[c-nsp] OSPFv3 Adjacency issues between 2921 and 3750

[Peter Subnovic]

Thanks to Pete for the pointer,

i was curios why the 3750 does not respond to ff02::5 (the 2921), so i
activated the debugging for ipv6 packets again and started to ping ff02::5
from the 2921.

Interestingly, i can't see the icmp packets at all (well atleast thats what
the debug output is telling me on the 3750).

The only thing i can see are the ospf hellos from the 2921...

2921#ping ipv6 ff02::5 size 1280
Output Interface: GigabitEthernet0/1
Type escape sequence to abort.
Sending 5, 1280-byte ICMP Echos to FF02::5, timeout is 2 seconds:
Packet sent with a source address of FE80::1%GigabitEthernet0/1

Request 0 timed out
Request 1 timed out
Request 2 timed out
Request 3 timed out
Request 4 timed out
Success rate is 0 percent (0/5)
0 multicast replies and 0 errors.

And the debug output on the 3750 looks like this:

Jul  3 10:41:10.424 CEST: IPV6: source FE80::1 (GigabitEthernet1/0/24)
Jul  3 10:41:10.424 CEST:       dest FF02::5
Jul  3 10:41:10.424 CEST:       traffic class 224, flow 0x0, len 80+14,
prot 89, hops 1, forward to ulp
Jul  3 10:41:20.096 CEST: IPV6: source FE80::1 (GigabitEthernet1/0/24)
Jul  3 10:41:20.096 CEST:       dest FF02::5
Jul  3 10:41:20.096 CEST:       traffic class 224, flow 0x0, len 80+14,
prot 89, hops 1, forward to ulp

Regards,
Peter



On Tue, Jul 3, 2012 at 10:05 AM, Peter Subnovic
<cnspmail002 at googlemail.com>wrote:

> Hi Pete,
>
> thanks for your time.
>
> The 3750 does not respond when i try to ping ff02::5. It does however
> respond to the all-nodes/all-router ll Multicast address.
>
> The authentication configuration is only for ospfv2. So i think it will
> not make any difference.I cant try it without right now.
>
> Thanks,
> Peter
>
>
> On Tue, Jul 3, 2012 at 5:27 AM, Pete Lumbis <alumbis at gmail.com> wrote:
>
>> Any difference without authentication? Does the 3750 respond to pings
>> to ff02::5?
>>
>> On Mon, Jul 2, 2012 at 4:16 PM, Peter Subnovic
>> <cnspmail002 at googlemail.com> wrote:
>> > Dear list members,
>> >
>> > i am having a somewhat odd issue (again) and i am out of ideas what is
>> > causing it.
>> >
>> > Let's assume the following very simple topology
>> >
>> > 2921 <----> 3750G-24PS
>> >
>> > All i want is to establish an OSPFv3 Adjacency between these two
>> devices.
>> > Here is where the fun (headache) begins:
>> >
>> > The 2921 is running 15.1(4)M3 and the 3750G is running 12.2(55)SE5.
>> >
>> > So i configured OSPv3 on both sides on the respective Interfaces and
>> > wondered why the adjacency wont come up.
>> >
>> > After a little bit of troubleshooting it appears that the 3750G does not
>> > "recognize" the hello packets from the 2921. I can see in the debug
>> output
>> > that they are received by the switch, but the OSPFv3 Process does not
>> > recognize them as such.
>> >
>> >
>> > If you need any additional input or show commands, please dont hesitate
>> to
>> > ask.
>> >
>> > I appreciate all hints/comments.
>> >
>> > Thanks in advance,
>> >
>> > Peter
>> > _______________________________________________
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>>
>
>