I am currently getting topology mismatches and adjacency changes on a router, and it is happening quit frrequently. There error messages that I am getting is
Dec 4 10:39:31 cr01.brgn.monmouth.com 370: Dec 4 10:39:30: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) Down, hold time expired
Dec 4 10:39:31 cr01.brgn.monmouth.com 371: Dec 4 10:39:30: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) topology mismatched, TID (2) not in remote IIH
Dec 4 10:39:34 cr01.brgn.monmouth.com 372: Dec 4 10:39:33: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) Up, new adjacency
Dec 4 10:40:07 cr01.brgn.monmouth.com 373: Dec 4 10:40:06: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) Down, hold time expired
Dec 4 10:40:07 cr01.brgn.monmouth.com 374: Dec 4 10:40:06: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) topology mismatched, TID (2) not in remote IIH
Dec 4 10:40:10 cr01.brgn.monmouth.com 375: Dec 4 10:40:09: %CLNS-5-ADJCHANGE: ISIS (MTT): Adjacency to 2091.9101.4005 (GigabitEthernet0/3.551) Up, new adjacency
The config has not been changed in over 3 years, and this just started happening a few days ago. Also, the other router, has not had any isis changes as well in over 3 years. Need help on solving this issue.