[c-nsp] ASR1k to ASR9k CLNS MTU problems

[Matt Addison]

Sent from my mobile device, so please excuse any horrible misspellings.

On May 27, 2013, at 8:36, Adam Vitkovsky <adam.vitkovsky at swan.sk> wrote:

> Hi Folks,
> Has anyone encountered ISIS/CLNS MTU issues between ASR1k and ASR9k please?
>
> sh isis int / sh clns int
> - shows MTU:  9177 on both ends.
>
> debug isis adj-packets / debug isis adj det
> - shows that both routers are sending IIHs with Length 9177 -though they do
> not receive any IIHs from each other.
>
> Only after I have instructed both routers to never pad IIHs (no to check
> mtu) the adjacency came up.
> So they clearly have problems with CLNS MTU.
>
> A1k  XE 15.3(1)S1
> interface GigabitEthernet0/0/2
> mtu 9180
>
> A9k XR 4.2.3
> interface Bundle-Ether201.3206
> mtu 9198

What's the full config on the Bundle interface, given the subinterface
 on thr 9k (and none on 1k) I'm guessing there's some layer 2
transport involved here? Are you sure that accommodates your MTU?