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

Hi,
Even If you’re not an expert as you wrote previously, this keyword is not present on the google or in some examples present in the net-snmp tutorial. Then, it’s quite hard to find ...

Thanks a lot, now it’s working.
I put the MIB OID terminated by .0 and everything dialogs correctly.

Cordialement 
Philippe DENIS

> Le 5 févr. 2020 à 21:26, Larry Hayes <[email protected]> a écrit :
> 
> 
> 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]
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