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Xr-to-IOS IS-IS Adjacency issue.

imadhassan
Level 1
Level 1

Hi,  I have configured  IS-IS between the two routers in which one is  XR router. The adjacency between the is stuck on "INIT" state, I want to create L2 adjacency.

Below is the OUTPUT of logging  for IS-IS I have applied on XR router, kindly anybody tell me what is the meaning of the following error ?

 


XR:Jun  8 18:54:21.787 : isis[1006]: SEND P2P IIH (L1L2) on GigabitEthernet0/0/0/0: Do IETF 3-way handshake: State DOWN; Local Ext Circuit Number 0xb00; Nbor System ID N/A, Nbor Ext. Circuit Number N/A

XR:Jun  8 18:54:21.787 : isis[1006]: SEND P2P IIH (L1L2) on GigabitEthernet0/0/0/0: Holdtime 30s, Length 72
XR:Jun  8 18:54:21.787 : isis[1006]: SCHED P2P IIH (L1L2) on GigabitEthernet0/0/0/0: Send IIH in 8.15s ... (requested non-jittered delay was 10.00s)

XR:Jun  8 18:54:29.956 : isis[1006]: SEND P2P IIH (L1L2) on GigabitEthernet0/0/0/0: Do IETF 3-way handshake: State DOWN; Local Ext Circuit Number 0xb00; Nbor System ID N/A, Nbor Ext. Circuit Number N/A
XR:Jun  8 18:54:29.956 : isis[1006]: SEND P2P IIH (L1L2) on GigabitEthernet0/0/0/0: Holdtime 30s, Length 72

 

Regards.

1 Reply 1

Renan Abreu
Cisco Employee
Cisco Employee

Have you checked MTU mismatch? XR and regular IOS calculates MTU differently.

You can use "clns mtu" to solve clns adjacency MTU issues.