[manager] No way to specify transport domain. Transport domains was

assumed to be IPv4.
This has now been changed so that it can also be IPv6. To facilitate this,
the transportDomain is now a (new) valid option.
This also mean that the transport behaviour has changed.
OTP-9305

[agent] A temporary fix for transport domain, specifically regarding
trap sending. This is done in order to make testing possible,
pending merge from topic branch.
OTP-9400

5 files changed, 464 insertions, 209 deletions

diff --git a/lib/snmp/src/manager/snmpm.erl b/lib/snmp/src/manager/snmpm.erl
index 0d084332de..67e3673b74 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).
 
@@ -379,6 +380,11 @@ which_users() ->
 %% Config     -> Agent configuration: [config()]
 
 do_register_agent(UserId, TargetName, Config) ->
+    io:format("do_register_agent -> entry with"
+	      "~n   UserId:     ~p"
+	      "~n   TargetName: ~p"
+	      "~n   Config:     ~p"
+	      "~n", [UserId, TargetName, Config]),
     snmpm_config:register_agent(UserId, TargetName, Config).
 
 register_agent(UserId, TargetName, Config) 
@@ -405,13 +411,21 @@ register_agent(UserId, Addr) ->
 
 %% Backward compatibility 
 register_agent(UserId, Addr, Port, Config0) ->
+    io:format("register_agent -> entry with"
+	      "~n   UserId:  ~p"
+	      "~n   Addr:    ~p"
+	      "~n   Port:    ~p"
+	      "~n   Config0: ~p"
+	      "~n", [UserId, Addr, Port, Config0]),
     case lists:keymember(target_name, 1, Config0) of
 	false ->
+	    io:format("register_agent -> no target_name~n", []),
 	    TargetName = mk_target_name(Addr, Port, Config0), 
 	    Config     = [{reg_type, addr_port}, 
 			  {address, Addr}, {port, Port} | Config0], 
 	    do_register_agent(UserId, TargetName, ensure_engine_id(Config));
 	true ->
+	    io:format("register_agent -> target_name~n", []),
 	    {value, {_, TargetName}} = 
 		lists:keysearch(target_name, 1, Config0),
 	    Config1 = lists:keydelete(target_name, 1, Config0),
@@ -447,8 +461,11 @@ 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 f6a085f7d5..6cafa1fef8 100644
--- a/lib/snmp/src/manager/snmpm_config.erl
+++ b/lib/snmp/src/manager/snmpm_config.erl
@@ -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(VALID_DOMAINS,      [transportDomainUdpIpv4, transportDomainUdpIpv6]).
 
 -ifdef(snmp_debug).
 -define(GS_START_LINK(Opts),
@@ -159,6 +163,11 @@
 %%%-------------------------------------------------------------------
 %%% API
 %%%-------------------------------------------------------------------
+
+default_transport_domain() ->
+    snmpUDPDomain.
+
+
 start_link(Opts) -> 
     ?d("start_link -> entry with"
        "~n   Opts: ~p", [Opts]),
@@ -308,57 +317,117 @@ 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)) ->
+
+    ?vtrace("register_agent -> entry with"
+	    "~n   UserId:     ~p"
+	    "~n   TargetName: ~p"
+	    "~n   Config0:    ~p", [UserId, TargetName, Config0]),
 
-%%     p("register_agent -> entry with"
-%%       "~n   UserId:     ~p"
-%%       "~n   TargetName: ~p"
-%%       "~n   Config:     ~p", [UserId, TargetName, Config]),
+    io:format("register_agent -> entry with"
+	      "~n   UserId:     ~p"
+	      "~n   TargetName: ~p"
+	      "~n   Config0:    ~p"
+	      "~n", [UserId, TargetName, Config0]),
 
     %% Check: 
     %%   1) That the mandatory configs are present
-    %%   2) That the illegal config, user_id (used internally), 
+    %%   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) Check that the manager is capable of using the selected version
-    case verify_agent_config(Config) of
-	ok ->
+    case verify_agent_config(Config0) of
+	{ok, Config} ->
+	    io:format("register_agent -> agent config verified"
+		      "~n   Config: ~p"
+		      "~n", [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),
+	    io:format("verify_agent_config -> agent config verified: "
+		      "~n   Conf:    ~p"
+		      "~n", [Conf]),
+	    Vsns = versions(),
+	    io:format("verify_agent_config -> Vsns: ~p~n", [Vsns]),
+	    Vsn  = which_version(Conf),
+	    io:format("verify_agent_config -> Vsn: ~p~n", [Vsn]),
+	    verify_version(Vsn, Vsns),
+	    io:format("verify_agent_config -> version verified~n", []),
+	    {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
+    io:format("verify_agent_config3 -> entry with"
+	      "~n   Conf0:    ~p"
+	      "~n", [Conf0]),
+    {TDomain, Conf1} = 
+	case lists:keysearch(tdomain, 1, Conf0) of
+	    {value, {domain, Dom}} ->
+		{Dom, Conf0};
+	    false ->
+		Dom = default_transport_domain(), 
+		{Dom, [{domain, 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).
 
