p>
 	<p><c>verbosity</c> = <c>trace</c> | <c>debug</c> | <c>log</c> | <c>info</c> | <c>silence</c></p>
 	<p>Defaults to <c>silence</c>.</p>
+	<marker id="option_warnings"></marker>
       </item>
 
       <tag>--warnings</tag>
       <item>
         <p>Print warning messages. </p>
+	<marker id="option_wae"></marker>
+      </item>
+
+      <tag>--wae</tag>
+      <item>
+        <p>Warnings as errors. 
+	Indicates that warnings shall be treated as errors. </p>
+	<marker id="option_odir"></marker>
       </item>
 
       <tag>--o <em>directory</em></tag>
@@ -86,6 +100,7 @@
         <p>The directory where the compiler should place the output files.
 	If not specified, output files will be placed in the current working
 	directory.</p>
+	<marker id="option_idir"></marker>
       </item>
 
       <tag>--i <em>Directory</em></tag>
@@ -94,6 +109,7 @@
 	By default, the current working directory is always included. </p>
 	<p>This option can be present several times, each time specifying
 	<em>one</em> path. </p>
+	<marker id="option_ildir"></marker>
       </item>
 
       <tag>--il <em>Directory</em></tag>
@@ -106,6 +122,7 @@
 	the current version may be in the system). The current directory 
 	and the "snmp-home"/priv/mibs/ are always listed last in the
         include path. </p>
+	<marker id="option_sgc"></marker>
       </item>
 
       <tag>--sgc</tag>
@@ -114,42 +131,50 @@
 	group check of the mib compiler. 
 	That is, should the OBJECT-GROUP and the NOTIFICATION-GROUP 
 	macro(s) be checked for correctness or not. </p>
+	<marker id="option_dep"></marker>
       </item>
 
       <tag>--dep</tag>
       <item>
         <p>Keep deprecated definition(s). 
 	If not specified the compiler will ignore deprecated definitions. </p>
+	<marker id="option_desc"></marker>
       </item>
 
       <tag>--desc</tag>
       <item>
         <p>The DESCRIPTION field will be included. </p>
+	<marker id="option_ref"></marker>
       </item>
 
       <tag>--ref</tag>
       <item>
         <p>The REFERENCE field will be included. </p>
+	<marker id="option_imp"></marker>
       </item>
 
       <tag>--imp</tag>
       <item>
         <p>The IMPORTS field will be included. </p>
+	<marker id="option_mi"></marker>
       </item>
 
       <tag>--mi</tag>
       <item>
         <p>The MODULE-IDENTITY field will be included. </p>
+	<marker id="option_mc"></marker>
       </item>
 
       <tag>--mc</tag>
       <item>
         <p>The MODULE-COMPLIANCE field will be included. </p>
+	<marker id="option_ac"></marker>
       </item>
 
       <tag>--ac</tag>
       <item>
         <p>The AGENT-CAPABILITIES field will be included. </p>
+	<marker id="option_mod"></marker>
       </item>
 
       <tag>--mod <em>module</em></tag>
@@ -157,6 +182,7 @@
         <p>The module which implements all the instrumentation functions. </p>
 	<p>The name of all instrumentation functions must be the 
 	same as the corresponding managed object it implements. </p>
+	<marker id="option_nd"></marker>
       </item>
 
       <tag>--nd</tag>
@@ -165,6 +191,7 @@
 	used if a managed object have no instrumentation function.
 	Instead this will be reported as an error, and the compilation 
 	aborts. </p>
+	<marker id="option_rrnac"></marker>
       </item>
 
       <tag>--rrnac</tag>
@@ -176,6 +203,7 @@
 	This means that the error will be converted to a warning. </p>
 	<p>By default it is not included, but if this option is present 
 	it will be. </p>
+	<marker id="see_also"></marker>
       </item>
 
     </taglist>
diff --git a/lib/snmp/doc/src/snmpm.xml b/lib/snmp/doc/src/snmpm.xml
index b527d171b0..c36a1b2a24 100644
--- a/lib/snmp/doc/src/snmpm.xml
+++ b/lib/snmp/doc/src/snmpm.xml
@@ -283,27 +283,27 @@ sec_level = noAuthNoPriv | authNoPriv | authPriv
         <v>TargetName = target_name()</v>
         <v>Config = [agent_config()]</v>
         <v>agent_config() = {Item, Val}</v>
-        <v>Item = engine_id | address | port | community | timeout | max_message_size | version | sec_model | sec_name | sec_level</v>
+        <v>Item = engine_id | address | port | community | timeout | max_message_size | version | sec_model | sec_name | sec_level | tdomain</v>
         <v>Val = term()</v>
         <v>Reason = term()</v>
       </type>
       <desc>
         <p>Explicitly instruct the manager to handle this agent, with
-          <c>UserId</c> as the responsible user. </p>
-        <p>Called to instruct the manager that this agent 
-          shall be handled. This function is used when
-          the user knows in advance which agents the
-          manager shall handle.
-          Note that there is an alternate way to do the same thing:
-          Add the agent to the manager config files (see 
-          <seealso marker="snmp_manager_config_files#agents">agents.conf</seealso>).</p>
+	<c>UserId</c> as the responsible user. </p>
+        <p>Called to instruct the manager that this agent shall be handled. 
+	This function is used when the user knows in advance which agents 
+	the manager shall handle.
+	Note that there is an alternate way to do the same thing:
+	Add the agent to the manager config files (see 
+	<seealso marker="snmp_manager_config_files#agents">agents.conf</seealso>).</p>
         <p><c>TargetName</c> is a non-empty string, 
-          uniquely identifying the agent. </p>
-        <p>The type of <c>Val</c> depends on <c>Item</c>: </p>
+	uniquely identifying the agent. </p>
+	<p>The type of <c>Val</c> depends on <c>Item</c>: </p>
 <code type="none"><![CDATA[
 [mandatory] engine_id = string()
 [mandatory] address = ip_address()
 [optional]  port = integer()
+[optional]  tdomain = transportDomainUdpIpv4 | transportDomainUdpIpv6
 [optional]  community = string()
 [optional]  timeout = integer() | snmp_timer()
 [optional]  max_message_size = integer()
@@ -312,7 +312,9 @@ sec_level = noAuthNoPriv | authNoPriv | authPriv
 [optional]  sec_name = string() 
 [optional]  sec_level = noAuthNoPriv | authNoPriv | authPriv
 ]]></code>
-        <p>Note that if no <c>Port</c> is given, the default value is used.</p>
+        <p>Note that if no <c>tdomain</c> is given, the default value,
+	<c>transportDomainUdpIpv4</c>, is used.</p>
+        <p>Note that if no <c>port</c> is given, the default value is used.</p>
 
         <marker id="unregister_agent"></marker>
       </desc>
@@ -348,17 +350,25 @@ sec_level = noAuthNoPriv | authNoPriv | authPriv
     </func>
 
     <func>
+      <name>update_agent_info(UserId, TargetName, Info) -> ok | {error, Reason}</name>
       <name>update_agent_info(UserId, TargetName, Item, Val) -> ok | {error, Reason}</name>
       <fsummary>Update agent config</fsummary>
       <type>
         <v>UserId = term()</v>
         <v>TargetName = target_name()</v>
-        <v>Item = atom()</v>
-        <v>Val = term()</v>
+        <v>Info = [{item(), item_value()}]</v>
+        <v>Item = item()</v>
+        <v>item() = atom()</v>
+        <v>Val = item_value()</v>
+        <v>item_value() = term()</v>
         <v>Reason = term()</v>
       </type>
       <desc>
-        <p>Update agent config.</p>
+        <p>Update agent config. The function <c>update_agent_info/3</c> 
+	should be used when several values needs to be updated atomically. </p>
+	<p>See function 
+	<seealso marker="#register_agent">register_agent</seealso>) 
+	for more info about what kind of items are allowed. </p>
 
         <marker id="which_agents"></marker>
       </desc>
diff --git a/lib/snmp/src/agent/snmp_view_based_acm_mib.erl b/lib/snmp/src/agent/snmp_view_based_acm_mib.erl
index 28469a7b4e..37f6dd3f26 100644
--- a/lib/snmp/src/agent/snmp_view_based_acm_mib.erl
+++ b/lib/snmp/src/agent/snmp_view_based_acm_mib.erl
@@ -247,6 +247,7 @@ add_sec2group(SecModel, SecName, GroupName) ->
 	    Key = [Key1, length(Key2) | Key2],
 	    case table_cre_row(vacmSecurityToGroupTable, Key, Row) of
 		true ->
+		    snmpa_agent:invalidate_ca_cache(),
 		    {ok, Key};
 		false ->
 		    {error, create_failed}
@@ -260,6 +261,7 @@ add_sec2group(SecModel, SecName, GroupName) ->
 delete_sec2group(Key) ->
     case table_del_row(vacmSecurityToGroupTable, Key) of
 	true ->
+	    snmpa_agent:invalidate_ca_cache(),
 	    ok;
 	false ->
 	    {error, delete_failed}
@@ -279,6 +281,7 @@ add_access(GroupName, Prefix, SecModel, SecLevel, Match, RV, WV, NV) ->
 	    Key3 = [SM, SL],
 	    Key  = Key1 ++ Key2 ++ Key3, 
 	    snmpa_vacm:insert([{Key, Row}], false),
+            snmpa_agent:invalidate_ca_cache(),
 	    {ok, Key};
 	{error, Reason} ->
 	    {error, Reason};
@@ -287,6 +290,7 @@ add_access(GroupName, Prefix, SecModel, SecLevel, Match, RV, WV, NV) ->
     end.
 
 delete_access(Key) ->
+    snmpa_agent:invalidate_ca_cache(),
     snmpa_vacm:delete(Key).
 
 
@@ -299,6 +303,7 @@ add_view_tree_fam(ViewIndex, SubTree, Status, Mask) ->
 	    Key  = [length(Key1) | Key1] ++ [length(Key2) | Key2],
 	    case table_cre_row(vacmViewTreeFamilyTable, Key, Row) of
 		true ->
+		    snmpa_agent:invalidate_ca_cache(),
 		    {ok, Key};
 		false ->
 		    {error, create_failed}
@@ -312,6 +317,7 @@ add_view_tree_fam(ViewIndex, SubTree, Status, Mask) ->
 delete_view_tree_fam(Key) ->
     case table_del_row(vacmViewTreeFamilyTable, Key) of
 	true ->
+	    snmpa_agent:invalidate_ca_cache(),
 	    ok;
 	false ->
 	    {error, delete_failed}
diff --git a/lib/snmp/src/agent/snmpa_agent.erl b/lib/snmp/src/agent/snmpa_agent.erl
index 82a7ec647b..6322f0f21d 100644
--- a/lib/snmp/src/agent/snmpa_agent.erl
+++ b/lib/snmp/src/agent/snmpa_agent.erl
@@ -1626,7 +1626,7 @@ invalidate_ca_cache() ->
 				    MasterAgent ! invalidate_ca_cache;
 				false ->
 				    %% This is running on a sub-agent node, 
-				    %% so sent skip it
+				    %% so skip it
 				    ok
 			    end;
 			_ -> % Not on this node 
diff --git a/lib/snmp/src/agent/snmpa_conf.erl b/lib/snmp/src/agent/snmpa_conf.erl
index 4b88eb69f7..c17a6abbd7 100644
--- a/lib/snmp/src/agent/snmpa_conf.erl
+++ b/lib/snmp/src/agent/snmpa_conf.erl
@@ -424,7 +424,8 @@ target_addr_entry(Name,
 		  EngineId,
 		  TMask) ->
     target_addr_entry(Name, Ip, 162, TagList, 
-		      ParamsName, EngineId, TMask, 2048).
+		      ParamsName, EngineId, 
+		      TMask, 2048).
 
 target_addr_entry(Name, 
 		  Ip, 
@@ -435,7 +436,8 @@ target_addr_entry(Name,
 		  TMask, 
 		  MaxMessageSize) ->
     target_addr_entry(Name, Ip, Udp, 1500, 3, TagList, 
-		      ParamsName, EngineId, TMask, MaxMessageSize).
+		      ParamsName, EngineId, 
+		      TMask, MaxMessageSize).
 
 target_addr_entry(Name, 
 		  Ip, 
@@ -448,7 +450,8 @@ target_addr_entry(Name,
 		  TMask, 
 		  MaxMessageSize) ->
     target_addr_entry(Name, snmp_target_mib:default_domain(), Ip, Udp, 
-		      Timeout, RetryCount, TagList, ParamsName, 
+		      Timeout, RetryCount, TagList, 
+		      ParamsName, EngineId, 
 		      TMask, MaxMessageSize).
 
 target_addr_entry(Name, 
diff --git a/lib/snmp/src/agent/snmpa_mpd.erl b/lib/snmp/src/agent/snmpa_mpd.erl
index 14f62b12f3..4f50b1a674 100644
--- a/lib/snmp/src/agent/snmpa_mpd.erl
+++ b/lib/snmp/src/agent/snmpa_mpd.erl
@@ -32,6 +32,7 @@
 -include("SNMP-MPD-MIB.hrl").
 -include("SNMPv2-TM.hrl").
 -include("SNMP-FRAMEWORK-MIB.hrl").
+-include("TRANSPORT-ADDRESS-MIB.hrl").
 
 -define(VMODULE,"MPD").
 -include("snmp_verbosity.hrl").
@@ -981,12 +982,15 @@ generate_discovery_msg2(NoteStore, Pdu,
 discovery_note_timeout(Timeout) ->
     (Timeout div 100) + 1.
     
-generate_discovery_msg(NoteStore, {?snmpUDPDomain, [A,B,C,D,U1,U2]}, 
+generate_discovery_msg(NoteStore, {TDomain, TAddress}, 
 		       Pdu, ScopedPduBytes, 
 		       ContextEngineID, ManagerEngineID, 
 		       SecModel, SecName, SecLevelFlag, 
 		       InitialUserName, 
 		       ContextName, Timeout) ->
+
+    {ok, {_Domain, Address}} = transform_taddr(TDomain, TAddress),
+
     %% 7.1.7
     ?vdebug("generate_discovery_msg -> 7.1.7 (~w)", [ManagerEngineID]),
     MsgID     = generate_msg_id(),
@@ -1027,7 +1031,7 @@ generate_discovery_msg(NoteStore, {?snmpUDPDomain, [A,B,C,D,U1,U2]},
 	    %% Log(Packet),
 	    inc_snmp_out_vars(Pdu),
 	    ?vdebug("generate_discovery_msg -> done", []),
-	    {Packet, {{A,B,C,D}, U1 bsl 8 + U2}};
+	    {Packet, Address};
 
 	Error ->
 	    throw(Error)
@@ -1057,6 +1061,34 @@ generate_sec_discovery_msg(Message, SecModule,
     end.
 	
