[c-nsp] ASR1k to ASR9k CLNS MTU problems

[Adam Vitkovsky]

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


adam