@@ -422,17 +491,51 @@ 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(domain, 1, Info0) of
+				{value, {domain, Dom}} ->
+				    Dom;
+				false ->
+				    {ok, Dom} = 
+					agent_info(TargetName, domain),
+				    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} ->
@@ -440,6 +543,7 @@ 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
@@ -651,22 +755,14 @@ 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.
 
@@ -1599,19 +1695,19 @@ check_agent_config({UserId,
 		    EngineId, 
 		    Timeout, MaxMessageSize, 
 		    Version, SecModel, SecName, SecLevel}) ->
-    TDomain = snmpm_conf:default_transport_domain(),
+    TDomain = default_transport_domain(),
     check_agent_config({UserId, 
 			TargetName, 
 			Community, 
 			TDomain, Ip, Port, 
 			EngineId, 
 			Timeout, MaxMessageSize, 
-			Version, SecModel, SecName, SecLevel}).
+			Version, SecModel, SecName, SecLevel});
 
 check_agent_config({UserId, 
 		    TargetName, 
 		    Community, 
-		    Domain, Ip, Port, 
+		    TDomain, Ip, Port, 
 		    EngineId, 
 		    Timeout, MaxMessageSize, 
 		    Version, SecModel, SecName, SecLevel}) ->
@@ -1633,7 +1729,7 @@ check_agent_config({UserId,
 	     TDomain, Ip, Port, 
 	     EngineId, Timeout, MaxMessageSize, 
 	     Version, SecModel, SecName, SecLevel]),
-    Addr = normalize_address(Domain, Ip),
+    Addr = normalize_address(TDomain, Ip),
     ?vtrace("check_agent_config -> Addr: ~p", [Addr]),
     Agent = {UserId, 
 	     TargetName, 
@@ -1672,14 +1768,14 @@ verify_agent({UserId,
 	      EngineId, 
 	      Timeout, MMS, 
 	      Version, SecModel, SecName, SecLevel}) ->
-    TDomain = snmpm_conf:default_transport_domain(),
+    TDomain = default_transport_domain(),
     verify_agent({UserId, 
 		  TargetName, 
 		  Comm, 
 		  TDomain, Ip, Port, 
 		  EngineId, 
 		  Timeout, MMS, 
-		  Version, SecModel, SecName, SecLevel}).
+		  Version, SecModel, SecName, SecLevel});
 
 verify_agent({UserId, 
 	      TargetName, 
@@ -1688,59 +1784,64 @@ verify_agent({UserId,
 	      EngineId, 
 	      Timeout, MMS, 
 	      Version, SecModel, SecName, SecLevel}) ->
-    ?vtrace("verify_agent -> entry with"
+    ?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}),
-	    %% 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.
-	    Conf = 
-		[{reg_type,         target_name},
-		 {tdomain,          TDomain}, 
-		 {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},
+	 {domain,           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(Conf) ->
-    VerifiedConf = [], 
-    verify_agent2(Conf, VerifiedConf).
-
-verify_agent2([], _VerifiedConf) ->
-    ok;
-verify_agent2([{Item, Val}|Items], VerifiedConf) ->
-    case verify_val(Item, Val) of
-	{ok, _Val} ->
-	    verify_agent2(Items);
+verify_agent2(Conf) -> 
+    io:format("verify_agent2 -> entry with"
+	      "~n   Conf: ~p"
+	      "~n", [Conf]),
+    verify_agent2(Conf, []).
+
+verify_agent2([], VerifiedConf) ->
+    io:format("verify_agent2 -> entry when done with"
+	      "~n   VerifiedConf: ~p"
+	      "~n", [VerifiedConf]),
+    {ok, VerifiedConf};
+verify_agent2([{Item, Val0}|Items], VerifiedConf) ->
+    io:format("verify_agent2 -> entry with"
+	      "~n   Item:         ~p"
+	      "~n   Val0:         ~p"
+	      "~n   VerifiedConf: ~p"
+	      "~n", [Item, Val0, VerifiedConf]),
+    case verify_val(Item, Val0) of
+	{ok, Val} ->
+	    io:format("verify_agent2 -> ~p verified: ~p~n", [Item, Val]),
+	    verify_agent2(Items, [{Item, Val} | VerifiedConf]);
 	Err ->
 	    Err
     end;
-verify_agent2([Bad|_]) ->
+verify_agent2([Bad|_], _VerifiedConf) ->
     {error, {bad_agent_config, Bad}}.
 