     
+transform_taddr(?snmpUDPDomain, TAddress) ->
+    transform_taddr(?transportDomainUdpIpv4, TAddress);
+transform_taddr(?transportDomainUdpIpv4, [A, B, C, D, P1, P2]) ->
+    Domain  = transportDomainUdpIpv4, 
+    Addr    = {A,B,C,D}, 
+    Port    = P1 bsl 8 + P2, 
+    Address = {Addr, Port},
+    {ok, {Domain, Address}};
+transform_taddr(?transportDomainUdpIpv4, BadAddr) ->
+    {error, {bad_transportDomainUdpIpv4_address, BadAddr}};
+transform_taddr(?transportDomainUdpIpv6, 
+		[A1, A2, A3, A4, A5, A6, A7, A8, P1, P2]) ->
+    Domain  = transportDomainUdpIpv6, 
+    Addr    = {A1, A2, A3, A4, A5, A6, A7, A8},
+    Port    = P1 bsl 8 + P2,
+    Address = {Addr, Port},
+    {ok, {Domain, Address}};
+transform_taddr(?transportDomainUdpIpv6, BadAddr) ->
+    {error, {bad_transportDomainUdpIpv6_address, BadAddr}};
+transform_taddr(BadTDomain, TAddress) ->
+    case lists:member(BadTDomain, snmp_conf:all_tdomains()) of
+	true ->
+	    {error, {unsupported_tdomain, BadTDomain, TAddress}};
+	false ->
+	    {error, {unknown_tdomain, BadTDomain, TAddress}}
+    end.
+
+
 process_taddrs(Dests) ->
     ?vtrace("process_taddrs -> entry with"
 	    "~n   Dests: ~p", [Dests]),
@@ -1066,46 +1098,44 @@ process_taddrs([], Acc) ->
     ?vtrace("process_taddrs -> entry when done with"
 	    "~n   Acc: ~p", [Acc]),
     lists:reverse(Acc);
-
+    
 %% v3
-process_taddrs([{{?snmpUDPDomain, [A,B,C,D,U1,U2]}, SecData} | T], Acc) ->
+process_taddrs([{{TDomain, TAddress}, SecData} | T], Acc) ->
     ?vtrace("process_taddrs -> entry when v3 with"
-	    "~n   A:       ~p"
-	    "~n   B:       ~p"
-	    "~n   C:       ~p"
-	    "~n   D:       ~p"
-	    "~n   U1:      ~p"
-	    "~n   U2:      ~p"
-	    "~n   SecData: ~p", [A, B, C, D, U1, U2, SecData]),
-    Entry = {{snmpUDPDomain, {{A,B,C,D}, U1 bsl 8 + U2}}, SecData}, 
-    process_taddrs(T, [Entry | Acc]);
-%% Bad v3
-process_taddrs([{{TDomain, TAddr}, _SecData} | T], Acc) ->
-    ?vtrace("process_taddrs -> entry when bad v3 with"
-	    "~n   TDomain: ~p"
-	    "~n   TAddr:   ~p", [TDomain, TAddr]),
-    user_err("Bad TDomain/TAddr: ~w/~w", [TDomain, TAddr]),
-    process_taddrs(T, Acc);
+	    "~n   TDomain:  ~p"
+	    "~n   TAddress: ~p"
+	    "~n   SecData:  ~p", [TDomain, TAddress, SecData]),
+    case transform_taddr(TDomain, TAddress) of
+	{ok, DestAddr} ->
+	    ?vtrace("process_taddrs -> transformed: "
+		    "~n   DestAddr: ~p", [DestAddr]),
+	    Entry = {DestAddr, SecData}, 
+	    process_taddrs(T, [Entry | Acc]);
+	{error, Reason} ->
+	    ?vinfo("Failed transforming v3 domain and address"
+		   "~n   Reason:  ~p", [Reason]),
+	    user_err("Bad TDomain/TAddress: ~w/~w", [TDomain, TAddress]),
+	    process_taddrs(T, Acc)
+    end;
 %% v1 & v2
-process_taddrs([{?snmpUDPDomain, [A,B,C,D,U1,U2]} | T], Acc) ->
+process_taddrs([{TDomain, TAddress} | T], Acc) ->
     ?vtrace("process_taddrs -> entry when v1/v2 with"
-	    "~n   A:  ~p"
-	    "~n   B:  ~p"
-	    "~n   C:  ~p"
-	    "~n   D:  ~p"
-	    "~n   U1: ~p"
-	    "~n   U2: ~p", [A, B, C, D, U1, U2]),
-    Entry = {snmpUDPDomain, {{A,B,C,D}, U1 bsl 8 + U2}}, 
-    process_taddrs(T, [Entry | Acc]);
-%% Bad v1 or v2
-process_taddrs([{TDomain, TAddr} | T], Acc) ->
-    ?vtrace("process_taddrs -> entry when bad v1/v2 with"
-	    "~n   TDomain: ~p"
-	    "~n   TAddr:   ~p", [TDomain, TAddr]),
-    user_err("Bad TDomain/TAddr: ~w/~w", [TDomain, TAddr]),
-    process_taddrs(T, Acc);
+	    "~n   TDomain:  ~p"
+	    "~n   TAddress: ~p", [TDomain, TAddress]),
+    case transform_taddr(TDomain, TAddress) of
+	{ok, DestAddr} ->
+	    ?vtrace("process_taddrs -> transformed: "
+		    "~n   DestAddr: ~p", [DestAddr]),
+	    Entry = DestAddr, 
+	    process_taddrs(T, [Entry | Acc]);
+	{error, Reason} ->
+	    ?vinfo("Failed transforming v1/v2 domain and address: "
+		   "~n   Reason:  ~p", [Reason]),
+	    user_err("Bad TDomain/TAddress: ~w/~w", [TDomain, TAddress]),
+	    process_taddrs(T, Acc)
+    end;
 process_taddrs(Crap, Acc) ->
-    throw({error, {taddrs_crap, Crap, Acc}}).
+    throw({error, {bad_taddrs, Crap, Acc}}).
 
 
 mk_v1_v2_packet_list(To, Packet, Len, Pdu) ->
diff --git a/lib/snmp/src/app/snmp.appup.src b/lib/snmp/src/app/snmp.appup.src
index 5deb40be0f..8e1855b4df 100644
--- a/lib/snmp/src/app/snmp.appup.src
+++ b/lib/snmp/src/app/snmp.appup.src
@@ -22,82 +22,82 @@
 %% ----- U p g r a d e -------------------------------------------------------
 
  [
+  {"4.20.1", 
+   [
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
+    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
+    {load_module, snmp_config, soft_purge, soft_purge, []}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_config]}, 
+    {update, snmpa_agent, soft, soft_purge, soft_purge, [snmpa_mpd]}, 
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]}, 
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]}
+   ]
+  }, 
+  {"4.20", 
+   [
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
+    {load_module, snmp_target_mib, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
+    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
+    {load_module, snmp_config, soft_purge, soft_purge, []}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_config]}, 
+    {update, snmpa_agent, soft, soft_purge, soft_purge, [snmpa_mpd]}, 
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]}, 
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]}
+   ]
+  }, 
   {"4.19", 
    [
     {load_module, snmpa, soft_purge, soft_purge, []}, 
-    {load_module, snmpm, soft_purge, soft_purge, [snmpm_server]}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
     {load_module, snmpa_usm, soft_purge, soft_purge, []}, 
     {load_module, snmpm_usm, soft_purge, soft_purge, []}, 
     {load_module, snmp_log, soft_purge, soft_purge, []}, 
     {load_module, snmp_pdus, soft_purge, soft_purge, []}, 
     {load_module, snmp_conf, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
     {load_module, snmp_misc, soft_purge, soft_purge, []},
     {load_module, snmp_config, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_mpd, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
     {load_module, snmpa_trap, soft_purge, soft_purge, 
      [snmpa_mpd, snmp_notification_mib, snmp_target_mib, snmpa_net_if]}, 
     {load_module, snmpa_acm, soft_purge, soft_purge, 
      [snmp_conf, snmpa_mpd, snmp_target_mib]}, 
     {load_module, snmpa_conf, soft_purge, soft_purge, 
-     [snmp_notification_mib]}, 
+     [snmp_config, snmp_notification_mib]}, 
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
     {load_module, snmp_notification_mib, soft_purge, soft_purge, 
      [snmp_conf, snmp_target_mib]}, 
     {load_module, snmp_community_mib, soft_purge, soft_purge, []}, 
     {load_module, snmp_target_mib, soft_purge, soft_purge, 
      [snmp_conf]},
-    {update, snmpm_net_if, soft, soft_purge, soft_purge, []},
-    {update, snmpm_server, soft, soft_purge, soft_purge, [snmpm_net_if]},
-    {update, snmpa_net_if, soft, soft_purge, soft_purge, 
-     [snmp_conf, snmpa_mpd]},
-    {update, snmpa_agent, soft, soft_purge, soft_purge, 
-     [snmpa_acm, snmpa_mpd, snmpa_trap]}
-   ]
-  }, 
-  {"4.18", 
-   [
-    {load_module, snmpa, soft_purge, soft_purge, []}, 
-    {load_module, snmpm, soft_purge, soft_purge, [snmpm_server]}, 
-    {load_module, snmpa_usm, soft_purge, soft_purge, []}, 
-    {load_module, snmpm_usm, soft_purge, soft_purge, []}, 
-    {load_module, snmp_misc, soft_purge, soft_purge, []},
-    {load_module, snmp_log, soft_purge, soft_purge, []}, 
-    {load_module, snmp_pdus, soft_purge, soft_purge, []}, 
-    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
-    {load_module, snmp_config, soft_purge, soft_purge, [snmp_conf]}, 
-    {load_module, snmpa_conf, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_mpd, soft_purge, soft_purge, [snmp_conf]}, 
-    {load_module, snmpa_vacm, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_trap, soft_purge, soft_purge, 
-     [snmpa_mpd, snmp_notification_mib, snmp_target_mib, snmpa_net_if]}, 
-    {load_module, snmpa_acm, soft_purge, soft_purge, 
-     [snmp_conf, snmpa_mpd, snmp_target_mib]}, 
-    {load_module, snmpa, soft_purge, soft_purge, 
-     [snmp_community_mib, 
-      snmp_framework_mib, 
-      snmp_standard_mib, 
-      snmp_target_mib, 
-      snmp_user_based_sm_mib, 
-      snmp_view_based_acm_mib]},
-    {load_module, snmp_notification_mib, soft_purge, soft_purge, 
-     [snmp_conf, snmp_target_mib, snmpa_mib_lib]}, 
-    {load_module, snmp_community_mib,      soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_framework_mib,      soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_standard_mib,       soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_target_mib,         soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_user_based_sm_mib,  soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, 
-     [snmpa_mib_lib, snmpa_vacm]},
-    {load_module, snmpa_mib_lib, soft_purge, soft_purge, []},
-
-    {update, snmpm_net_if, soft, soft_purge, soft_purge, []},
-    {update, snmpm_server, soft, soft_purge, soft_purge, [snmpm_net_if]},
-
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]},
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]},
     {update, snmpa_net_if, soft, soft_purge, soft_purge, 
      [snmp_conf, snmpa_mpd]},
     {update, snmpa_agent, soft, soft_purge, soft_purge, 
@@ -109,84 +109,82 @@
 %% ------D o w n g r a d e ---------------------------------------------------
 
  [
+  {"4.20.1", 
+   [
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
+    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
+    {load_module, snmp_config, soft_purge, soft_purge, []}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_config]}, 
+    {update, snmpa_agent, soft, soft_purge, soft_purge, [snmpa_mpd]}, 
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]}, 
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]}
+   ]
+  }, 
+  {"4.20", 
+   [
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
+    {load_module, snmp_target_mib, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
+    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
+    {load_module, snmp_config, soft_purge, soft_purge, []}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_config]}, 
+    {update, snmpa_agent, soft, soft_purge, soft_purge, [snmpa_mpd]}, 
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]}, 
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]}
+   ]
+  }, 
   {"4.19", 
    [
     {load_module, snmpa, soft_purge, soft_purge, []}, 
-    {load_module, snmpm, soft_purge, soft_purge, [snmpm_server]}, 
+    {load_module, snmpm, soft_purge, soft_purge, 
+     [snmpm_server, snmpm_config, snmp_config]}, 
     {load_module, snmpa_usm, soft_purge, soft_purge, []}, 
     {load_module, snmpm_usm, soft_purge, soft_purge, []}, 
     {load_module, snmp_log, soft_purge, soft_purge, []}, 
     {load_module, snmp_pdus, soft_purge, soft_purge, []}, 
     {load_module, snmp_conf, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpa_conf, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
     {load_module, snmp_misc, soft_purge, soft_purge, []},
     {load_module, snmp_config, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_mpd, soft_purge, soft_purge, [snmp_conf]}, 
+    {load_module, snmpa_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config]}, 
+    {load_module, snmpm_mpd, soft_purge, soft_purge, 
+     [snmp_conf, snmp_config, snmpm_config]}, 
     {load_module, snmpa_trap, soft_purge, soft_purge, 
      [snmpa_mpd, snmp_notification_mib, snmp_target_mib, snmpa_net_if]}, 
     {load_module, snmpa_acm, soft_purge, soft_purge, 
      [snmp_conf, snmpa_mpd, snmp_target_mib]}, 
     {load_module, snmpa_conf, soft_purge, soft_purge, 
-     [snmp_notification_mib]}, 
+     [snmp_config, snmp_notification_mib]}, 
+    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, []}, 
     {load_module, snmp_notification_mib, soft_purge, soft_purge, 
      [snmp_conf, snmp_target_mib]}, 
     {load_module, snmp_community_mib, soft_purge, soft_purge, []}, 
     {load_module, snmp_target_mib, soft_purge, soft_purge, 
      [snmp_conf]},
-
-    {update, snmpm_net_if, soft, soft_purge, soft_purge, []},
-    {update, snmpm_server, soft, soft_purge, soft_purge, [snmpm_net_if]},
-
-    {update, snmpa_net_if, soft, soft_purge, soft_purge, 
-     [snmp_conf, snmpa_mpd]},
-    {update, snmpa_agent, soft, soft_purge, soft_purge, 
-     [snmpa_acm, snmpa_mpd, snmpa_trap]}
-   ]
-  }, 
-  {"4.18", 
-   [
-    {load_module, snmpa, soft_purge, soft_purge, []}, 
-    {load_module, snmpm, soft_purge, soft_purge, [snmpm_server]}, 
-    {load_module, snmpa_usm, soft_purge, soft_purge, []}, 
-    {load_module, snmpm_usm, soft_purge, soft_purge, []}, 
-    {load_module, snmp_misc, soft_purge, soft_purge, []}, 
-    {load_module, snmp_log, soft_purge, soft_purge, []}, 
-    {load_module, snmp_pdus, soft_purge, soft_purge, []}, 
-    {load_module, snmp_conf, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]}, 
-    {load_module, snmp_config, soft_purge, soft_purge, []}, 
-    {load_module, snmpa_mpd, soft_purge, soft_purge, [snmp_conf]}, 
-    {load_module, snmpa_vacm, soft_purge, soft_purge, []},
-    {load_module, snmpa_trap, soft_purge, soft_purge, 
-     [snmpa_mpd, snmp_notification_mib, snmp_target_mib, snmpa_net_if]}, 
-    {load_module, snmpa_acm, soft_purge, soft_purge, 
-     [snmp_conf, snmpa_mpd, snmp_target_mib]}, 
-    {load_module, snmpa, soft_purge, soft_purge, 
-     [snmp_community_mib, 
-      snmp_framework_mib, 
-      snmp_standard_mib, 
-      snmp_target_mib, 
-      snmp_user_based_sm_mib, 
-      snmp_view_based_acm_mib]},
-    {load_module, snmp_notification_mib, soft_purge, soft_purge, 
-     [snmp_conf, snmp_target_mib, snmpa_mib_lib]}, 
-    {load_module, snmp_community_mib,      soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_framework_mib,      soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_standard_mib,       soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_target_mib,         soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_user_based_sm_mib,  soft_purge, soft_purge, 
-     [snmpa_mib_lib]},
-    {load_module, snmp_view_based_acm_mib, soft_purge, soft_purge, 
-     [snmpa_mib_lib, snmpa_vacm]},
-    {load_module, snmpa_mib_lib, soft_purge, soft_purge, []},
-
-    {update, snmpm_net_if, soft, soft_purge, soft_purge, []},
-    {update, snmpm_server, soft, soft_purge, soft_purge, [snmpm_net_if]},
-
+    {update, snmpm_net_if, soft, soft_purge, soft_purge, 
+     [snmp_conf, snmpm_mpd, snmpm_config]},
+    {update, snmpm_config, soft, soft_purge, soft_purge, [snmp_conf]}, 
+    {update, snmpm_server, soft, soft_purge, soft_purge, 
+     [snmpm_net_if, snmpm_mpd, snmpm_config]},
     {update, snmpa_net_if, soft, soft_purge, soft_purge, 
      [snmp_conf, snmpa_mpd]},
     {update, snmpa_agent, soft, soft_purge, soft_purge, 
diff --git a/lib/snmp/src/compile/Makefile b/lib/snmp/src/compile/Makefile
index 0ceaf276a6..627af6f185 100644
--- a/lib/snmp/src/compile/Makefile
+++ b/lib/snmp/src/compile/Makefile
@@ -45,11 +45,10 @@ RELSYSDIR = $(RELEASE_PATH)/lib/snmp-$(VSN)
 
