IS-IS Adjacency issue

[ahmedhussein1]

Hi  All 

in our MPLS Network we connected two Cisco NCS-5508 by isis routing protocol and we faced issue that the NET ID for isis appear instead of the hostname :

RP/0/RP0/CPU0:ROUTER-A#show isis neighbors
Sat Jul 13 12:39:20.979 AST

IS-IS NBN-ISIS neighbors:
System Id Interface SNPA State Holdtime Type IETF-NSF
ROUTER-B Hu0/0/0/8 *PtoP* Up 24 L1L2 Capable
0372.3624.4137 BE13 *PtoP* Up 26 L1L2 Capable
ROUTER-C Hu0/3/0/2 *PtoP* Up 23 L1L2 Capable
ROUTER-D BE2 *PtoP* Up 22 L1L2 Capable

RP/0/RP0/CPU0:ROUTER-A#show isis neighbors BE13 detail
Sat Jul 13 12:39:42.913 AST

IS-IS NBN-ISIS neighbors:
System Id Interface SNPA State Holdtime Type IETF-NSF
0372.3624.4137 BE13 *PtoP* Up 23 L1L2 Capable
Area Address(es): 49.0001
IPv4 Address(es): 32.175.241.9*
IPv6 Address(es): fe80::b642:ffff:fe7a:a484*
Topologies: 'IPv4 Unicast' 'IPv6 Unicast'
Uptime: 03:30:34

appreciate if there any information about this issue  .

thank you all 

[Harold Ritter]

Hi @ahmedhussein1 ,

This will normally happen when you have overlapping hostnames. You can find out if this is the case by running the following command from ROUTER-A:

show isis hostname | i <hostname of the neighbor that does not display properly>

Regards,

[ahmedhussein1]

Hi @Harold Ritter ,

Many thanks for your advice , its worked .

hope you a good day 

[Harold Ritter]

You are very welcome @ahmedhussein1 and thanks for the feedback