Unanswered Question
Sep 28th, 2009


It seems that a SNMP walk on a IPv6 enabled switch does not show IPV6-MIB related information.

What software ver supports IPV6-MIB?

The cisco Object navigator does not show any images as well :

C:\>snmpwalk -v 2c -c public

SNMPv2-SMI::mib-2.55 = No Such Object available on this agent at this OID

What is the reason? Does any cisco IOS has ipv6Mib?


I have this problem too.
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Joe Clarke Mon, 09/28/2009 - 13:35

The short answer is, "no." The longer answer is, you can use the MIB Locator tool to find out what MIBs are supported in what versions of IOS. You can also search for a specific MIB. The MIB Locator can be found at http://www.cisco.com/go/mibs/ .

That said, just because the IPV6-MIB is not supported does not mean there isn't any IPv6 management in IOS. IOS supports the CISCO-IETF-IP-MIB and CISCO-IETF-IP-FORWARD-MIB which are v6-aware.

georgeef1 Mon, 10/05/2009 - 11:10

Thanks jclarke,

I checked those MIBs and it looks like they don't support what I

need. What I am looking for is the SNMP equivalent of show ipv6

neighbors which IPv6MIB supports:

TechNet_Core#show ipv6 neighbors

IPv6 Address Age Link-layer Addr State


FE80::DD62:F923:3287:3559 9 0019.b91b.7264 STALE Vl36

FE80::803E:D1D6:988D:64C0 3 0022.19f3.b8bc DELAY Vl32

2001:480:610:32:D35:5542:2C1F:FCE4 0 0022.19f3.b8bc REACH Vl32

2001:480:610:35:D482:5CAD:AE1C:91A0 56 0021.9b4e.024f STALE Vl35

2001:480:610:40:21F:F3FF:FE55:C258 20 001f.f355.c258 STALE Vl40

FE80::221:70FF:FEC6:99A5 17 0021.70c6.99a5 STALE Vl43

2001:480:610:33:250:56FF:FE89:6B9 238 0050.5689.06b9 STALE Vl33

FE80::204:23FF:FEA7:7298 0 0004.23a7.7298 STALE Vl32

FE80::221:9BFF:FE4E:24F 55 0021.9b4e.024f STALE Vl35

2001:480:610:32:204:23FF:FEA7:7298 0 0004.23a7.7298 STALE Vl32

FE80::21F:F3FF:FE55:C258 19 001f.f355.c258 STALE Vl40

2001:480:610:43:221:70FF:FEC6:99A5 0 0021.70c6.99a5 REACH Vl43

FE80::224:E8FF:FEA4:577F 2 0024.e8a4.577f STALE Vl32

FE80:8000::1 0 000b.453a.d000 REACH

Please suggest.


Joe Clarke Mon, 10/05/2009 - 11:34

The cInetNetToMediaTable in the CISCO-IETF-IP-MIB is giving me this information on my 7206. It matches with my show ipv6 neighbor data. I have:

IPv6 Address Age Link-layer Addr State Interface

2003:A00::2 0 0017.085a.1b16 REACH Fa0/0

And the SNMP walk of the cInetNetToMediaTable:

CISCO-IETF-IP-MIB::cInetNetToMediaPhysAddress.3.ipv6."20:03:0a:00:00:00:00:00:00:00:00:00:00:00:00:02" = STRING: 0:17:8:5a:1b:16:0:0

CISCO-IETF-IP-MIB::cInetNetToMediaLastUpdated.3.ipv6."20:03:0a:00:00:00:00:00:00:00:00:00:00:00:00:02" = Timeticks: (147451003) 17 days, 1:35:10.03

CISCO-IETF-IP-MIB::cInetNetToMediaType.3.ipv6."20:03:0a:00:00:00:00:00:00:00:00:00:00:00:00:02" = INTEGER: dynamic(3)

CISCO-IETF-IP-MIB::cInetNetToMediaState.3.ipv6."20:03:0a:00:00:00:00:00:00:00:00:00:00:00:00:02" = INTEGER: reachable(1)


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