 include modules.mk
 
-ESCRIPT_BIN = $(ESCRIPT_SRC:%.src=$(BIN)/%)
-
-ERL_FILES = $(MODULES:%=%.erl)
-
-TARGET_FILES = $(MODULES:%=$(EBIN)/%.$(EMULATOR)) $(ESCRIPT_BIN)
+ESCRIPT_BIN  = $(ESCRIPT_SRC:%.src=$(BIN)/%)
+ERL_FILES    = $(MODULES:%=%.erl)
+EBIN_FILES   = $(MODULES:%=$(EBIN)/%.$(EMULATOR)) 
+TARGET_FILES = $(EBIN_FILES) $(ESCRIPT_BIN)
 
 GENERATED_PARSER = $(PARSER_MODULE:%=%.erl)
 
@@ -125,7 +124,7 @@ release_spec: opt
 	$(INSTALL_DIR) $(RELSYSDIR)/src/compiler
 	$(INSTALL_DATA) $(ESCRIPT_SRC) $(PARSER_SRC) $(ERL_FILES) $(INTERNAL_HRL_FILES) $(RELSYSDIR)/src/compiler
 	$(INSTALL_DIR) $(RELSYSDIR)/ebin
-	$(INSTALL_DATA) $(TARGET_FILES) $(RELSYSDIR)/ebin
+	$(INSTALL_DATA) $(EBIN_FILES) $(RELSYSDIR)/ebin
 	$(INSTALL_DIR) $(RELSYSDIR)/bin
 	$(INSTALL_SCRIPT) $(ESCRIPT_BIN) $(RELSYSDIR)/bin
 
diff --git a/lib/snmp/src/compile/snmpc.erl b/lib/snmp/src/compile/snmpc.erl
index 195c238184..5e6b81f1ec 100644
--- a/lib/snmp/src/compile/snmpc.erl
+++ b/lib/snmp/src/compile/snmpc.erl
@@ -108,6 +108,7 @@ compile(FileName) ->
 %%          {i,           [import_dir_string()]}          ["./"]
 %%          {il,          [import_lib_dir_string()]}      []
 %%          {warnings,    bool()}                         true
+%%          warnings_as_errors
 %%          {outdir,      string()}                       "./"
 %%          description
 %%          reference
@@ -199,6 +200,8 @@ get_options([reference|Opts], Formats, Args) ->
     get_options(Opts, ["~n   reference"|Formats], Args);
 get_options([{warnings, Val}|Opts], Formats, Args) ->
     get_options(Opts, ["~n   warnings:    ~w"|Formats], [Val|Args]);
+get_options([warnings_as_errors|Opts], Formats, Args) ->
+    get_options(Opts, ["~n   warnings_as_errors"|Formats], Args);
 get_options([{verbosity, Val}|Opts], Formats, Args) ->
     get_options(Opts, ["~n   verbosity:   ~w"|Formats], [Val|Args]);
 get_options([imports|Opts], Formats, Args) ->
@@ -261,6 +264,8 @@ check_options([{group_check, Atom} | T]) when is_atom(Atom) ->
 check_options([{warnings, Bool} | T]) ->
     check_bool(warnings, Bool),
     check_options(T);
+check_options([warnings_as_errors | T]) ->
+    check_options(T);
 check_options([{db, volatile} | T]) ->
     check_options(T);
 check_options([{db, persistent} | T]) ->
@@ -331,6 +336,9 @@ get_agent_capabilities(Options) ->
 get_module_compliance(Options) ->
     get_bool_option(module_compliance, Options).
 
+get_warnings_as_errors(Options) ->
+    lists:member(warnings_as_errors, Options).
+
 get_relaxed_row_name_assign_check(Options) ->
     lists:member(relaxed_row_name_assign_check, Options).
 
@@ -409,6 +417,7 @@ init(From, MibFileName, Options) ->
     put(reference,          get_reference(Options)),
     put(agent_capabilities, get_agent_capabilities(Options)),
     put(module_compliance,  get_module_compliance(Options)),
+    put(warnings_as_errors, get_warnings_as_errors(Options)),
     File = filename:rootname(MibFileName, ".mib"),
     put(filename, filename:basename(File ++ ".mib")),
     R = case catch c_impl(File) of
diff --git a/lib/snmp/src/compile/snmpc.src b/lib/snmp/src/compile/snmpc.src
index 5f9b154bfa..4e91ae9a03 100644
--- a/lib/snmp/src/compile/snmpc.src
+++ b/lib/snmp/src/compile/snmpc.src
@@ -50,7 +50,8 @@
 	 %% The default verbosity (silence) will be filled in 
 	 %% during argument processing.
 	 verbosity, 
-	 warnings           = false
+	 warnings           = false,
+	 warnings_as_errors = false
         }).
 
 
@@ -74,6 +75,7 @@
 %% --version
 %% --verbosity V
 %% --warnings
+%% --wae
 main(Args) when is_list(Args) ->
     case (catch process_args(Args)) of
 	ok ->
@@ -156,7 +158,8 @@ mk_mib_options(#state{outdir             = OutDir,
 		      %% The default verbosity (silence) will be filled in 
 		      %% during argument processing.
 		      verbosity          = V, 
-		      warnings           = W}) ->
+		      warnings           = W,
+                      warnings_as_errors = WAE}) ->
     [{outdir,                        OutDir}, 
      {db,                            DB},
      {i,                             IDs},
@@ -178,7 +181,8 @@ mk_mib_options(#state{outdir             = OutDir,
 	maybe_option(Imp,   imports) ++ 
 	maybe_option(MI,    module_identity) ++ 
 	maybe_option(MC,    module_compliance) ++ 
-	maybe_option(AC,    agent_capabilities).
+	maybe_option(AC,    agent_capabilities) ++ 
+	maybe_option(WE,    warnings_as_errors).
 
 maybe_option(true, Opt) -> [Opt];
 maybe_option(_,    _)   -> [].
@@ -292,6 +296,8 @@ process_args(["--nd"|Args], State) ->
     process_args(Args, State#state{no_defaults = true});
 process_args(["--rrnac"|Args], State) ->
     process_args(Args, State#state{relaxed_row_name_assigne_check = true});
+process_args(["--wae"|Args], State) ->
+    process_args(Args, State#state{warnings_as_errors = true});
 process_args([MIB], State) ->
     Ext = filename:extension(MIB),
     if 
@@ -371,6 +377,8 @@ usage() ->
 	      "~n                              a warning. "
 	      "~n                              By default it is not included, but if this option is "
 	      "~n                              present it will be. "
+	      "~n   --wae                    - Warnings as errors. "
+              "~n                              Indicates that warnings shall be treated as errors. "
 	      "~n   "
 	      "~n", []),
     halt(1).
diff --git a/lib/snmp/src/compile/snmpc_lib.hrl b/lib/snmp/src/compile/snmpc_lib.hrl
index 000486e728..35ec9abd03 100644
--- a/lib/snmp/src/compile/snmpc_lib.hrl
+++ b/lib/snmp/src/compile/snmpc_lib.hrl
@@ -1,7 +1,7 @@
 %% 
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2009. All Rights Reserved.
+%% Copyright Ericsson AB 2009-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,8 +20,17 @@
 -ifndef(snmpc_lib).
 -define(snmpc_lib, true).
 
--define(vwarning(F, A),           ?verbosity(warning, F, A, ignore)).
--define(vwarning2(F, A, MibLine), ?verbosity(warning, F, A, MibLine)).
+-define(vwarning(F, A),
+	case get(warnings_as_errors) of
+	    true -> snmpc_lib:error(F, A);
+	    _ -> ?verbosity(warning, F, A, ignore)
+	end).
+
+-define(vwarning2(F, A, MibLine),
+	 case get(warnings_as_errors) of
+	     true -> snmpc_lib:error(F, A, MibLine);
+	     _ -> ?verbosity(warning, F, A, MibLine)
+	 end).
 -define(vinfo(F, A),              ?verbosity(info,    F, A, ignore)).
 -define(vinfo2(F, A, MibLine),    ?verbosity(info,    F, A, MibLine)).
 -define(vlog(F, A),               ?verbosity(log,     F, A, ignore)).
diff --git a/lib/snmp/src/manager/snmpm.erl b/lib/snmp/src/manager/snmpm.erl
index 0d084332de..6d2ac8d747 100644
--- a/lib/snmp/src/manager/snmpm.erl
+++ b/lib/snmp/src/manager/snmpm.erl
@@ -50,7 +50,7 @@
 	 register_agent/2, register_agent/3, register_agent/4, 
 	 unregister_agent/2, unregister_agent/3,
 	 which_agents/0, which_agents/1, 
-	 agent_info/2, update_agent_info/4, 
+	 agent_info/2, update_agent_info/3, update_agent_info/4, 
 	 
 	 register_usm_user/3, unregister_usm_user/2, 
 	 which_usm_users/0, which_usm_users/1, 
@@ -167,6 +167,7 @@
 -include_lib("snmp/include/snmp_types.hrl").
 -include("snmpm_atl.hrl").
 -include("snmpm_internal.hrl").
+-include("snmp_verbosity.hrl").
 
 -define(DEFAULT_AGENT_PORT, 161).
 
@@ -447,8 +448,11 @@ agent_info(Addr, Port, Item) ->
 	    Error
     end.
 
+update_agent_info(UserId, TargetName, Info) when is_list(Info) ->
+    snmpm_config:update_agent_info(UserId, TargetName, Info).
+
 update_agent_info(UserId, TargetName, Item, Val) ->
-    snmpm_config:update_agent_info(UserId, TargetName, Item, Val).
+    update_agent_info(UserId, TargetName, [{Item, Val}]).
 
 %% Backward compatibility functions
 update_agent_info(UserId, Addr, Port, Item, Val) ->
diff --git a/lib/snmp/src/manager/snmpm_config.erl b/lib/snmp/src/manager/snmpm_config.erl
index fd6da3e71a..c2e57abddb 100644
--- a/lib/snmp/src/manager/snmpm_config.erl
+++ b/lib/snmp/src/manager/snmpm_config.erl
@@ -1,7 +1,7 @@
 %% 
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2004-2010. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -36,7 +36,8 @@
 	 user_info/0, user_info/1, user_info/2, 
 
 	 register_agent/3, unregister_agent/2, 
-	 agent_info/0, agent_info/2, agent_info/3, update_agent_info/4, 
+	 agent_info/0, agent_info/2, agent_info/3, 
+	 update_agent_info/3, update_agent_info/4, 
 	 which_agents/0, which_agents/1, 
 
 	 is_known_engine_id/2, 
@@ -84,7 +85,9 @@
 
 	 backup/1,
 
-	 mk_target_name/3
+	 mk_target_name/3,
+	 
+	 default_transport_domain/0
 
 	]).
 
@@ -127,23 +130,24 @@
 
 
 %% Macros and Constants:
--define(SERVER,    ?MODULE).
--define(BACKUP_DB, snmpm_config_backup).
--define(CONFIG_DB, snmpm_config_db).
+-define(SERVER,             ?MODULE).
+-define(BACKUP_DB,          snmpm_config_backup).
+-define(CONFIG_DB,          snmpm_config_db).
 
 -define(DEFAULT_USER,       default_user).
 
 -define(DEFAULT_AGENT_PORT, 161).
 
--define(IRB_DEFAULT, auto).
-%% -define(IRB_DEFAULT, {user, timer:seconds(15)}).
+-define(IRB_DEFAULT,        auto).
+%% -define(IRB_DEFAULT,        {user, timer:seconds(15)}).
 
--define(USER_MOD_DEFAULT,  snmpm_user_default).
--define(USER_DATA_DEFAULT, undefined).
+-define(USER_MOD_DEFAULT,   snmpm_user_default).
+-define(USER_DATA_DEFAULT,  undefined).
 
 %% -define(DEF_ADDR_TAG, default_addr_tag).
 -define(DEFAULT_TARGETNAME, default_agent).
--define(DEF_PORT_TAG, default_port_tag).
+-define(DEF_PORT_TAG,       default_port_tag).
+-define(SUPPORTED_DOMAINS,  [transportDomainUdpIpv4, transportDomainUdpIpv6]).
 
