Hi David, All,
Upon snmpd start I got the following prints:
registered debug token verbose:ifTable:ifSpeed_get, 1
registered debug token verbose:ifTable:ifPhysAddress_get, 1
registered debug token verbose:ifTable:ifAdminStatus_get, 1
registered debug token verbose:ifTable:ifOperStatus_get, 1
registered debug token verbose:ifTable:init_ifTable, 1
registered debug token verbose:ifTable:initialize_table_ifTable, 1
registered debug token verbose:ifTable:ifTable_rowreq_ctx_init, 1
registered debug token verbose:ifTable:ifTable_pre_request, 1
registered debug token verbose:ifTable:ifDescr_get, 1
So it seems I enabled logging for ifSpeed (for example).
Then from MIB browser (iReasoning) I sent an ifSpeed request and got the following message:
No data available (127.0.0.1)
OID: ifSpeed
This response was fast.
When I tried sending sysDescr I got a response with data ( Linux localhost.localdomain ...)
In /var/log/snmpd.log I got no further messages.
I expected to get:
DEBUGMSGTL(("verbose:ifTable:ifSpeed_get", "called\n"));
Should I add the if-mib to the agent ?
Best regards,
Z.V
________________________________________
From: Fernández Piñas, David [***@indra.es]
Sent: Tuesday, May 24, 2016 9:15 AM
To: Vered Zvi; net-snmp-***@lists.sourceforge.net
Subject: RE: Developing SNMP agent for a new switch
It depends on what you want to see... AFAIK, the -DdebugTag enables the tracing of "Debug Message" in the code when calling, e.g. DEBUGMSGTL(("debugTag", "Debug Message"));
-----Mensaje original-----
De: Vered Zvi [mailto:***@elta.co.il]
Enviado el: martes, 24 de mayo de 2016 4:44
Para: Fernández Piñas, David; net-snmp-***@lists.sourceforge.net
Asunto: RE: Developing SNMP agent for a new switch
Hi David, All,
As you wrote, -D gives a log of debug messages.
What TOKEN I can put after -D in order to filter ?
Best regards,
Z.V
________________________________________
From: Fernández Piñas, David [***@indra.es]
Sent: Tuesday, May 17, 2016 12:49 PM
To: Vered Zvi; net-snmp-***@lists.sourceforge.net
Subject: RE: Developing SNMP agent for a new switch
Hi,
You can specify the log file with option -Lf, e.g.: -Lf /var/log/snmpd.log
The option to write Debug information is -D, but use it with just what you want to see, because enabling all DEBUG info is a lot of info being written to the log file.
I don't know what to say about "basic SNMP OIDs, MIBs that every switch supports". If you have a competitor product, buy it and check it. But I think it is more interesting to survey netadmins to see what are they using rather than implementing a lot of unused features.
Best regards,
David
-----Mensaje original-----
De: Vered Zvi [mailto:***@elta.co.il] Enviado el: sábado, 14 de mayo de 2016 21:13
Para: Fernández Piñas, David; net-snmp-***@lists.sourceforge.net
Asunto: RE: Developing SNMP agent for a new switch
Hi David, All,
If I install snmpd without any changes and send a valid SNMP request,
is there a way to run snmpd so it will print some debug messages upon an SNMP request ?
Where can I find a list of basic SNMP OIDs, MIBs that every switch supports ?
Best regards,
Z.V
________________________________________
From: Fernández Piñas, David [***@indra.es]
Sent: Friday, May 06, 2016 11:05 AM
To: Vered Zvi; net-snmp-***@lists.sourceforge.net
Subject: RE: Developing SNMP agent for a new switch
Hi Zvika,
Try to run snmpd on your x86 CPU either by installing the Net-SNMP for the corresponding operating system or compiling it from the sources.
Configuring Net-SNMP: snmpconf -i
The recommended way to start snmpd is with the following command line:
/usr/sbin/snmpd -I-udp,udpTable,tcp,tcpTable,icmp,ip,interfaces,system_mib,sysORTable
Then, you can see what information it provides with:
$ snmpwalk -v 1 -c public localhost .iso
The traps supported will depend on the supported MIBs. You must configure snmpd to send traps, e.g. at the configuration file snmpd.conf. Then you can run snmptrapd to get the traps from snmpd.
Best regards,
David
-----Mensaje original-----
De: Vered Zvi [mailto:***@elta.co.il] Enviado el: viernes, 06 de mayo de 2016 4:50
Para: Fernández Piñas, David; net-snmp-***@lists.sourceforge.net
Asunto: RE: Developing SNMP agent for a new switch
Hi David,
The Intel's switch does not have any MIBs at all.
Intel delivers it without any SNMP features.
There is only an API that can control the switch via an x86 CPU connected to the switch via PCIe.
Is it possible to run snmpd without adding any code and just see how it responds to SNMP requests ?
I'm aware the reply from snmpd will not contain any valid information.
Does snmpd support SNMP traps ?
Best regards,
Zvika
_____________________________________
From: Fernández Piñas, David [***@indra.es]
Sent: Thursday, May 05, 2016 4:46 PM
To: Vered Zvi; net-snmp-***@lists.sourceforge.net
Subject: RE: Developing SNMP agent for a new switch
Do you have the switch MIB to support by the SNMP agent (ASN.1)? If this is a private company MIB, I would do a AgentX subagent implementing and getting the information from the PCIe device, then the Net-SNMP snmpd will give you some standard additional MIBs.
There is plenty of documentation, although not so easy to follow, from my point of view, in the Net-SNMP Project website, but after some hours of navigation you should be able to find your way.
Best regards,
David
-----Mensaje original-----
De: Vered Zvi [mailto:***@elta.co.il] Enviado el: jueves, 05 de mayo de 2016 11:31
Para: net-snmp-***@lists.sourceforge.net
Asunto: Developing SNMP agent for a new switch
Hello,
I have to develope an SNMP agent for an Intel's switch.
The switch is controlled via an x86 CPU connected to the switch via PCIe.
Is snmpd is a good starting point ?
Is there a manual explains how to develope such agent from scratch ?
Best regards,
Z.V
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