IS-IS Interface CISCO_XR (No cfg topology can participate)

[kauemoncao200]

In this situation, my Router_A not established a IS-IS session witch other Router_B, and this is a information on interface

This is a network /30, ARP ok conectivity ok 

I apply a reboot on router, but not successfuly, 

I replaces with another network /30 in router and peer router but the status of (No cfg topology can participate)  kept

RP/0/RP0/CPU0:Router_A#show isis interface Te0/0/0/19
Thu Feb 1 16:22:32.096 -03

TenGigE0/0/0/19 Enabled
Adjacency Formation: Disabled (No cfg topology can participate) <<<<<<<<<<<<<<<<<<<<<< 
Prefix Advertisement: Disabled (Suppressed in IS-IS cfg)
IPv4 BFD: Enabled
IPv6 BFD: Disabled
BFD Min Interval: 100
BFD Multiplier: 3
Bandwidth: 10000000

Circuit Type: level-2-only
Media Type: P2P
Circuit Number: 0
Measured Delay: Min:- Avg:- Max:- usec
Delay Normalization: Interval:0 Offset:0
Normalized Delay: Min:- Avg:- Max:- usec

RP/0/RP0/CPU0:Router_A#show arp | i 0/19
Thu Feb 1 16:29:54.470 -03
201.1.227.232 - a411.bb3d.7a17 Interface ARPA TenGigE0/0/0/19
201.1.227.233 00:10:00 1c3d.2f3b.71c7 Dynamic ARPA TenGigE0/0/0/19

RP/0/RP0/CPU0:i-br-ma-sls-cc5-hl5g-01#ping 201.1.227.233 source 201.1.227.232
Thu Feb 1 16:30:01.745 -03
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 201.1.227.233, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
RP/0/RP0/CPU0:Router_A#

[Jose Nava Nieto · Accepted solution]

Hello kauemoncao200,

Can you share the configuration?
I've seen this before if ISIS is configured with single-topology, but you don't enable ipv6 address family on the interface.
This will trigger this issue.

[kauemoncao200]

Thanks for the information Srs. 

I remove the ipv6 unicast family on Isis and the adjacency is Go to UP, 

Very good and interesant guys. 

Thanksss

[Ruben Cocheno]

@kauemoncao200 

Can you check if you have "address-family ipv4 unicast" in ISIS?