 -ifdef(snmp_debug).
 -define(GS_START_LINK(Opts),
@@ -159,6 +163,11 @@
 %%%-------------------------------------------------------------------
 %%% API
 %%%-------------------------------------------------------------------
+
+default_transport_domain() ->
+    transportDomainUdpIpv4.
+
+
 start_link(Opts) -> 
     ?d("start_link -> entry with"
        "~n   Opts: ~p", [Opts]),
@@ -269,9 +278,10 @@ do_user_info(_UserId, BadItem) ->
     error({not_found, BadItem}).
 
 
-%% A target-name constructed in this way is a string with the following 
+%% A target-name constructed in this way is a string with the following: 
 %% <IP-address>:<Port>-<Version>
-%% 
+%% This is intended for backward compatibility and therefor has
+%% only support for IPv4 addresses and *no* other transport domain.
 mk_target_name(Addr0, Port, Config) when is_list(Config) ->
     Version = 
 	case lists:keysearch(version, 1, Config) of
@@ -280,7 +290,6 @@ mk_target_name(Addr0, Port, Config) when is_list(Config) ->
 	    false ->
 		select_lowest_supported_version()
 	end,
-%%     p("mk_target_name -> Version: ~p", [Version]),
     case normalize_address(Addr0) of
 	{A, B, C, D} ->
 	    lists:flatten(
@@ -308,57 +317,99 @@ select_lowest_supported_version([H|T], Versions) ->
     end.
 
 
-register_agent(UserId, _TargetName, _Config) when (UserId =:= user_id) ->
+register_agent(UserId, _TargetName, _Config0) when (UserId =:= user_id) ->
     {error, {bad_user_id, UserId}};
-register_agent(UserId, TargetName, Config) 
+register_agent(UserId, TargetName, Config0) 
   when (is_list(TargetName) andalso 
 	(length(TargetName) > 0) andalso 
-	is_list(Config)) ->
+	is_list(Config0)) ->
 
-%%     p("register_agent -> entry with"
-%%       "~n   UserId:     ~p"
-%%       "~n   TargetName: ~p"
-%%       "~n   Config:     ~p", [UserId, TargetName, Config]),
+    ?vtrace("register_agent -> entry with"
+	    "~n   UserId:     ~p"
+	    "~n   TargetName: ~p"
+	    "~n   Config0:    ~p", [UserId, TargetName, Config0]),
 
     %% Check: 
     %%   1) That the mandatory configs are present
-    %%   2) That the illegal config user_id (used internally) is 
-    %%      not present
+    %%   2) That no illegal config, e.g. user_id (used internally), 
+    %%      is not present
     %%   3) Check that there are no invalid or erroneous configs
-    %%   4) Chack that the manager is capable to use the selected version
-    case verify_agent_config(Config) of
-	ok ->
+    %%   4) Check that the manager is capable of using the selected version
+    case verify_agent_config(Config0) of
+	{ok, Config} ->
 	    call({register_agent, UserId, TargetName, Config});
 	Error ->
 	    Error
     end.
 
 
-verify_agent_config(Conf) ->
-    ok = verify_mandatory(Conf, [engine_id, address, reg_type]),
-    case verify_invalid(Conf, [user_id]) of
-	ok ->
-	    case verify_agent_config2(Conf) of
-		ok ->
-		    {ok, Vsns} = system_info(versions),
-		    Vsn = 
-			case lists:keysearch(version, 1, Conf) of
-			    {value, {version, V}} ->
-				V;
-			    false ->
-				v1
-			end,
-		    case lists:member(Vsn, Vsns) of
-			true ->
-			    ok;
-			false ->
-			    {error, {version_not_supported_by_manager, Vsn, Vsns}}
-		    end
-	    end;
-	Error ->
+verify_agent_config(Conf0) ->
+    try
+	begin
+	    verify_mandatory(Conf0, [engine_id, address, reg_type]),
+	    verify_invalid(Conf0, [user_id]),
+	    Conf = verify_agent_config3(Conf0),
+	    Vsns = versions(),
+	    Vsn  = which_version(Conf),
+	    verify_version(Vsn, Vsns),
+	    {ok, Conf}
+	end
+    catch
+	throw:Error ->
 	    Error
     end.
 
+versions() ->
+    case system_info(versions) of
+	{ok, Vsns} ->
+	    Vsns;
+	{error, _} = ERROR ->
+	    throw(ERROR)
+    end.
+
+which_version(Conf) ->
+    case lists:keysearch(version, 1, Conf) of
+	{value, {version, V}} ->
+	    V;
+	false ->
+	    v1
+    end.
+
+verify_version(Vsn, Vsns) ->
+    case lists:member(Vsn, Vsns) of
+	true ->
+	    ok;
+	false ->
+	    Reason = {version_not_supported_by_manager, Vsn, Vsns}, 
+	    throw({error, Reason})
+    end.
+
+verify_agent_config3(Conf0) ->
+    %% Fix (transport) address and domain
+    {TDomain, Conf1} = 
+	case lists:keysearch(tdomain, 1, Conf0) of
+	    {value, {tdomain, Dom}} ->
+		{Dom, Conf0};
+	    false ->
+		Dom = default_transport_domain(), 
+		{Dom, [{tdomain, Dom} | Conf0]}
+	end,
+    Conf2 = case lists:keysearch(address, 1, Conf1) of
+		{value, {address, Address}} ->
+		    lists:keyreplace(address, 1, Conf1, 
+				     {address, {TDomain, Address}});
+		false ->
+		    %% This is a mandatory config option, 
+		    %% a later test will detect this
+		    Conf1
+	    end,
+    case verify_agent2(Conf2) of
+	{ok, Conf} ->
+	    Conf;
+	{error, _} = ERROR ->
+	    throw(ERROR)
+    end.
+
 verify_agent_config2(Conf) ->
     verify_agent2(Conf).
 
@@ -366,6 +417,7 @@ verify_agent_config2(Conf) ->
 unregister_agent(UserId, TargetName) ->
     call({unregister_agent, UserId, TargetName}).
 
+%% This is the old style agent unregistration (using Addr and Port).
 unregister_agent(UserId, Addr0, Port) ->
     Addr = normalize_address(Addr0),
     case do_agent_info(Addr, Port, target_name) of
@@ -421,17 +473,51 @@ which_agents(UserId) ->
     Agents = ets:match(snmpm_agent_table, Pat),
     [TargetName || [TargetName] <- Agents].
 
-    
-update_agent_info(UserId, TargetName, Item, Val0) 
-  when (Item =/= user_id) ->
-    case (catch verify_val(Item, Val0)) of
-	{ok, Val} ->
-	    call({update_agent_info, UserId, TargetName, Item, Val});
-	Error ->
+
+verify_agent_info(TargetName, Info0) ->
+    try 
+	begin
+	    verify_invalid(Info0, [user_id]), 
+	    %% Check if address is part of the list and
+	    %% if so update it with the domain info. 
+	    Info = 
+		case lists:keysearch(address, 1, Info0) of
+		    {value, {address, Addr}} ->
+			%% If domain is part of the info, then use it.
+			%% If not, lookup what is already stored for 
+			%% this agent and use that.
+			Domain = 
+			    case lists:keysearch(tdomain, 1, Info0) of
+				{value, {tdomain, Dom}} ->
+				    Dom;
+				false ->
+				    {ok, Dom} = 
+					agent_info(TargetName, tdomain),
+				    Dom
+			    end,
+			Addr2 = {Domain, Addr}, 
+			lists:keyreplace(address, 1, Info0, {address, Addr2});
+		    false ->
+			Info0
+		end,
+	    verify_agent2(Info)
+	end
+    catch
+	throw:Error ->
 	    Error
     end.
 
-%% Backward compatibillity
+update_agent_info(UserId, TargetName, Info) ->
+    call({update_agent_info, UserId, TargetName, Info}).
+
+%% <BACKWARD-COMPAT-2>
+%% This is wrapped in the interface module, so this function is
+%% only here to catch code-upgrade problems.
+update_agent_info(UserId, TargetName, Item, Val) ->
+    update_agent_info(UserId, TargetName, [{Item, Val}]).
+%% </BACKWARD-COMPAT-2>
+
+%% <BACKWARD-COMPAT-1>
 update_agent_info(UserId, Addr, Port, Item, Val)  ->
     case agent_info(Addr, Port, target_name) of
 	{ok, TargetName} ->
@@ -439,6 +525,7 @@ update_agent_info(UserId, Addr, Port, Item, Val)  ->
 	Error ->
 	    Error
     end.
+%% </BACKWARD-COMPAT-1>
 
 is_known_engine_id(EngineID, TargetName) ->
     case agent_info(TargetName, engine_id) of
@@ -650,22 +737,14 @@ unregister_usm_user(EngineID, Name)
     call({unregister_usm_user, EngineID, Name}).
 
 verify_usm_user_config(EngineID, Name, Config) ->
-    %%     case verify_mandatory(Config, []) of
-    %% 	ok ->
-    %% 	    case verify_invalid(Config, [engine_id, name]) of
-    %% 		ok ->
-    %% 		    verify_usm_user_config2(EngineID, Name, Config);
-    %% 		Error ->
-    %% 		    Error
-    %% 	    end;
-    %% 	Error ->
-    %% 	    Error
-    %%     end.
-    ok = verify_mandatory(Config, []),
-    case verify_invalid(Config, [engine_id, name]) of
-	ok ->
-	    verify_usm_user_config2(EngineID, Name, Config);
-	Error ->
+    try
+	begin
+	    verify_mandatory(Config, []), 
+	    verify_invalid(Config, [engine_id, name]),
+	    verify_usm_user_config2(EngineID, Name, Config)
+	end
+    catch 
+	throw:Error ->
 	    Error
     end.
 
@@ -1590,6 +1669,7 @@ check_agent_config2(Agent) ->
 	    throw(Err)
     end.
 
+%% For backward compatibility
 check_agent_config({UserId, 
 		    TargetName, 
 		    Community, 
@@ -1597,10 +1677,27 @@ check_agent_config({UserId,
 		    EngineId, 
 		    Timeout, MaxMessageSize, 
 		    Version, SecModel, SecName, SecLevel}) ->
+    TDomain = default_transport_domain(),
+    check_agent_config({UserId, 
+			TargetName, 
+			Community, 
+			TDomain, Ip, Port, 
+			EngineId, 
+			Timeout, MaxMessageSize, 
+			Version, SecModel, SecName, SecLevel});
+
+check_agent_config({UserId, 
+		    TargetName, 
+		    Community, 
+		    TDomain, Ip, Port, 
+		    EngineId, 
+		    Timeout, MaxMessageSize, 
+		    Version, SecModel, SecName, SecLevel}) ->
     ?vtrace("check_agent_config -> entry with"
 	    "~n   UserId:         ~p"
 	    "~n   TargetName:     ~p"
 	    "~n   Community:      ~p"
+	    "~n   TDomain:        ~p"
 	    "~n   Ip:             ~p"
 	    "~n   Port:           ~p"
 	    "~n   EngineId:       ~p"
@@ -1610,15 +1707,16 @@ check_agent_config({UserId,
 	    "~n   SecModel:       ~p"
 	    "~n   SecName:        ~p"
 	    "~n   SecLevel:       ~p", 
-	    [UserId, TargetName, Community, Ip, Port, 
+	    [UserId, TargetName, Community, 
+	     TDomain, Ip, Port, 
 	     EngineId, Timeout, MaxMessageSize, 
 	     Version, SecModel, SecName, SecLevel]),
-    Addr = normalize_address(Ip),
+    Addr = normalize_address(TDomain, Ip),
     ?vtrace("check_agent_config -> Addr: ~p", [Addr]),
     Agent = {UserId, 
 	     TargetName, 
 	     Community, 
-	     Addr, Port, 
+	     TDomain, Addr, Port, 
 	     EngineId, 
 	     Timeout, MaxMessageSize, 
 	     Version, SecModel, SecName, SecLevel},
@@ -1644,6 +1742,7 @@ init_agent_config({UserId, TargetName, Config}) ->
     end.
 
 
+%% For backward compatibility
 verify_agent({UserId, 
 	      TargetName, 
 	      Comm, 
@@ -1651,48 +1750,68 @@ verify_agent({UserId,
 	      EngineId, 
 	      Timeout, MMS, 
 	      Version, SecModel, SecName, SecLevel}) ->
-    ?vtrace("verify_agent -> entry with"
+    TDomain = default_transport_domain(),
+    verify_agent({UserId, 
+		  TargetName, 
+		  Comm, 
+		  TDomain, Ip, Port, 
+		  EngineId, 
+		  Timeout, MMS, 
+		  Version, SecModel, SecName, SecLevel});
+
+verify_agent({UserId, 
+	      TargetName, 
+	      Comm, 
+	      TDomain, Ip, Port, 
+	      EngineId, 
+	      Timeout, MMS, 
+	      Version, SecModel, SecName, SecLevel}) ->
+    ?vdebug("verify_agent -> entry with"
 	    "~n   UserId:     ~p"
 	    "~n   TargetName: ~p", [UserId, TargetName]),
     snmp_conf:check_string(TargetName, {gt, 0}),
-    case verify_val(address, Ip) of
-	{ok, Addr} ->
-	    snmp_conf:check_integer(Port, {gt, 0}),
-	    Conf = 
-		[{reg_type,         target_name},
-		 {address,          Addr},
-		 {port,             Port},
-		 {community,        Comm}, 
-		 {engine_id,        EngineId},
-		 {timeout,          Timeout},
-		 {max_message_size, MMS},
-		 {version,          Version},
-		 {sec_model,        SecModel},
-		 {sec_name,         SecName},
-		 {sec_level,        SecLevel}
-		],
-	    case verify_agent2(Conf) of
-		ok ->
-		    {UserId, TargetName, Conf, Version};
-		Err ->
-		    throw(Err)
-	    end;
-	
-	Error ->
-	    ?vlog("verify_agent -> failed: ~n   ~p", [Error]),
-	    throw(Error)
+    snmp_conf:check_integer(Port, {gt, 0}),
+    %% Note that the order of Conf *is* important.
+    %% Some properties may depend on others, so that
+    %% in order to verify one property, another must
+    %% be already verified (and present). An example 
+    %% of this is the property 'address', for which
+    %% the property tdomain is needed.
+    Conf0 = 
+	[{reg_type,         target_name},
+	 {tdomain,          TDomain}, 
+	 %% This should be taddress, but what the*...
+	 {address,          {TDomain, Ip}},
+	 {port,             Port},
+	 {community,        Comm}, 
+	 {engine_id,        EngineId},
+	 {timeout,          Timeout},
+	 {max_message_size, MMS},
+	 {version,          Version},
+	 {sec_model,        SecModel},
+	 {sec_name,         SecName},
+	 {sec_level,        SecLevel}
+	],
+    case verify_agent2(Conf0) of
+	{ok, Conf} ->
+	    {UserId, TargetName, Conf, Version};
+	Err ->
+	    throw(Err)
     end.
 
