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Cisco Bug: CSCvv71176 - Supervisor isolated from chassis after system controllers not responding on EPC&EOBC path.

Last Modified

Oct 13, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

9.3(4)

Description (partial)

Symptom:
`show module` output only shows the supervisor in the chassis:

badc-n9516-2# sho module
Mod Ports             Module-Type                       Model          Status
--- ----- ------------------------------------- --------------------- ---------
27   0    Supervisor Module                     N9K-SUP-B             active *

Mod  Sw                       Hw    Slot
---  ----------------------- ------ ----
27   9.3(4)                   2.1    SUP1

Conditions:
The following logs showing EPC & EOBC failure:

2020 Aug 28 09:03:25 badc-n9516-2 Aug 28 09:03:24 %KERN-0-SYSTEM_MSG: [9224387.760162] EMON: module 30 is not responding on EPC path. Reloading module. - kernel
2020 Aug 28 09:03:25 badc-n9516-2 %MODULE-2-MOD_DIAG_FAIL: Module 30 (Serial number: FOC21320YJ3) reported failure due to EPC heartbeat failure in device DEV_EPC_MAC (device error 0xcf51b137)
2020 Aug 28 09:03:25 badc-n9516-2 %LIBSYSMGR-3-HASEQNO_SYNC_FAILED: Unable to sync HA sequence number (0xF65F6A0) for service "nfm" (PID 15858): Connection timed out (110).
2020 Aug 28 09:03:26 badc-n9516-2 %LIBSYSMGR-3-HASEQNO_SYNC_FAILED: Unable to sync HA sequence number (0xF65F6AC) for service "nfm" (PID 15858): Connection timed out (110).
2020 Aug 28 09:03:26 badc-n9516-2 Aug 28 09:03:26 %KERN-0-SYSTEM_MSG: [9224389.361923] EMON: module 29 is not responding on EOBC path. Reloading module. - kernel
2020 Aug 28 09:03:28 badc-n9516-2 %MODULE-2-MOD_DIAG_FAIL: Module 2 (Serial number: FOC21362URP) reported failure due to EOBC heartbeat failure in device DEV_EOBC_MAC (device error 0xc0a1b137)

Modules 29&30 are both System controllers.
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