Re: ipv6 connectivity bugs

[Dave Bell <me () geordish org>]

Do you have anything in the way of COPP on either box that may be
dropping packets? I would imagine the issue is likely to be on the
AS1k end.

Additionally I see you have different interface speeds at each side.
Is the thing in the middle at fault? ND is done using multicast.

One final thing is attempt to ping across the link local addresses.
Make you you set the source address correctly.

Regards,
Dave

On 19 October 2015 at 12:39, Mike <mike-nanog () tiedyenetworks com> wrote:
> Hello,
>
>     I have a 7201 and an ASR1000 and they share a link and run ipv4 and bgp
> over it no problem.
>
>     I am experimenting and have now added some static ipv6 configuration,
> and I can't seem to ping across the link. The issue looks like one side us
> advertising prefixes correctly and the other isn't. Here's my interface
> configs:
>
>
> ASR1000:
>
> interface TenGigabitEthernet0/1/0.110025
>   encapsulation dot1Q 25 second-dot1q 11
>  ip address x.x.x.1 255.255.255.248
>  ipv6 address xxxx:yyyy::1:1/126
> end
>
> 7201:
>
> interface GigabitEthernet0/0.110025
>   encapsulation dot1Q 25 second-dot1q 11
>  ip address x.x.x.2 255.255.255.248
>  ipv6 address xxxx:yyyy::1:2/126
> end
>
> When I try pinging 7201 from the asr1000, no response. I do see a neighbor
> entry on the asr1000:
>
> sh ipv6 neighbors
> IPv6 Address                              Age Link-layer Addr State
> Interface
> xxxx:yyyy::1:2                              0 xxxx.yyyy.8e1b  REACH
> Te0/1/0.110025
> FE80::xxxx:yyyy:FE49:8E1B                   0 xxxx.yyyy.8e1b  REACH
> Te0/1/0.110025
>
>
> On the 7201 however, there seems to only be the link local address neighbor
> entry for the asr1000:
>
> sh ipv6 neighbors
> IPv6 Address                              Age Link-layer Addr State
> Interface
> FE80::xxxx:yyyy:FE2D:D190                   0 xxxx.yyyy.d190  STALE
> Gi0/0.110025
>
>
> Can anyone spot what I am doing wrong?
>
> Mike-