-verify_agent2([]) ->
-    ok;
-verify_agent2([{Item, Val}|Items]) ->
-    case verify_val(Item, Val) of
-	{ok, _Val} ->
-	    verify_agent2(Items);
+verify_agent2(Conf) -> 
+    verify_agent2(Conf, []).
+
+verify_agent2([], VerifiedConf) ->
+    {ok, VerifiedConf};
+verify_agent2([{Item, Val0}|Items], VerifiedConf) ->
+    case verify_val(Item, Val0) of
+	{ok, Val} ->
+	    verify_agent2(Items, [{Item, Val} | VerifiedConf]);
 	Err ->
 	    Err
     end;
-verify_agent2([Bad|_]) ->
+verify_agent2([Bad|_], _VerifiedConf) ->
     {error, {bad_agent_config, Bad}}.
 
 
@@ -1708,14 +1827,28 @@ read_users_config_file(Dir) ->
 
 
 check_user_config({Id, Mod, Data}) ->
+    ?vtrace("check_user_config -> entry with"
+	    "~n   Id:   ~p"
+	    "~n   Mod:  ~p"
+	    "~n   Data: ~p", [Id, Mod, Data]),
     check_user_config({Id, Mod, Data, []});
-check_user_config({Id, Mod, _Data, DefaultAgentConfig} = User) 
+check_user_config({Id, Mod, Data, DefaultAgentConfig} = _User) 
   when (Id =/= ?DEFAULT_USER) andalso is_list(DefaultAgentConfig) ->
+    ?vtrace("check_user_config -> entry with"
+	    "~n   Id:                 ~p"
+	    "~n   Mod:                ~p"
+	    "~n   Data:               ~p"
+	    "~n   DefaultAgentConfig: ~p", 
+	    [Id, Mod, Data, DefaultAgentConfig]),
     case (catch verify_user_behaviour(Mod)) of
 	ok ->
+	    ?vtrace("check_user_config -> user behaviour verified", []),
 	    case verify_user_agent_config(DefaultAgentConfig) of
-		ok ->
-	    	    {ok, User};
+		{ok, DefAgentConf} ->
+		    ?vtrace("check_user_config -> "
+			    "user agent (default) config verified", []),
+		    User2 = {Id, Mod, Data, DefAgentConf}, 
+	    	    {ok, User2};
 		{error, Reason} ->
 		    error({bad_default_agent_config, Reason})
 	    end;
@@ -1756,16 +1889,16 @@ verify_user({Id, UserMod, UserData}) ->
 verify_user({Id, UserMod, UserData, DefaultAgentConfig}) 
   when (Id =/= ?DEFAULT_USER) andalso is_list(DefaultAgentConfig) ->
     ?d("verify_user -> entry with"
-       "~n   Id:       ~p"
-       "~n   UserMod:  ~p"
-       "~n   UserData: ~p"
+       "~n   Id:                 ~p"
+       "~n   UserMod:            ~p"
+       "~n   UserData:           ~p"
        "~n   DefaultAgentConfig: ~p", 
        [Id, UserMod, UserData, DefaultAgentConfig]),
     case (catch verify_user_behaviour(UserMod)) of
 	ok ->
 	    case verify_user_agent_config(DefaultAgentConfig) of
-		ok ->
-		    Config = default_agent_config(DefaultAgentConfig),
+		{ok, DefAgentConf} ->
+		    Config = default_agent_config(DefAgentConf),
 		    {ok, #user{id                   = Id, 
 			       mod                  = UserMod, 
 			       data                 = UserData, 
@@ -1783,10 +1916,15 @@ verify_user({Id, _, _, _}) ->
     {error, {bad_user_id, Id}}.
 
 verify_user_agent_config(Conf) ->
-    case verify_invalid(Conf, [user_id, engine_id, address]) of
-	ok ->
-	    verify_agent_config2(Conf);
-	Error ->
+    try
+	begin
+	    verify_invalid(Conf, [user_id, engine_id, address]),
+	    verify_agent_config2(Conf)
+	end
+    catch
+	throw:Error ->
+	    ?vdebug("verify_user_agent_config -> throw"
+		    "~n   Error: ~p", [Error]),
 	    Error
     end.
 
@@ -2147,6 +2285,16 @@ handle_call({unregister_agent, UserId, TargetName}, _From, State) ->
     Reply = handle_unregister_agent(UserId, TargetName),
     {reply, Reply, State};
 
+handle_call({update_agent_info, UserId, TargetName, Info}, 
+	    _From, State) ->
+    ?vlog("received update_agent_info request: "
+	  "~n   UserId:     ~p"
+	  "~n   TargetName: ~p"
+	  "~n   Info:       ~p", [UserId, TargetName, Info]),
+    Reply = handle_update_agent_info(UserId, TargetName, Info),
+    {reply, Reply, State};
+
+%% <BACKWARD-COMPAT>
 handle_call({update_agent_info, UserId, TargetName, Item, Val}, 
 	    _From, State) ->
     ?vlog("received update_agent_info request: "
@@ -2156,6 +2304,7 @@ handle_call({update_agent_info, UserId, TargetName, Item, Val},
 	  "~n   Val:        ~p", [UserId, TargetName, Item, Val]),
     Reply = handle_update_agent_info(UserId, TargetName, Item, Val),
     {reply, Reply, State};
+%% </BACKWARD-COMPAT>
 
 handle_call({register_usm_user, User}, _From, State) ->
     ?vlog("received register_usm_user request: "
@@ -2517,16 +2666,27 @@ handle_register_agent(UserId, TargetName, Config) ->
 	    "~n   Config:     ~p", [UserId, TargetName, Config]),
     case (catch agent_info(TargetName, user_id)) of
 	{error, _} ->
+	    ?vtrace("handle_register_agent -> user_id not found in config", []),
 	    case ets:lookup(snmpm_user_table, UserId) of
 		[#user{default_agent_config = DefConfig}] ->
+		    ?vtrace("handle_register_agent -> "
+			    "~n   DefConfig: ~p", [DefConfig]),
+		    %% First, insert this users default config
+		    ?vtrace("handle_register_agent -> store default config", []),
 		    do_handle_register_agent(TargetName, DefConfig),
+		    %% Second, insert the config for this agent
+		    ?vtrace("handle_register_agent -> store config", []),
 		    do_handle_register_agent(TargetName, 
 					     [{user_id, UserId}|Config]),
 		    %% <DIRTY-BACKWARD-COMPATIBILLITY>
 		    %% And now for some (backward compatibillity) 
 		    %% dirty crossref stuff
+		    ?vtrace("handle_register_agent -> lookup address", []),
 		    {ok, Addr} = agent_info(TargetName, address),
+		    ?vtrace("handle_register_agent -> Addr: ~p, lookup Port", 
+			    [Addr]),
 		    {ok, Port} = agent_info(TargetName, port),
+		    ?vtrace("handle_register_agent -> register cross-ref fix", []),
 		    ets:insert(snmpm_agent_table, 
 			       {{Addr, Port, target_name}, TargetName}),
 		    %% </DIRTY-BACKWARD-COMPATIBILLITY>
@@ -2551,10 +2711,18 @@ handle_register_agent(UserId, TargetName, Config) ->
 do_handle_register_agent(_TargetName, []) ->
     ok;
 do_handle_register_agent(TargetName, [{Item, Val}|Rest]) ->
+    ?vtrace("handle_register_agent -> entry with"
+	    "~n   TargetName: ~p"
+	    "~n   Item:       ~p"
+	    "~n   Val:        ~p"
+	    "~n   Rest:       ~p", [TargetName, Item, Val, Rest]),
     case (catch do_update_agent_info(TargetName, Item, Val)) of
 	ok ->
 	    do_handle_register_agent(TargetName, Rest);
 	{error, Reason} ->
+	    ?vtrace("handle_register_agent -> failed updating ~p"
+		    "~n   Item:   ~p"
+		    "~n   Reason: ~p", [Item, Reason]),
 	    ets:match_delete(snmpm_agent_table, {TargetName, '_'}),
 	    {error, Reason}
     end;
@@ -2589,41 +2757,61 @@ handle_unregister_agent(UserId, TargetName) ->
     end.
 
 
-handle_update_agent_info(UserId, TargetName, Item, Val) ->
+handle_update_agent_info(UserId, TargetName, Info) ->
     ?vdebug("handle_update_agent_info -> entry with"
 	    "~n   UserId:     ~p"
 	    "~n   TargetName: ~p"
-	    "~n   Item:       ~p"
-	    "~n   Val:        ~p", [UserId, TargetName, Item, Val]),
+	    "~n   Info:       ~p", [UserId, TargetName, Info]),
+    %% Verify ownership
     case (catch agent_info(TargetName, user_id)) of
-	{ok, UserId} ->
-	    do_update_agent_info(TargetName, Item, Val);
+	{ok, UserId} -> 
+	    handle_update_agent_info(TargetName, Info);
 	{ok, OtherUserId} ->
 	    {error, {not_owner, OtherUserId}};
 	Error ->
 	    Error
     end.
 
-do_update_agent_info(TargetName, Item, Val0) ->
-%%     p("do_update_agent_info -> entry with"
-%%       "~n   TargetName: ~p"
-%%       "~n   Item:       ~p"
-%%       "~n   Val0:       ~p", [TargetName, Item, Val0]),
-    case verify_val(Item, Val0) of
-	{ok, Val} ->
-%% 	    p("do_update_agent_info -> verified value"
-%% 	      "~n   Val: ~p", [Val]),
-	    ets:insert(snmpm_agent_table, {{TargetName, Item}, Val}),
-	    ok;
+handle_update_agent_info(TargetName, Info0) ->
+    ?vtrace("handle_update_agent_info -> entry with"
+	    "~n   TargetName: ~p"
+	    "~n   Info0:      ~p", [TargetName, Info0]),
+    %% Verify info
+    try verify_agent_info(TargetName, Info0) of
+	{ok, Info} -> 
+	    do_update_agent_info(TargetName, Info);
 	Error ->
-	    ?vlog("do_update_agent_info -> verify value failed: "
-		  "~n   TargetName: ~p"
-		  "~n   Item:       ~p"
-		  "~n   Val0:       ~p"
-		  "~n   Error:      ~p", [TargetName, Item, Val0, Error]),
-	    {error, {bad_agent_val, TargetName, Item, Val0}}
+	    Error
+    catch 
+	throw:Error ->
+	    Error;
+	T:E ->
+	    {error, {failed_info_verification, Info0, T, E}}
     end.
 
+handle_update_agent_info(UserId, TargetName, Item, Val) ->
+    ?vdebug("handle_update_agent_info -> entry with"
+	    "~n   UserId:     ~p"
+	    "~n   TargetName: ~p"
+	    "~n   Item:       ~p"
+	    "~n   Val:        ~p", [UserId, TargetName, Item, Val]),
+    handle_update_agent_info(TargetName, [{Item, Val}]).
+
+do_update_agent_info(TargetName, Info) ->
+    InsertItem = 
+	fun({Item, Val}) -> 
+		ets:insert(snmpm_agent_table, {{TargetName, Item}, Val})
+	end,
+    lists:foreach(InsertItem, Info).
+
+do_update_agent_info(TargetName, Item, Val) ->
+    ?vtrace("do_update_agent_info -> entry with"
+	    "~n   TargetName: ~p"
+	    "~n   Item:       ~p"
+	    "~n   Val:       ~p", [TargetName, Item, Val]),
+    ets:insert(snmpm_agent_table, {{TargetName, Item}, Val}),
+    ok.
+
 
 handle_register_usm_user(#usm_user{engine_id = EngineID, 
 				   name      = Name} = User) ->
@@ -2791,7 +2979,7 @@ verify_mandatory(Conf, [Mand|Mands]) ->
 	true ->
 	    verify_mandatory(Conf, Mands);
 	false ->
-	    {error, {missing_mandatory_config, Mand}}
+	    throw({error, {missing_mandatory_config, Mand}})
     end.
 
 verify_invalid(_, []) ->
@@ -2801,7 +2989,7 @@ verify_invalid(Conf, [Inv|Invs]) ->
 	false ->
 	    verify_invalid(Conf, Invs);
 	true ->
-	    {error, {illegal_config, Inv}}
+	    throw({error, {illegal_config, Inv}})
     end.
 
 
@@ -2810,10 +2998,26 @@ verify_val(user_id, UserId) ->
 verify_val(reg_type, RegType) 
   when (RegType =:= addr_port) orelse (RegType =:= target_name) ->
     {ok, RegType};
-verify_val(address, Addr0) ->
-    case normalize_address(Addr0) of
+verify_val(tdomain = Item, snmpUDPDomain = _Domain) ->
+    verify_val(Item, transportDomainUdpIpv4);
+verify_val(tdomain, Domain) ->
+    case lists:member(Domain, ?SUPPORTED_DOMAINS) of
+	true ->
+	    {ok, Domain};
+	false ->
+	    case lists:member(Domain, snmp_conf:all_domains()) of
+		true ->
+		    error({unsupported_domain, Domain});
+		false ->
+		    error({unknown_domain, Domain})
+	    end
+    end;
+verify_val(address, {Domain, Addr0}) ->
+    case normalize_address(Domain, Addr0) of
 	{_A1, _A2, _A3, _A4} = Addr ->
 	    {ok, Addr};
+	{_A1, _A2, _A3, _A4, _A5, _A6, _A7, _A8} = Addr ->
+	    {ok, Addr};
 	_ when is_list(Addr0) ->
 	    case (catch snmp_conf:check_ip(Addr0)) of
 		ok ->
@@ -2824,6 +3028,8 @@ verify_val(address, Addr0) ->
 	_ ->
 	    error({bad_address, Addr0})
     end;
+verify_val(address, BadAddress) ->
+    error({bad_address, BadAddress});
 verify_val(port, Port) ->
     case (catch snmp_conf:check_integer(Port, {gt, 0})) of
 	ok ->
@@ -2875,7 +3081,7 @@ verify_val(sec_name, BadName) ->
 verify_val(sec_level, Level) ->
     (catch snmp_conf:check_sec_level(Level));
 verify_val(Item, _) ->
-    {error, {no_such_item, Item}}.
+    {error, {unknown_item, Item}}.
 
 
 %%%-------------------------------------------------------------------
@@ -3034,11 +3240,17 @@ init_mini_mib_elems(MibName, [_|T], Res) ->
 %%----------------------------------------------------------------------
 
 normalize_address(Addr) ->
-    case inet:getaddr(Addr, inet) of
+    normalize_address(snmpUDPDomain, Addr).
+
+normalize_address(snmpUDPDomain, Addr) ->
+    normalize_address(transportDomainUdpIpv4, Addr);
+
+normalize_address(Domain, Addr) ->
+    case inet:getaddr(Addr, td2fam(Domain)) of
         {ok, Addr2} ->
             Addr2;
         _ when is_list(Addr) ->
-	    case (catch snmp_conf:check_ip(Addr)) of
+	    case (catch snmp_conf:check_ip(Domain, Addr)) of
 		ok ->
 		    list_to_tuple(Addr);
 		_ ->
@@ -3048,6 +3260,9 @@ normalize_address(Addr) ->
             Addr
     end.
 