 
@@ -1756,14 +1857,28 @@ 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;
@@ -1804,16 +1919,16 @@ 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, 
@@ -1831,10 +1946,15 @@ 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.
 
@@ -2195,6 +2315,16 @@ 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: "
@@ -2204,6 +2334,7 @@ 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: "
@@ -2565,16 +2696,27 @@ 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>
@@ -2599,10 +2741,18 @@ 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;
@@ -2637,41 +2787,61 @@ 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) ->
@@ -2833,23 +3003,41 @@ usm_key(EngineId, Name) ->
 %% ---------------------------------------------------------------------
 
 verify_mandatory(_, []) ->
+    io:format("verify_mandatory -> entry when done~n", []),
     ok;
 verify_mandatory(Conf, [Mand|Mands]) ->
+    io:format("verify_mandatory -> entry with"
+	      "~n   Mand: ~p"
+	      "~n   Conf: ~p"
+	      "~n", [Mand, Conf]),
     case lists:keymember(Mand, 1, Conf) of
 	true ->
+	    io:format("verify_mandatory -> Mandatory option ~p present~n", 
+		      [Mand]), 
 	    verify_mandatory(Conf, Mands);
 	false ->
-	    {error, {missing_mandatory_config, Mand}}
+	    io:format("verify_mandatory -> "
+		      "Mandatory option ~p *not* present~n", [Mand]), 
+	    throw({error, {missing_mandatory_config, Mand}})
     end.
 
 verify_invalid(_, []) ->
+    io:format("verify_invalid -> entry when done~n", []),
     ok;
 verify_invalid(Conf, [Inv|Invs]) ->
+    io:format("verify_invalid -> entry with"
+	      "~n   inv:  ~p"
+	      "~n   Conf: ~p"
+	      "~n", [Inv, Conf]),
     case lists:member(Inv, Conf) of
 	false ->
+	    io:format("verify_invalid -> ~p *not* present"
+		      "~n", [Inv]),
 	    verify_invalid(Conf, Invs);
 	true ->
-	    {error, {illegal_config, Inv}}
+	    io:format("verify_invalid -> ~p *present*"
+		      "~n", [Inv]),
+	    throw({error, {illegal_config, Inv}})
     end.
 
 
@@ -2858,10 +3046,21 @@ 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(domain, snmpUDPDomain = _Domain) ->
+    verify_val(domain, transportDomainUdpIpv4);
+verify_val(domain, Domain) ->
+    case lists:member(Domain, ?VALID_DOMAINS) of
+	true ->
+	    {ok, Domain};
+	false ->
+	    error({bad_domain, Domain})
+    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 ->
@@ -2872,6 +3071,8 @@ 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 ->
@@ -2923,7 +3124,7 @@ 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}}.
 
 
 %%%-------------------------------------------------------------------
diff --git a/lib/snmp/src/manager/snmpm_mpd.erl b/lib/snmp/src/manager/snmpm_mpd.erl
index 7712370d28..3d93c461bd 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),
 
@@ -102,16 +102,16 @@ 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, 
+	    process_v1_v2c_msg('version-2', NoteStore, Msg, 
+			       Domain, Addr, Port, 
 			       Community, Data, HS, Logger);
 
 	%% Version 3
@@ -148,7 +148,7 @@ 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) ->
 
@@ -158,7 +158,10 @@ process_v1_v2c_msg(Vsn, _NoteStore, Msg, snmpUDPDomain,
 	    "~n   Port:      ~p"
 	    "~n   Community: ~p"
 	    "~n   HS:        ~p", [Vsn, Addr, Port, Community, HS]),
-    
+
+    TDomain  = snmp_conf:mk_tdomain(Domain), 
+    TAddress = snmp_conf:mk_taddress(Domain, Addr, Port),
+
     Max      = get_max_message_size(),
     AgentMax = get_agent_max_message_size(Addr, Port),
     PduMS    = pdu_ms(Max, AgentMax, HS),
@@ -170,14 +173,14 @@ 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} ->
@@ -186,10 +189,10 @@ process_v1_v2c_msg(Vsn, _NoteStore, Msg, snmpUDPDomain,
 	    inc(snmpInASNParseErrs),
 	    {discarded, Reason}
     end;
-process_v1_v2c_msg(_Vsn, _NoteStore, _Msg, TDomain, 
+process_v1_v2c_msg(_Vsn, _NoteStore, _Msg, Domain, 
 		   _Addr, _Port, 
 		   _Comm, _HS, _Data, _Log) ->
-    {discarded, {badarg, TDomain}}.
+    {discarded, {badarg, Domain}}.
 
 pdu_ms(MgrMMS, AgentMMS, HS) when AgentMMS < MgrMMS ->
     AgentMMS - HS;
@@ -482,8 +485,8 @@ 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 +630,8 @@ 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..e6013d1658 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..374ecbd561 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(domain,   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.