SNMP Communication

andrewburridge — Fri, 21 Feb 2020 12:18:07 GMT

Hey All,

Just wondering if anyone could help with an issue I'm having trying to get SNMP functioning correctly on a switch.

We have a mature environment with switches logging to an NMS. I've recently added a new switch, and am having difficulty adding it to this structure.

I've copied the SNMP config on the working switch to the new one, as follows:

snmp-server community pub RO 10

snmp-server community test RO 11

snmp-server location LAN

snmp-server contact IT

snmp-server chassis-id SN:#######

I never see any communication between the new switch and the NMS however. An output of 'sho snmp' is as follows:

0 SNMP packets input

0 Bad SNMP version errors

0 Unknown community name

0 Illegal operation for community name supplied

0 Encoding errors

0 Number of requested variables

0 Number of altered variables

0 Get-request PDUs

0 Get-next PDUs

0 Set-request PDUs

0 Input queue packet drops (Maximum queue size 1000)

0 SNMP packets output

0 Too big errors (Maximum packet size 1500)

0 No such name errors

0 Bad values errors

0 General errors

0 Response PDUs

0 Trap PDUs

SNMP global trap: disabled

SNMP logging: disabled

SNMP agent enabled

So it's not like packets are getting lost in between, they're never being originated. I can't find any Cisco documentation that I've missed. Any ideas?

Thanks.

Re: SNMP Communication

alexandre.semenov — Sun, 10 Apr 2011 12:27:17 GMT

Hello! You have to configure the ip address for NMS.Example: snmp-server host XXXX community.

Re: SNMP Communication

jepalmer — Thu, 21 Jul 2011 13:57:48 GMT

For sending traps you do need at least one host plus you need to enable traps to send.

Ex; snmp-server enable traps .....

For polling the device you are using acl 10 & 11, make sure the ACLs are correct

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SNMP Communication

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