+td2fam(transportDomainUdpIpv4) -> inet;
+td2fam(transportDomainUdpIpv6) -> inet6.
+    
 
 %%----------------------------------------------------------------------
 
diff --git a/lib/snmp/src/manager/snmpm_mpd.erl b/lib/snmp/src/manager/snmpm_mpd.erl
index 7712370d28..627838e3d4 100644
--- a/lib/snmp/src/manager/snmpm_mpd.erl
+++ b/lib/snmp/src/manager/snmpm_mpd.erl
@@ -92,7 +92,7 @@ reset(#state{v3 = V3}) ->
 %% Purpose: This is the main Message Dispatching function. (see
 %%          section 4.2.1 in rfc2272)
 %%-----------------------------------------------------------------
-process_msg(Msg, TDomain, Addr, Port, State, NoteStore, Logger) ->
+process_msg(Msg, Domain, Addr, Port, State, NoteStore, Logger) ->
 
     inc(snmpInPkts),
 
@@ -102,18 +102,18 @@ process_msg(Msg, TDomain, Addr, Port, State, NoteStore, Logger) ->
 	#message{version = 'version-1', vsn_hdr = Community, data = Data} 
 	  when State#state.v1 =:= true ->
 	    HS = ?empty_msg_size + length(Community),
-	    process_v1_v2c_msg('version-1', NoteStore, Msg, TDomain, 
-			       Addr, Port, 
+	    process_v1_v2c_msg('version-1', NoteStore, Msg, 
+			       Domain, Addr, Port, 
 			       Community, Data, HS, Logger);
 
 	%% Version 2
 	#message{version = 'version-2', vsn_hdr = Community, data = Data}
 	  when State#state.v2c =:= true ->
 	    HS = ?empty_msg_size + length(Community),
-	    process_v1_v2c_msg('version-2', NoteStore, Msg, TDomain, 
-			       Addr, Port, 
-			       Community, Data, HS, Logger);
-
+	    (catch process_v1_v2c_msg('version-2', NoteStore, Msg, 
+				      Domain, Addr, Port, 
+				      Community, Data, HS, Logger));
+	     
 	%% Version 3
 	#message{version = 'version-3', vsn_hdr = H, data = Data}
 	  when State#state.v3 =:= true ->
@@ -148,17 +148,30 @@ process_msg(Msg, TDomain, Addr, Port, State, NoteStore, Logger) ->
 %%-----------------------------------------------------------------
 %% Handles a Community based message (v1 or v2c).
 %%-----------------------------------------------------------------
-process_v1_v2c_msg(Vsn, _NoteStore, Msg, snmpUDPDomain, 
+process_v1_v2c_msg(Vsn, _NoteStore, Msg, Domain, 
 		   Addr, Port, 
 		   Community, Data, HS, Log) ->
 
     ?vdebug("process_v1_v2c_msg -> entry with"
 	    "~n   Vsn:       ~p"
+	    "~n   Domain:    ~p"
 	    "~n   Addr:      ~p"
 	    "~n   Port:      ~p"
 	    "~n   Community: ~p"
-	    "~n   HS:        ~p", [Vsn, Addr, Port, Community, HS]),
+	    "~n   HS:        ~p", [Vsn, Domain, Addr, Port, Community, HS]),
     
+    {TDomain, TAddress} = 
+	try 
+	    begin
+		TD = snmp_conf:mk_tdomain(Domain), 
+		TA = snmp_conf:mk_taddress(Domain, Addr, Port),
+		{TD, TA}
+	    end
+	catch 
+	    throw:{error, TReason} ->
+		throw({discarded, {badarg, Domain, TReason}})
+	end,
+
     Max      = get_max_message_size(),
     AgentMax = get_agent_max_message_size(Addr, Port),
     PduMS    = pdu_ms(Max, AgentMax, HS),
@@ -170,14 +183,14 @@ process_v1_v2c_msg(Vsn, _NoteStore, Msg, snmpUDPDomain,
 	    ?vtrace("process_v1_v2c_msg -> was a pdu", []),
 	    Log(Msg),
 	    inc_snmp_in(Pdu),
-	    MsgData = {Community, sec_model(Vsn)},
+	    MsgData = {Community, sec_model(Vsn), TDomain, TAddress},
 	    {ok, Vsn, Pdu, PduMS, MsgData};
 
 	Trap when is_record(Trap, trappdu) ->
 	    ?vtrace("process_v1_v2c_msg -> was a trap", []),
 	    Log(Msg),
 	    inc_snmp_in(Trap),
-	    MsgData = {Community, sec_model(Vsn)},
+	    MsgData = {Community, sec_model(Vsn), TDomain, TAddress},
 	    {ok, Vsn, Trap, PduMS, MsgData};
 
 	{'EXIT', Reason} ->
@@ -185,11 +198,7 @@ process_v1_v2c_msg(Vsn, _NoteStore, Msg, snmpUDPDomain,
 		  "~n   Reason: ~p", [Reason]),
 	    inc(snmpInASNParseErrs),
 	    {discarded, Reason}
-    end;
-process_v1_v2c_msg(_Vsn, _NoteStore, _Msg, TDomain, 
-		   _Addr, _Port, 
-		   _Comm, _HS, _Data, _Log) ->
-    {discarded, {badarg, TDomain}}.
+    end.
 
 pdu_ms(MgrMMS, AgentMMS, HS) when AgentMMS < MgrMMS ->
     AgentMMS - HS;
@@ -482,8 +491,8 @@ generate_msg('version-3', NoteStore, Pdu,
     generate_v3_msg(NoteStore, Pdu, 
 		    SecModel, SecName, SecLevel, CtxEngineID, CtxName, 
 		    TargetName, Log);
-generate_msg(Vsn, _NoteStore, Pdu, {Community, _SecModel}, Log) ->
-    generate_v1_v2c_msg(Vsn, Pdu, Community, Log).
+generate_msg(Vsn, _NoteStore, Pdu, {Comm, _SecModel}, Log) ->
+    generate_v1_v2c_msg(Vsn, Pdu, Comm, Log).
 
 
 generate_v3_msg(NoteStore, Pdu, 
@@ -627,6 +636,8 @@ generate_response_msg('version-3', Pdu,
     generate_v3_response_msg(Pdu, MsgID, SecModel, SecName, SecLevel, 
 			     CtxEngineID, CtxName, SecData, Log);
 generate_response_msg(Vsn, Pdu, {Comm, _SecModel}, Log) ->
+    generate_v1_v2c_response_msg(Vsn, Pdu, Comm, Log);
+generate_response_msg(Vsn, Pdu, {Comm, _SecModel, _TDomain, _TAddress}, Log) ->
     generate_v1_v2c_response_msg(Vsn, Pdu, Comm, Log).
 
 
diff --git a/lib/snmp/src/manager/snmpm_net_if.erl b/lib/snmp/src/manager/snmpm_net_if.erl
index a116c9f26b..4d6bd9aa33 100644
--- a/lib/snmp/src/manager/snmpm_net_if.erl
+++ b/lib/snmp/src/manager/snmpm_net_if.erl
@@ -28,7 +28,8 @@
 	 start_link/2, 
 	 stop/1, 
 	 send_pdu/6, % Backward compatibillity
-	 send_pdu/7,
+	 send_pdu/7, % Backward compatibillity
+	 send_pdu/8,
 
 	 inform_response/4, 
 
@@ -101,16 +102,21 @@ stop(Pid) ->
 send_pdu(Pid, Pdu, Vsn, MsgData, Addr, Port) ->
     send_pdu(Pid, Pdu, Vsn, MsgData, Addr, Port, ?DEFAULT_EXTRA_INFO).
 
-send_pdu(Pid, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo) 
+send_pdu(Pid, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo) ->
+    Domain = snmpm_config:default_transport_domain(), 
+    send_pdu(Pid, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo).
+
+send_pdu(Pid, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo) 
   when is_record(Pdu, pdu) ->
     ?d("send_pdu -> entry with"
        "~n   Pid:     ~p"
        "~n   Pdu:     ~p"
        "~n   Vsn:     ~p"
        "~n   MsgData: ~p"
+       "~n   Domain:  ~p"
        "~n   Addr:    ~p"
-       "~n   Port:    ~p", [Pid, Pdu, Vsn, MsgData, Addr, Port]),
-    cast(Pid, {send_pdu, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo}).
+       "~n   Port:    ~p", [Pid, Pdu, Vsn, MsgData, Domain, Addr, Port]),
+    cast(Pid, {send_pdu, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo}).
 
 note_store(Pid, NoteStore) ->
     call(Pid, {note_store, NoteStore}).
@@ -380,15 +386,17 @@ handle_call(Req, From, State) ->
 %%          {noreply, State, Timeout} |
 %%          {stop, Reason, State}            (terminate/2 is called)
 %%--------------------------------------------------------------------
-handle_cast({send_pdu, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo}, State) ->
+handle_cast({send_pdu, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo}, 
+	    State) ->
     ?vlog("received send_pdu message with"
 	  "~n   Pdu:     ~p"
 	  "~n   Vsn:     ~p"
 	  "~n   MsgData: ~p"
+	  "~n   Domain:  ~p"
 	  "~n   Addr:    ~p"
-	  "~n   Port:    ~p", [Pdu, Vsn, MsgData, Addr, Port]),
+	  "~n   Port:    ~p", [Pdu, Vsn, MsgData, Domain, Addr, Port]),
     maybe_process_extra_info(ExtraInfo), 
-    maybe_handle_send_pdu(Pdu, Vsn, MsgData, Addr, Port, State), 
+    maybe_handle_send_pdu(Pdu, Vsn, MsgData, Domain, Addr, Port, State), 
     {noreply, State};
 
 handle_cast({inform_response, Ref, Addr, Port}, State) ->
@@ -545,8 +553,9 @@ handle_recv_msg(Addr, Port, Bytes,
 		       mpd_state  = MpdState, 
 		       sock       = Sock,
 		       log        = Log} = State) ->
+    Domain = snmp_conf:which_domain(Addr), % What the ****...
     Logger = logger(Log, read, Addr, Port),
-    case (catch snmpm_mpd:process_msg(Bytes, snmpUDPDomain, Addr, Port, 
+    case (catch snmpm_mpd:process_msg(Bytes, Domain, Addr, Port, 
 				      MpdState, NoteStore, Logger)) of
 
 	{ok, Vsn, Pdu, MS, ACM} ->
@@ -734,17 +743,17 @@ irgc_stop(Ref) ->
     (catch erlang:cancel_timer(Ref)).
 
 
-maybe_handle_send_pdu(Pdu, Vsn, MsgData, Addr, Port, 
+maybe_handle_send_pdu(Pdu, Vsn, MsgData, Domain, Addr, Port, 
 		      #state{filter = FilterMod} = State) ->
     case (catch FilterMod:accept_send_pdu(Addr, Port, pdu_type_of(Pdu))) of
 	false ->
 	    inc(netIfPduOutDrops),
 	    ok;
 	_ ->
-	    handle_send_pdu(Pdu, Vsn, MsgData, Addr, Port, State)
+	    handle_send_pdu(Pdu, Vsn, MsgData, Domain, Addr, Port, State)
     end.
 
