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SNMP Bridge table in Cisco Catalyst 4006


I'm trying to access sevaral Cisco 4006 switch bridge table using SNMP OID: iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).dot1dBridge(17).dot1dTp(4).dot1dTpFdbTable(3).dot1dTpFdbEntry(1)

Unfortunately, I always get ports as 0. I checked the access permissions for the community name I used, and it seems OK. Any idea whether this particular switch doesn't supports bridge tables?



New Member

Re: SNMP Bridge table in Cisco Catalyst 4006

After investigating further, it appears that this particular OID doesn't returns persistent data. Sometimes we get only MAC addresses without port indexes; sometimes only port indexes; some times only port indexes, but different from the ones we got a few seconds ago; etc.

ANY IDEAS ???!!!!

P.S: The rest of the MIB works fine, different browsers and different switches (all 4006) gave the same, unpersistent results!

New Member

Re: SNMP Bridge table in Cisco Catalyst 4006

I think the issue is that switches running IOS have only limited support for the BRIDGE-MIB. It appears that the Mib is applicable only to the default VLAN.

Re: SNMP Bridge table in Cisco Catalyst 4006

Since there has been no response to your post, it appears to be either too complex or too rare an issue for other forum members to assist you. If you don't get a suitable response to your post, you may wish to review our resources at the online Technical Assistance Center ( or speak with a TAC engineer. You can open a TAC case online at

If anyone else in the forum has some advice, please reply to this thread.

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