Symptom

When BLB host LC is reloaded. Local router reports FIA disable_dequeue: 0/RSP1/ADMIN0:Jul 5 08:36:55.070 UTC: shelf_mgr[4732]: %INFRA-SHELF_MGR-6-USER_ACTION : User (127.0.0.1) requested CLI action 'graceful card reload' for location 0/0 LC/0/0/CPU0:Jul 5 08:36:55.133 UTC: processmgr[51]: Received a graceful shutdown request 0/0/ADMIN0:Jul 5 08:36:55.074 UTC: cm[3370]: %ROUTING-TOPO-5-PROCESS_UPDATE : Got process update: Card shutdown. LC/0/0/CPU0:Jul 5 08:36:55.155 UTC: fialc[230]: ts_dll_disable_dequeue called LC/0/0/CPU0:Jul 5 08:36:55.161 UTC: fialc[230]: ts_dll_disable_dequeue called LC/0/0/CPU0:Jul 5 08:36:55.224 UTC: bfd_agent[295]: %L2-BFD-6-SESSION_REMOVED : BFD session to neighbor 192.168.12.1 on interface Bundle-Ether200 has been removed LC/0/0/CPU0:Jul 5 08:36:57.141 UTC: fialc[230]: ts_dll_disable_dequeue called On Peer router, BFD and protected IGP flap once. LC/0/3/CPU0:Jul 5 08:36:57.550 UTC: bfd_agent[127]: %L2-BFD-6-SESSION_STATE_DOWN : BFD session to neighbor 192.168.12.2 on interface Bundle-Ether200 has gone down. Reason: Control timer expired RP/0/RSP0/CPU0:Jul 5 08:36:57.551 UTC: isis[1017]: %ROUTING-ISIS-5-ADJCHANGE : Adjacency to ASR-9906-B (Bundle-Ether200) (L2) Down, BFD session DOWN RP/0/RSP0/CPU0:Jul 5 08:37:01.456 UTC: icpe_satmgr[1212]: %PKT_INFRA-UTIL_RETRY_HANDLER-6-EXTENDED_RETRY_PERIOD : Retries have been occurring for an extended period of time (328838 seconds) for ORBIT Connection LC/0/3/CPU0:Jul 5 08:37:04.237 UTC: bfd_agent[127]: %L2-BFD-6-SESSION_DAMPENING_ON : Session to neighbor 192.168.12.2 on interface Bundle-Ether200 entered Dampened state (initial: 2000 ms,secondary: 5000 ms,maximum: 120000 ms). RP/0/RSP0/CPU0:Jul 5 08:37:04.239 UTC: isis[1017]: %ROUTING-ISIS-5-ADJCHANGE : Adjacency to ASR-9906-B (Bundle-Ether200) (L2) Up, New adjacency LC/0/3/CPU0:Jul 5 08:37:06.884 UTC: bfd_agent[127]: %L2-BFD-6-SESSION_DAMPENING_OFF : Session to neighbor 192.168.12.2 on interface Bundle-Ether200 moved out of Dampened state. LC/0/3/CPU0:Jul 5 08:37:06.884 UTC: bfd_agent[127]: %L2-BFD-6-SESSION_STATE_UP : BFD session to neighbor 192.168.12.2 on interface Bundle-Ether200 is up

Conditions

1. Running XR 6.5.2 or later 2. Reload BLB host LC

Workaround

migrate BLB host LC to another LC manually by following CLI: no multipath include location Please make sure there're other host LCs in configuration.

Further Problem Description