-handle_send_pdu(Pdu, Vsn, MsgData, Addr, Port, 
+handle_send_pdu(Pdu, Vsn, MsgData, _Domain, Addr, Port, 
 		#state{server     = Pid, 
 		       note_store = NoteStore, 
 		       sock       = Sock, 
diff --git a/lib/snmp/src/manager/snmpm_server.erl b/lib/snmp/src/manager/snmpm_server.erl
index 58a58507d6..484954addb 100644
--- a/lib/snmp/src/manager/snmpm_server.erl
+++ b/lib/snmp/src/manager/snmpm_server.erl
@@ -161,7 +161,8 @@
 	{id, 
 	 user_id,
 	 reg_type,
-	 target, 
+	 target,
+	 domain,
 	 addr, 
 	 port, 
 	 type, 
@@ -1175,11 +1176,12 @@ handle_sync_get(Pid, UserId, TargetName, Oids, SendOpts, From, State) ->
 	    "~n   From:       ~p", 
 	    [Pid, UserId, TargetName, Oids, SendOpts, From]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_sync_get -> send a ~p message", [Vsn]),
 	    Extra   = ?GET_EXTRA(SendOpts), 
 	    ReqId   = send_get_request(Oids, Vsn, MsgData, 
-				       Addr, Port, Extra, State),
+				       Domain, Addr, Port, 
+				       Extra, State),
 	    ?vdebug("handle_sync_get -> ReqId: ~p", [ReqId]),
 	    Msg     = {sync_timeout, ReqId, From},
 	    Timeout = ?SYNC_GET_TIMEOUT(SendOpts), 
@@ -1190,6 +1192,7 @@ handle_sync_get(Pid, UserId, TargetName, Oids, SendOpts, From, State) ->
 			       user_id  = UserId, 
 			       reg_type = RegType, 
 			       target   = TargetName, 
+			       domain   = Domain, 
 			       addr     = Addr,
 			       port     = Port,
 			       type     = get, 
@@ -1227,11 +1230,12 @@ handle_sync_get_next(Pid, UserId, TargetName, Oids, SendOpts,
 	    "~n   From:       ~p", 
 	    [Pid, UserId, TargetName, Oids, SendOpts, From]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_sync_get_next -> send a ~p message", [Vsn]),
 	    Extra   = ?GET_EXTRA(SendOpts), 
 	    ReqId   = send_get_next_request(Oids, Vsn, MsgData, 
-					    Addr, Port, Extra, State),
+					    Domain, Addr, Port, 
+					    Extra, State),
 	    ?vdebug("handle_sync_get_next -> ReqId: ~p", [ReqId]),
 	    Msg     = {sync_timeout, ReqId, From},
 	    Timeout = ?SYNC_GET_NEXT_TIMEOUT(SendOpts), 
@@ -1242,6 +1246,7 @@ handle_sync_get_next(Pid, UserId, TargetName, Oids, SendOpts,
 			       user_id  = UserId, 
 			       reg_type = RegType, 
 			       target   = TargetName, 
+			       domain   = Domain, 
 			       addr     = Addr,
 			       port     = Port,
 			       type     = get_next, 
@@ -1285,10 +1290,11 @@ handle_sync_get_bulk(Pid, UserId, TargetName, NonRep, MaxRep, Oids, SendOpts,
 	    "~n   From:       ~p", 
 	    [Pid, UserId, TargetName, NonRep, MaxRep, Oids, SendOpts, From]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_sync_get_bulk -> send a ~p message", [Vsn]),
 	    Extra   = ?GET_EXTRA(SendOpts), 
-	    ReqId   = send_get_bulk_request(Oids, Vsn, MsgData, Addr, Port, 
+	    ReqId   = send_get_bulk_request(Oids, Vsn, MsgData, 
+					    Domain, Addr, Port, 
 					    NonRep, MaxRep, Extra, State),
 	    ?vdebug("handle_sync_get_bulk -> ReqId: ~p", [ReqId]),
 	    Msg     = {sync_timeout, ReqId, From},
@@ -1300,6 +1306,7 @@ handle_sync_get_bulk(Pid, UserId, TargetName, NonRep, MaxRep, Oids, SendOpts,
 			       user_id  = UserId, 
 			       reg_type = RegType, 
 			       target   = TargetName, 
+			       domain   = Domain, 
 			       addr     = Addr,
 			       port     = Port,
 			       type     = get_bulk, 
@@ -1339,11 +1346,12 @@ handle_sync_set(Pid, UserId, TargetName, VarsAndVals, SendOpts, From, State) ->
 	    "~n   From:        ~p", 
 	    [Pid, UserId, TargetName, VarsAndVals, From]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_sync_set -> send a ~p message", [Vsn]),
 	    Extra   = ?GET_EXTRA(SendOpts), 
 	    ReqId   = send_set_request(VarsAndVals, Vsn, MsgData, 
-				       Addr, Port, Extra, State),
+				       Domain, Addr, Port, 
+				       Extra, State),
 	    ?vdebug("handle_sync_set -> ReqId: ~p", [ReqId]),
 	    Msg     = {sync_timeout, ReqId, From},
 	    Timeout = ?SYNC_SET_TIMEOUT(SendOpts), 
@@ -1354,6 +1362,7 @@ handle_sync_set(Pid, UserId, TargetName, VarsAndVals, SendOpts, From, State) ->
 			       user_id  = UserId, 
 			       reg_type = RegType, 
 			       target   = TargetName, 
+			       domain   = Domain, 
 			       addr     = Addr,
 			       port     = Port,
 			       type     = set, 
@@ -1391,10 +1400,11 @@ handle_async_get(Pid, UserId, TargetName, Oids, SendOpts, State) ->
 	    "~n   SendOpts:   ~p",
 	    [Pid, UserId, TargetName, Oids, SendOpts]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_async_get -> send a ~p message", [Vsn]),
 	    Extra  = ?GET_EXTRA(SendOpts), 
-	    ReqId  = send_get_request(Oids, Vsn, MsgData, Addr, Port, 
+	    ReqId  = send_get_request(Oids, Vsn, MsgData, 
+				      Domain, Addr, Port, 
 				      Extra, State),
 	    ?vdebug("handle_async_get -> ReqId: ~p", [ReqId]),
 	    Expire = ?ASYNC_GET_TIMEOUT(SendOpts), 
@@ -1402,6 +1412,7 @@ handle_async_get(Pid, UserId, TargetName, Oids, SendOpts, State) ->
 			      user_id  = UserId, 
 			      reg_type = RegType, 
 			      target   = TargetName, 
+			      domain   = Domain, 
 			      addr     = Addr,
 			      port     = Port,
 			      type     = get, 
@@ -1439,17 +1450,19 @@ handle_async_get_next(Pid, UserId, TargetName, Oids, SendOpts, State) ->
 	    "~n   SendOpts:   ~p",
 	    [Pid, UserId, TargetName, Oids, SendOpts]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_async_get_next -> send a ~p message", [Vsn]),
 	    Extra  = ?GET_EXTRA(SendOpts), 
 	    ReqId  = send_get_next_request(Oids, Vsn, MsgData, 
-					   Addr, Port, Extra, State),
+					   Domain, Addr, Port, 
+					   Extra, State),
 	    ?vdebug("handle_async_get_next -> ReqId: ~p", [ReqId]),
 	    Expire = ?ASYNC_GET_NEXT_TIMEOUT(SendOpts), 
 	    Req    = #request{id       = ReqId,
 			      user_id  = UserId, 
 			      reg_type = RegType, 
 			      target   = TargetName, 
+			      domain   = Domain, 
 			      addr     = Addr,
 			      port     = Port,
 			      type     = get_next, 
@@ -1494,10 +1507,11 @@ handle_async_get_bulk(Pid,
 	    "~n   SendOpts:   ~p", 
 	    [Pid, UserId, TargetName, NonRep, MaxRep, Oids, SendOpts]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_async_get_bulk -> send a ~p message", [Vsn]),
 	    Extra  = ?GET_EXTRA(SendOpts), 
-	    ReqId  = send_get_bulk_request(Oids, Vsn, MsgData, Addr, Port, 
+	    ReqId  = send_get_bulk_request(Oids, Vsn, MsgData, 
+					   Domain, Addr, Port, 
 					   NonRep, MaxRep, Extra, State),
 	    ?vdebug("handle_async_get_bulk -> ReqId: ~p", [ReqId]),
 	    Expire = ?ASYNC_GET_BULK_TIMEOUT(SendOpts), 
@@ -1505,6 +1519,7 @@ handle_async_get_bulk(Pid,
 			      user_id  = UserId, 
 			      reg_type = RegType, 
 			      target   = TargetName, 
+			      domain   = Domain, 
 			      addr     = Addr,
 			      port     = Port,
 			      type     = get_bulk, 
@@ -1541,17 +1556,19 @@ handle_async_set(Pid, UserId, TargetName, VarsAndVals, SendOpts, State) ->
 	    "~n   SendOpts:    ~p",
 	    [Pid, UserId, TargetName, VarsAndVals, SendOpts]),
     case agent_data(TargetName, SendOpts) of
-	{ok, RegType, Addr, Port, Vsn, MsgData} ->
+	{ok, RegType, Domain, Addr, Port, Vsn, MsgData} ->
 	    ?vtrace("handle_async_set -> send a ~p message", [Vsn]),
 	    Extra  = ?GET_EXTRA(SendOpts), 
 	    ReqId  = send_set_request(VarsAndVals, Vsn, MsgData, 
-				      Addr, Port, Extra, State),
+				      Domain, Addr, Port, 
+				      Extra, State),
 	    ?vdebug("handle_async_set -> ReqId: ~p", [ReqId]),
 	    Expire = ?ASYNC_SET_TIMEOUT(SendOpts), 
 	    Req    = #request{id       = ReqId,
 			      user_id  = UserId, 
 			      reg_type = RegType, 
 			      target   = TargetName, 
+			      domain   = Domain, 
 			      addr     = Addr,
 			      port     = Port,
 			      type     = set, 
@@ -2907,7 +2924,7 @@ do_gc(Key, Now) ->
 %% 
 %%----------------------------------------------------------------------
 
-send_get_request(Oids, Vsn, MsgData, Addr, Port, ExtraInfo, 
+send_get_request(Oids, Vsn, MsgData, Domain, Addr, Port, ExtraInfo, 
 		 #state{net_if     = NetIf, 
 			net_if_mod = Mod,
 			mini_mib   = MiniMIB}) ->
@@ -2918,34 +2935,39 @@ send_get_request(Oids, Vsn, MsgData, Addr, Port, ExtraInfo,
 	    "~n   Pdu:     ~p"
 	    "~n   Vsn:     ~p"
 	    "~n   MsgData: ~p"
+	    "~n   Domain:  ~p"
 	    "~n   Addr:    ~p"
-	    "~n   Port:    ~p", [Mod, NetIf, Pdu, Vsn, MsgData, Addr, Port]),
-    (catch Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo)),
+	    "~n   Port:    ~p", 
+	    [Mod, NetIf, Pdu, Vsn, MsgData, Domain, Addr, Port]),
+    Res = (catch Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, 
+			      Domain, Addr, Port, ExtraInfo)),
+    ?vtrace("send_get_request -> send result:"
+	    "~n   ~p", [Res]),
     Pdu#pdu.request_id.
 
-send_get_next_request(Oids, Vsn, MsgData, Addr, Port, ExtraInfo, 
+send_get_next_request(Oids, Vsn, MsgData, Domain, Addr, Port, ExtraInfo, 
 		      #state{mini_mib   = MiniMIB, 
 			     net_if     = NetIf, 
 			     net_if_mod = Mod}) ->
     Pdu = make_pdu(get_next, Oids, MiniMIB),
-    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo),
+    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo),
     Pdu#pdu.request_id.
 
-send_get_bulk_request(Oids, Vsn, MsgData, Addr, Port, 
+send_get_bulk_request(Oids, Vsn, MsgData, Domain, Addr, Port, 
 		      NonRep, MaxRep, ExtraInfo, 
 		      #state{mini_mib   = MiniMIB, 
 			     net_if     = NetIf, 
 			     net_if_mod = Mod}) ->
     Pdu = make_pdu(bulk, {NonRep, MaxRep, Oids}, MiniMIB),
-    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo),
+    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo),
     Pdu#pdu.request_id.
 
-send_set_request(VarsAndVals, Vsn, MsgData, Addr, Port, ExtraInfo, 
+send_set_request(VarsAndVals, Vsn, MsgData, Domain, Addr, Port, ExtraInfo, 
 		 #state{mini_mib   = MiniMIB,
 			net_if     = NetIf, 
 			net_if_mod = Mod}) ->
     Pdu = make_pdu(set, VarsAndVals, MiniMIB),
-    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Addr, Port, ExtraInfo),
+    Mod:send_pdu(NetIf, Pdu, Vsn, MsgData, Domain, Addr, Port, ExtraInfo),
     Pdu#pdu.request_id.
 
 %% send_discovery(Vsn, MsgData, Addr, Port, ExtraInfo, 
@@ -3181,10 +3203,11 @@ agent_data(TargetName, SendOpts) ->
 			
 			{Comm, SecModel}
 		end,
+	    Domain  = agent_data_item(tdomain,  Info),
 	    Addr    = agent_data_item(address,  Info),
 	    Port    = agent_data_item(port,     Info),
 	    RegType = agent_data_item(reg_type, Info),
-	    {ok, RegType, Addr, Port, version(Version), MsgData};
+	    {ok, RegType, Domain, Addr, Port, version(Version), MsgData};
 	Error ->
 	    Error
     end.
diff --git a/lib/snmp/src/misc/snmp_conf.erl b/lib/snmp/src/misc/snmp_conf.erl
index 20f4455d10..7249def24e 100644
--- a/lib/snmp/src/misc/snmp_conf.erl
+++ b/lib/snmp/src/misc/snmp_conf.erl
@@ -37,7 +37,9 @@
 
 	 check_timer/1,
 
+	 all_domains/0, 
 	 check_domain/1, 
+	 all_tdomains/0, 
 	 check_tdomain/1,  
 	 mk_tdomain/1, 
 	 which_domain/1, 
@@ -345,6 +347,25 @@ check_sec_level(BadSecLevel) ->
 
 
 %% ---------
+all_tdomains() ->
+    [
+     ?transportDomainUdpIpv4, 
+     ?transportDomainUdpIpv6, 
+     ?transportDomainUdpIpv4z, 
+     ?transportDomainUdpIpv6z, 
+     ?transportDomainTcpIpv4, 
+     ?transportDomainTcpIpv6, 
+     ?transportDomainTcpIpv4z, 
+     ?transportDomainTcpIpv6z, 
+     ?transportDomainSctpIpv4, 
+     ?transportDomainSctpIpv6, 
+     ?transportDomainSctpIpv4z, 
+     ?transportDomainSctpIpv6z, 
+     ?transportDomainLocal, 
+     ?transportDomainUdpDns, 
+     ?transportDomainTcpDns,
+     ?transportDomainSctpDns
+    ].
 
 check_tdomain(TDomain) ->
     SupportedTDomains = 
@@ -353,25 +374,7 @@ check_tdomain(TDomain) ->
 	 ?transportDomainUdpIpv4,
 	 ?transportDomainUdpIpv6			 
 	],
-    AllTDomains = 
-	[
-	 ?transportDomainUdpIpv4, 
-	 ?transportDomainUdpIpv6, 
-	 ?transportDomainUdpIpv4z, 
-	 ?transportDomainUdpIpv6z, 
-	 ?transportDomainTcpIpv4, 
-	 ?transportDomainTcpIpv6, 
-	 ?transportDomainTcpIpv4z, 
-	 ?transportDomainTcpIpv6z, 
-	 ?transportDomainSctpIpv4, 
-	 ?transportDomainSctpIpv6, 
-	 ?transportDomainSctpIpv4z, 
-	 ?transportDomainSctpIpv6z, 
-	 ?transportDomainLocal, 
-	 ?transportDomainUdpDns, 
-	 ?transportDomainTcpDns,
-	 ?transportDomainSctpDns
-	],
+    AllTDomains = all_tdomains(), 
     case lists:member(TDomain, SupportedTDomains) of
 	true ->
 	    ok;
@@ -388,7 +391,7 @@ check_tdomain(TDomain) ->
 %% ---------
 
 mk_tdomain(snmpUDPDomain) ->
-    ?snmpUDPDomain;
+    mk_tdomain(transportDomainUdpIpv4);
 mk_tdomain(transportDomainUdpIpv4) ->
     ?transportDomainUdpIpv4;
 mk_tdomain(transportDomainUdpIpv6) ->
@@ -474,6 +477,26 @@ do_check_timer(WaitFor, Factor, Incr, Retry) ->
 
