MIBS to Monitor Etherchannel and trunks via SNMP

tschlosser · ‎02-20-2009

I would like to monitor the status of etherchannel and trunk configurations in 6500 Catalyst switches running both CATOS and IOS. I would like to understand the specific mibs/OIDS that should be monitored for etherchannels and trunks. I am trying to get a better handle on tracking the etherchannels and trunk dynamically and then understanding when the ports are having issues (up/down and errors). I need to understand how to differentiate these type of ports from regular access ports.

Thanks,

Tim

rtuttle · ‎02-20-2009

at the cli, perform a "show snmp mib ifmib ifindex | inc Port-

This will show you all the mib variables supported as well as the interface values. From here lookup the oid and massage as needed.

akintokun · ‎06-06-2013

I have found the SNMP to monitor if a port in a EtherChannel fails.

dot3adAggAggregateOrIndividual

http://ipmsupport.solarwinds.com/mibs/IEEE8023-LAG-MIB/item.aspx?id=dot3adAggAggregateOrIndividual

Rolf Fischer · ‎06-06-2013

Hi Tim,

what exactly do you want to query via SNMP?

For an (PAgP) Etherchannel, the member-interfaces might be interesting:

https://supportforums.cisco.com/message/3957914#3957914

For a trunk, you could start with the operational mode, depending on the platform you can use:

vlanTrunkPortDynamicStatus (CISCO-VTP-MIB):

vlanTrunkPortDynamicStatus.49 = notTrunking

vlanTrunkPortDynamicStatus.50 = trunking

vlanPortIslOperStatus (CISCO-STACK-MIB):

vlanPortIslOperStatus.13.43 = notTrunking

vlanPortIslOperStatus.13.44 = trunking

Hope that helps

Rolf

Michel Hegeraat · ‎06-10-2013

Keep in mind that the Pos interface (agregate) won't tell you much more then the load.

All interface errors must be found on the physical interface level.

If ever I monitor the Pos it is just to show the used bandwidth in a graph to please my customer, for the rest no aggregate or virtual interfaces are monitored, just the physical interfaces of the trunks are what I consider as interesting.

Cheers,

Michel