Re: Net-snmp 5.7.3 - Issue to communicate with subAgent and Master Agent

I am no expert, but I also run snmpd and a custom sub agent configuration.
Your sub agent should be registering with the master what OIDs it will
handle:
One line for each MIB.

    REGISTER_SYSOR_TABLE(companyx_oid, companyx_oid_len, "Top level MIB for
Company products");
    REGISTER_SYSOR_TABLE( companyx_base_oid,  companyx_base_oid_len, "MIB
for Company base OIDs");
    REGISTER_SYSOR_TABLE( companyx_events_oid,  companyx_events_oid_len,
"MIB for Company notifications and traps");
    REGISTER_SYSOR_TABLE( companyx_mgmt_oid,  companyx_mgmt_oid_len, "MIB
for Company Mgmt");

Larry Hayes

On Tue, Feb 4, 2020 at 5:20 PM Philippe Denis <[email protected]> wrote:

> Hello all,
> I've performed some actions to fix my problem(s) but I'm not sure the
> situation is the one that I though; it's.
>
> I though the Agentx and master agent are connected based on the following
> behaviour:
>
>    - I've started the Master agent followed by the Agentx, I got a
>    connection message.
>    - When stopping the Master Agent, I've seen a message saying that the
>    connection between the master agent and the subagent is broken. (message
>    AgentX master disconnected us, reconnecting in 15)
>    - Is it sufficient to be sure that the Master Agent and Sub-agentx are
>    correctly connected ?
>
>
> I've read that on Google that in the SubagentX configuration file, I need
> to declare the MIB which is allocated to the subagent. I'm not sure of the
>  keyword to use, I've added in the SubAgentx file: 'view all included'
> terminated by the value of my MIB OID. Is it correct ?
>
> If someone has some clues or advices to help me to clearly identify this
> problem.
>
> Thanks by advance
> Ph. DENIS
>
> Le lun. 3 févr. 2020 à 00:52, Philippe Denis <[email protected]> a
> écrit :
>
>> *Expéditeur:* Philippe Denis <[email protected]>
>>
>> *Date:* 3 février 2020 à 00:41:11 UTC+1
>> *Destinataire:* Magnus Fromreide <[email protected]>
>> *Objet:* *Rép:  Net-snmp 5.7.3 - Issue to communicate with subAgent and
>> Master Agent*
>>
>> Hello,
>>
>> I’ve succeeded to connect the sub-agent and the master agent by using the
>> /var/agents/master in the c code and also in conf. Files.
>>
>> Both are exchanging request but no value is received from local host or
>> through remote.
>>
>> I got the following error messages ‘´Timeout: No response from
>> localhost’’ when using a snmpget.
>>
>> Then I’m wondering if the objects which are part of my daemon are
>> correctly registered as I put a syslog in an handler and this one is never
>> displays.
>>
>> How can I know if the sub agent had registred correctly the OIDs?
>> Moreover, I read that as a good advice you can generate C code and test
>> it on the master agent and after that move it to the sub agent. This code
>> should not be impacted.
>>
>> Then what is the difference between netsnmp_register_long_instance and
>> the couple netsnmp_create_handler_registration & netsnmp_register_instance.
>> Which one should I used to register objects from my subagent?
>>
>> Thanks for your help.
>> Philippe DENIS
>>
>> Le 2 févr. 2020 à 23:07, Magnus Fromreide <[email protected]> a écrit
>> :
>>
>>
>> On Sun, Feb 02, 2020 at 02:13:59PM +0100, Philippe Denis wrote:
>>
>> Hello all,
>>
>>
>> I've a problem to communicate with my subAgent through the Master Agent.
>>
>> I've used the option -Dnetsnmp_udpbase and the message is correctly
>>
>> received at master Agent level (of course, the one which send from remote
>>
>> PC or localhost).
>>
>>
>> The Master Agent is not responding to the request sent by an snmpget
>>
>> command.
>>
>>
>> The Master Agent is launched with the this command line:
>>
>>
>>
>> *snmpd -Dnetsnmp_udpbase -f -Lo -C -c /usr/share/snmp/snmpd.conf
>>
>> -agentXSocket=tcp:localhost:1705 udp:1161 -VVV*
>>
>>
>> *See attached the log of the command:*
>>
>>
>> Could you please rerun the test with the agent debug flags
>>
>> -Dagentx -Dtdomain
>>
>>
>> -Dagentx logs the agentx interactions
>>
>> -Dtdomain logs all opening of sockets
>>
>>
>> *registered debug token netsnmp_udpbase, 1Log handling defined -
>>
>> disabling stderrTurning on AgentX master support.netsnmp_udpbase: open
>>
>> local UDP: [0.0.0.0]:1161->[0.0.0.0]:0netsnmp_udpbase: set
>>
>> IP_PKTINFOnetsnmp_udpbase: binding socket: 7 to UDP:
>>
>> [0.0.0.0]:0->[0.0.0.0]:1161NET-SNMP version 5.8*
>>
>>
>> Which is based on the one present in
>>
>> http://net-snmp.sourceforge.net/wiki/index.php/TUT:Writing_a_Subagent
>>
>>
>> The content of the snmpd.conf used is the following one:
>>
>>
>> master agentx
>>
>> agentxsocket /var/agentx/master
>>
>> agentxperms 777 777
>>
>>
>> rwuser MyCom_RW
>>
>> rouser MyCom_RO
>>
>>
>>
>> For the subagent, I'm using the following command line:
>>
>>
>> *./mysubagent -f -Lo -x  tcp:localhost:1705*
>>
>>
>>
>> *snmpget -v 2c -c MyCom_RW localhost .1.3.6.1.4.1.32699.255.4.1.0Timeout:
>>
>> No Response from localhost.*
>>
>>
>> I'm quite surprise my mib is known as the snmptranslate -Tp -IR MyTestmib
>>
>> answered correctly.
>>
>>
>> This means you have told snmptranslate where the mib is located. This is
>> good.
>>
>>
>> I've also used net-snmp 5.8 but still have the same result.
>>
>>
>> Thanks by avdance for your help
>>
>> --
>>
>> Cordialement
>>
>> Ph. DENIS
>>
>>
>>
>> _______________________________________________
>>
>> Net-snmp-coders mailing list
>>
>> [email protected]
>>
>> https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
>>
>>
>>
>
> --
> Cordialement
> Ph. DENIS
> _______________________________________________
> Net-snmp-coders mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
>

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