cisco ASR-920-10SZ-PD | isis neighbors flapping

[soheljujara]

Hello,

isis neighbors getting flapped continually, Media are ok  

005993: Jul 4 15:41:07.973 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.83.150.105 proc:FRR, idb:TenGigabitEthernet0/0/8 handle:4 act
006006: Jul 4 15:46:11.022 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:17 neigh proc:ISIS, handle:4 active
006007: Jul 4 15:46:11.131 IST: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:17 handle:4,is going Down Reason: DETECT TIMER EXPIRED
006008: Jul 4 15:46:12.008 IST: %BFDFSM-6-BFD_SESS_UP: BFD-SYSLOG: BFD session ld:17 handle:4 is going UP
006009: Jul 4 15:46:12.092 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.83.150.105 proc:ISIS, idb:TenGigabitEthernet0/0/8 handle:4 act
006013: Jul 4 15:46:20.034 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:17 neigh proc:FRR, handle:4 active
006014: Jul 4 15:46:20.880 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.83.150.105 proc:FRR, idb:TenGigabitEthernet0/0/8 handle:4 act
006015: Jul 4 15:46:33.785 IST: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:18 handle:1,is going Down Reason: RX DOWN
006017: Jul 4 15:46:34.345 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:18 neigh proc:FRR, handle:1 active
006018: Jul 4 15:46:41.322 IST: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:18 handle:1,is going Down Reason: DETECT TIMER EXPIRED
006019: Jul 4 15:46:44.556 IST: %BFDFSM-6-BFD_SESS_UP: BFD-SYSLOG: BFD session ld:18 handle:1 is going UP
006021: Jul 4 15:46:46.968 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:17 neigh proc:FRR, handle:4 active
006022: Jul 4 15:46:48.086 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.83.150.105 proc:FRR, idb:TenGigabitEthernet0/0/8 handle:4 act
006024: Jul 4 15:47:03.290 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:17 neigh proc:ISIS, handle:4 active
006025: Jul 4 15:47:03.430 IST: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:17 handle:4,is going Down Reason: DETECT TIMER EXPIRED
006027: Jul 4 15:47:04.272 IST: %BFDFSM-6-BFD_SESS_UP: BFD-SYSLOG: BFD session ld:17 handle:4 is going UP
006028: Jul 4 15:47:04.582 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.83.150.105 proc:ISIS, idb:TenGigabitEthernet0/0/8 handle:4 act
006032: Jul 4 15:47:08.854 IST: %BFD-6-BFD_SESS_DESTROYED: BFD-SYSLOG: bfd_session_destroyed, ld:18 neigh proc:ISIS, handle:1 active
006033: Jul 4 15:47:08.928 IST: %BFDFSM-6-BFD_SESS_DOWN: BFD-SYSLOG: BFD session ld:18 handle:1,is going Down Reason: RX DOWN
006034: Jul 4 15:47:09.325 IST: %BFDFSM-6-BFD_SESS_UP: BFD-SYSLOG: BFD session ld:18 handle:1 is going UP
006035: Jul 4 15:47:09.745 IST: %BFD-6-BFD_SESS_CREATED: BFD-SYSLOG: bfd_session_created, neigh 10.67.61.14 proc:ISIS, idb:BDI355 handle:1 act

[Pedroxh]

This is your BFD working to telling you something wrong between these two equipments impact the establishment neighbor relationship. You already try to see if the Hello/Dead Timers are equal on both sides? Physically, these devices are connected by fiber or Ethernet cable?

[soheljujara]

hello and Dead timer are same, and both end Cisco 920 router and media is Fiber...

[soheljujara]

and after reboot the Device some time the flapping has been stopped for 1-2 hours..