SNMP question for IPv6 on a Catalyst 2960G

[mjames_wdd]

I recently picked up a Catalyst 2960G and am trying to get SNMP management working over IPv6.  I have the IP Address set to the local link, and can successfully ping and telnet to the switch (so the network can get traffic to and from the switch).  However, SNMP packets just seem to disappear.  I am running WireShark on my machine, and I see the packets go out to the proper IP, but nothing comes back.  When I check "sho ipv6 traffic", I can see where there are UDP packets that are received, but, again, none going out.  Also, when I run "sho snmp", all of the packet counts are 0.

Here are some relavant snipets from my "sho run":

interface Vlan1

no ip address

no ip route-cache

ipv6 enable

!

ip http server

ip http secure-server

snmp-server community public RW

... and from "sho ipv6 int vlan1" ...

Vlan1 is up, line protocol is up

  IPv6 is enabled, link-local address is FE80::D2C2:82FF:FE5B:D640

  No Virtual link-local address(es):

  No global unicast address is configured

  Joined group address(es):

    FF02::1

    FF02::1:FF5B:D640

  MTU is 1500 bytes

  ICMP error messages limited to one every 100 milliseconds

  ICMP redirects are enabled

  ICMP unreachables are sent

  ND DAD is enabled, number of DAD attempts: 1

  ND reachable time is 30000 milliseconds (using 24624)

... and from "sho ver" ...

Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2010 by Cisco Systems, Inc.

Compiled Tue 28-Sep-10 13:44 by prod_rel_team

Image text-base: 0x00003000, data-base: 0x01400000

What else am I missing?

Thanks - Matt

[Joe Clarke]

The problem may be due to a lack of IPv6 global address.  I've never tried to use link-local for SNMP.  I just tested a 3560 running 12.2(55)SE and it did not work with link-local, but it does work with global.

[Joe Clarke · Accepted solution]

I just found CSCtl70597.  SNMP queries to link-local addresses are not working at this time.  You'll need to configure a global IPv6 address.

[mjames_wdd]

Joseph -

That answers a lot.  Could not figure out why everything else works, but not this.  I don't have BugTool access, so I can't look at the specifics, but this is at least a step in the right direction.

So, being a bit of a new-comer to the IPv6 world, if I wanted to assign global addresses to my machine and the switch, so that we could talk to each other within a completely IPv4 network, what addresses should I pick?  I've tried using ::w.x.y.z/96 with matching IPs as my IPv4 network, but the switch wouldn't allow it.  What am I best off using that won't get routed out of my network, but can still get routed within it?

Thanks,

Matt

[Joe Clarke]

Typically, you want to use /64 blocks for shared media like ethernet.  If you don't have an IPv6 block assigned to you, try:

fd00:1234:5678:9abc::/64

So, the switch will get fd00:1234:5678:9abc::1 and the workstation will get fd00:1234:5678:9abc::2

[ROBERTO TACCON]

Matt try to generate and use a IPv6 ULA address

http://www.sixxs.net/tools/grh/ula/