 %% ---------
 
+all_domains() ->
+    [
+     transportDomainUdpIpv4, 
+     transportDomainUdpIpv6, 
+     transportDomainUdpIpv4z, 
+     transportDomainUdpIpv6z, 
+     transportDomainTcpIpv4, 
+     transportDomainTcpIpv6, 
+     transportDomainTcpIpv4z, 
+     transportDomainTcpIpv6z, 
+     transportDomainSctpIpv4, 
+     transportDomainSctpIpv6, 
+     transportDomainSctpIpv4z, 
+     transportDomainSctpIpv6z, 
+     transportDomainLocal, 
+     transportDomainUdpDns, 
+     transportDomainTcpDns,
+     transportDomainSctpDns
+    ].
+
 check_domain(Domain) ->
     SupportedDomains = 
 	[
@@ -481,25 +504,7 @@ check_domain(Domain) ->
 	 transportDomainUdpIpv4,
 	 transportDomainUdpIpv6
 	],
-    AllDomains = 
-	[
-	 transportDomainUdpIpv4, 
-	 transportDomainUdpIpv6, 
-	 transportDomainUdpIpv4z, 
-	 transportDomainUdpIpv6z, 
-	 transportDomainTcpIpv4, 
-	 transportDomainTcpIpv6, 
-	 transportDomainTcpIpv4z, 
-	 transportDomainTcpIpv6z, 
-	 transportDomainSctpIpv4, 
-	 transportDomainSctpIpv6, 
-	 transportDomainSctpIpv4z, 
-	 transportDomainSctpIpv6z, 
-	 transportDomainLocal, 
-	 transportDomainUdpDns, 
-	 transportDomainTcpDns,
-	 transportDomainSctpDns
-	],
+    AllDomains = all_domains(), 
     case lists:member(Domain, SupportedDomains) of
 	true ->
 	    ok;
diff --git a/lib/snmp/src/misc/snmp_config.erl b/lib/snmp/src/misc/snmp_config.erl
index fcbc6a88c9..6ab20e3e48 100644
--- a/lib/snmp/src/misc/snmp_config.erl
+++ b/lib/snmp/src/misc/snmp_config.erl
@@ -337,7 +337,7 @@ config_agent_sys() ->
 						{dir,    ATLDir},
 						{size,   ATLSize},
 						{repair, ATLRepair},
-						{seqno, ATLSeqNo}]}];
+						{seqno,  ATLSeqNo}]}];
 			no ->
 			    []
 		    end,
@@ -568,7 +568,7 @@ config_agent_snmp(Dir, Vsns) ->
 	       false ->
 		   ok
 	   end,
-	   i("The following agent files were written: agent.conf, "
+	   i("The following agent files where written: agent.conf, "
 	     "community.conf,~n"
 	     "standard.conf, target_addr.conf, "
 	     "target_params.conf, ~n"
@@ -776,7 +776,7 @@ config_manager_snmp(Dir, Vsns) ->
 					 Users, Agents, Usms)) of
 	ok ->
 	   i("~n- - - - - - - - - - - - -"),
-	   i("The following manager files were written: "
+	   i("The following manager files where written: "
 	     "manager.conf, agents.conf " ++ 
 	     case lists:member(v3, Vsns) of
 		 true ->
@@ -2350,7 +2350,9 @@ write_sys_config_file_manager_atl_opt(Fid, {type, Type}) ->
 write_sys_config_file_manager_atl_opt(Fid, {size, Size}) ->
     ok = io:format(Fid, "{size, ~w}", [Size]);
 write_sys_config_file_manager_atl_opt(Fid, {repair, Rep}) ->
-    ok = io:format(Fid, "{repair, ~w}", [Rep]).
+    ok = io:format(Fid, "{repair, ~w}", [Rep]);
+write_sys_config_file_manager_atl_opt(Fid, {seqno, SeqNo}) ->
+    ok = io:format(Fid, "{seqno, ~w}", [SeqNo]).
 
 
 header() ->
diff --git a/lib/snmp/test/snmp_compiler_test.erl b/lib/snmp/test/snmp_compiler_test.erl
index 2e6020ae7a..cee11ba97a 100644
--- a/lib/snmp/test/snmp_compiler_test.erl
+++ b/lib/snmp/test/snmp_compiler_test.erl
@@ -47,6 +47,7 @@
 	 module_identity/1,
 	 agent_capabilities/1,
 	 module_compliance/1, 
+	 warnings_as_errors/1, 
 
 	 otp_6150/1,
 	 otp_8574/1, 
@@ -97,9 +98,10 @@ all() ->
      description, 
      oid_conflicts, 
      imports, 
-     module_identity,
-     agent_capabilities,
-     module_compliance,
+     module_identity, 
+     agent_capabilities, 
+     module_compliance, 
+     warnings_as_errors, 
      {group, tickets}
     ].
 
@@ -152,6 +154,8 @@ description(Config) when is_list(Config) ->
     ok.
 
 
+%%======================================================================
+
 oid_conflicts(suite) -> [];
 oid_conflicts(Config) when is_list(Config) ->
     put(tname,oid_conflicts),
@@ -165,18 +169,24 @@ oid_conflicts(Config) when is_list(Config) ->
     ok.
 
 
+%%======================================================================
+
 imports(suite) ->
     [];
 imports(Config) when is_list(Config) ->
     ?SKIP(not_yet_implemented).
 
 
+%%======================================================================
+
 module_identity(suite) ->
     [];
 module_identity(Config) when is_list(Config) ->
     ?SKIP(not_yet_implemented).
 
 
+%%======================================================================
+
 agent_capabilities(suite) ->
     [];
 agent_capabilities(Config) when is_list(Config) ->
@@ -218,6 +228,8 @@ agent_capabilities(Config) when is_list(Config) ->
     ok.
 
 
+%%======================================================================
+
 module_compliance(suite) ->
     [];
 module_compliance(Config) when is_list(Config) ->
@@ -259,6 +271,31 @@ module_compliance(Config) when is_list(Config) ->
     ok.
 
 
+%%======================================================================
+
+warnings_as_errors(suite) ->
+    ["OTP-9437"];
+warnings_as_errors(Config) when is_list(Config) ->
+    put(tname,warnings_as_errors),
+    p("starting with Config: ~p~n", [Config]),
+    Dir     = ?config(comp_dir, Config),
+    MibDir  = ?config(mib_dir,  Config),
+    MibFile = join(MibDir, "OTP8574-MIB.mib"),
+    OutFile = join(Dir, "OTP8574-MIB.bin"),
+    Opts =  [{group_check, false}, 
+	     {outdir,      Dir}, 
+	     {verbosity,   trace},
+	     relaxed_row_name_assign_check],
+    {error, compilation_failed} =
+	snmpc:compile(MibFile, [warnings_as_errors|Opts]),
+    false = filelib:is_regular(OutFile),
+    {ok, _} = snmpc:compile(MibFile, Opts),
+    true = filelib:is_regular(OutFile),
+    ok.
+
+
+%%======================================================================
+
 otp_6150(suite) ->
     [];
 otp_6150(Config) when is_list(Config) ->
@@ -273,6 +310,8 @@ otp_6150(Config) when is_list(Config) ->
     ok.
 
 
+%%======================================================================
+
 otp_8574(suite) ->
     [];
 otp_8574(Config) when is_list(Config) ->
@@ -304,6 +343,8 @@ otp_8574(Config) when is_list(Config) ->
     end.
 
 
+%%======================================================================
+
 otp_8595(suite) ->
     [];
 otp_8595(Config) when is_list(Config) ->
diff --git a/lib/snmp/test/snmp_manager_test.erl b/lib/snmp/test/snmp_manager_test.erl
index 0b536748fb..d18f20d359 100644
--- a/lib/snmp/test/snmp_manager_test.erl
+++ b/lib/snmp/test/snmp_manager_test.erl
@@ -61,6 +61,7 @@
 	
 	 register_agent1/1,
 	 register_agent2/1,
+	 register_agent3/1,
 
 	 info/1,
 	 
@@ -383,12 +384,12 @@ end_per_testcase2(Case, Config) ->
 all() -> 
     [
      {group, start_and_stop_tests}, 
-     {group, misc_tests},
+     {group, misc_tests}, 
      {group, user_tests}, 
-     {group, agent_tests},
+     {group, agent_tests}, 
      {group, request_tests}, 
      {group, event_tests}, 
-     discovery,
+     discovery, 
      {group, tickets}
     ].
 
@@ -417,7 +418,8 @@ groups() ->
      {agent_tests, [], 
       [
        register_agent1, 
-       register_agent2
+       register_agent2, 
+       register_agent3
       ]
      },
      {request_tests, [],
@@ -477,14 +479,14 @@ groups() ->
       },
       {event_tests, [],
        [
-	trap1, 
-        trap2, 
-        inform1, 
-        inform2, 
-        inform3, 
-        inform4,
-        inform_swarm, 
-        report
+	trap1%% , 
+        %% trap2, 
+        %% inform1, 
+        %% inform2, 
+        %% inform3, 
+        %% inform4,
+        %% inform_swarm, 
+        %% report
        ]
       },
      {tickets, [], 
@@ -1134,6 +1136,7 @@ register_agent1(suite) ->
 register_agent1(Config) when is_list(Config) ->
     process_flag(trap_exit, true),
     put(tname,ra1),
+    
     p("starting with Config: ~p~n", [Config]),
 
     ManagerNode = start_manager_node(), 
@@ -1164,7 +1167,7 @@ register_agent1(Config) when is_list(Config) ->
 
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
 
-    p("register user(s) calvin & hobbe"),
+    p("register user(s) user_alfa & user_beta"),
     ?line ok = mgr_register_user(ManagerNode, user_alfa, snmpm_user_default, []),
     ?line ok = mgr_register_user(ManagerNode, user_beta, snmpm_user_default, []),
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
@@ -1293,7 +1296,7 @@ register_agent2(Config) when is_list(Config) ->
 
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
 
-    p("register user(s) calvin & hobbe"),
+    p("register user(s) user_alfa & user_beta"),
     ?line ok = mgr_register_user(ManagerNode, user_alfa, snmpm_user_default, []),
     ?line ok = mgr_register_user(ManagerNode, user_beta, snmpm_user_default, []),
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
@@ -1348,7 +1351,7 @@ register_agent2(Config) when is_list(Config) ->
     end,
 
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
-    
+
     p("unregister user user_alfa"),
     ?line ok = mgr_unregister_user(ManagerNode, user_alfa),
 
@@ -1377,7 +1380,157 @@ register_agent2(Config) when is_list(Config) ->
 
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
 
-    p("unregister user hobbe"),
+    p("unregister user user_beta"),
+    ?line ok = mgr_unregister_user(ManagerNode, user_beta),
+
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    ?SLEEP(1000),
+
+    p("stop snmp application (with only manager)"),
+    ?line ok = stop_snmp(ManagerNode),
+
+    ?SLEEP(1000),
+
+    stop_node(ManagerNode),
+
+    ?SLEEP(1000),
+
+    p("end"),
+    ok.
+
+
+%%======================================================================
+
+register_agent3(doc) -> 
+    ["Test registration of agents with the NEW interface functions "
+     "and specifying transport domain"];
+register_agent3(suite) -> 
+    [];
+register_agent3(Config) when is_list(Config) ->
+    process_flag(trap_exit, true),
+    put(tname, ra3),
+    p("starting with Config: ~p~n", [Config]),
+
+    ManagerNode = start_manager_node(), 
+
+    ConfDir = ?config(manager_conf_dir, Config),
+    DbDir   = ?config(manager_db_dir, Config),
+    LocalHost = snmp_test_lib:localhost(), 
+
+
+    write_manager_conf(ConfDir),
+
+    Opts = [{server,     [{verbosity, trace}]},
+	    {net_if,     [{verbosity, trace}]},
+	    {note_store, [{verbosity, trace}]},
+	    {config, [{verbosity, trace}, {dir, ConfDir}, {db_dir, DbDir}]}],
+
+
+    p("load snmp application"),
+    ?line ok = load_snmp(ManagerNode),
+
+    p("set manager env for the snmp application"),
+    ?line ok = set_mgr_env(ManagerNode, Opts),
+
+    p("starting snmp application (with only manager)"),
+    ?line ok = start_snmp(ManagerNode),
+
+    p("started"),
+
+    ?SLEEP(1000),
+
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    p("register user(s) user_alfa & user_beta"),
+    ?line ok = mgr_register_user(ManagerNode, user_alfa, snmpm_user_default, []),
+    ?line ok = mgr_register_user(ManagerNode, user_beta, snmpm_user_default, []),
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    p("register agent(s)"),
+    TargetName1 = "agent2", 
+    ?line ok = mgr_register_agent(ManagerNode, user_alfa, TargetName1, 
+				  [{tdomain,   transportDomainUdpIpv4},
+				   {address,   LocalHost},
+				   {port,      5001},
+				   {engine_id, "agentEngineId-1"}]),
+    TargetName2 = "agent3", 
+    ?line ok = mgr_register_agent(ManagerNode, user_alfa, TargetName2,
+				  [{tdomain,   transportDomainUdpIpv6},
+				   {address,   LocalHost},
+				   {port,      5002},
+				   {engine_id, "agentEngineId-2"}]),
+    TargetName3 = "agent4", 
+    ?line {error, {unsupported_domain, _} = Reason4} = 
+	mgr_register_agent(ManagerNode, user_beta, TargetName3,
+			   [{tdomain,   transportDomainTcpIpv4},
+			    {address,   LocalHost},
+			    {port,      5003},
+			    {engine_id, "agentEngineId-3"}]),
+    p("Expected registration failure: ~p", [Reason4]),
+    TargetName4 = "agent5", 
+    ?line {error, {unknown_domain, _} = Reason5} = 
+	mgr_register_agent(ManagerNode, user_beta, TargetName4,
+			   [{tdomain,   transportDomainUdpIpv4_bad},
+			    {address,   LocalHost},
+			    {port,      5004},
+			    {engine_id, "agentEngineId-4"}]),
+    p("Expected registration failure: ~p", [Reason5]),
+
+    p("verify all agent(s): expect 2"),
+    case mgr_which_agents(ManagerNode) of
+	Agents1 when length(Agents1) =:= 2 ->
+	    p("all agents: ~p~n", [Agents1]),
+	    ok;
+	Agents1 ->
+	    ?FAIL({agent_registration_failure, Agents1})
+    end,
+
+    p("verify user_alfa agent(s)"),
+    case mgr_which_agents(ManagerNode, user_alfa) of
+	Agents2 when length(Agents2) =:= 2 ->
+	    p("calvin agents: ~p~n", [Agents2]),
+	    ok;
+	Agents2 ->
+	    ?FAIL({agent_registration_failure, Agents2})
+    end,
+
+    p("verify user_beta agent(s)"),
+    case mgr_which_agents(ManagerNode, user_beta) of
+	Agents3 when length(Agents3) =:= 0 ->
+	    p("hobbe agents: ~p~n", [Agents3]),
+	    ok;
+	Agents3 ->
+	    ?FAIL({agent_registration_failure, Agents3})
+    end,
+
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    p("unregister user user_alfa"),
+    ?line ok = mgr_unregister_user(ManagerNode, user_alfa),
+
+    p("verify all agent(s): expect 0"),
+    case mgr_which_agents(ManagerNode) of
+	Agents4 when length(Agents4) =:= 0 ->
+	    p("all agents: ~p~n", [Agents4]),
+	    ok;
+	Agents4 ->
+	    ?FAIL({agent_unregistration_failure, Agents4})
+    end,
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    p("verify all agent(s): expect 0"),
+    case mgr_which_agents(ManagerNode) of
+	[] ->
+	    ok;
+	Agents5 ->
+	    p("all agents: ~p~n", [Agents5]),
+	    ?FAIL({agent_unregistration_failure, Agents5})
+    end,
+
+    p("manager info: ~p~n", [mgr_info(ManagerNode)]),
+
+    p("unregister user user_beta"),
     ?line ok = mgr_unregister_user(ManagerNode, user_beta),
 
     p("manager info: ~p~n", [mgr_info(ManagerNode)]),
diff --git a/lib/snmp/vsn.mk b/lib/snmp/vsn.mk
index 29228fc59b..08251ab9ea 100644
--- a/lib/snmp/vsn.mk
+++ b/lib/snmp/vsn.mk
@@ -17,6 +17,6 @@
 #
 # %CopyrightEnd%
 
-SNMP_VSN = 4.20
+SNMP_VSN = 4.21
 PRE_VSN  =
 APP_VSN  = "snmp-$(SNMP_VSN)$(PRE_VSN)"