Cisco switch: MDS 9700 Standby supervisor in reboot loop

Summary: During upgrade, standby supervisor goes into reboot loop - manual poweroff/on of standby supervisor required to recover.

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Symptoms

In Service software upgrade [ISSU] started 

During NX-OS ISSU upgrade, standby supervisor goes into reboot loop.
From console can be observed : the supervisor was trying to mount a USB device, and once entering run level 3 it reboots again.

Exception log message: 

0x40c90000 Not able to mount filesystem on OBFL flash Error Description: Not able to mount filesystem on OBFL flash Logging log streaming errors: %USBHSD-STANDBY-2-MOUNT: logflash: Online %PLATFORM-2-MOD_REMOVE: Module X removed (Serial number XXXXXXXXXXXX)


Cause

The standby supervisor is trying to mount a USB device, and once entering run level 3 it reboots again.
0x40c90000 Not able to mount filesystem on OBFL flash Error Description: Not able to mount filesystem on OBFL flash

Resolution

From active supervisor:
  1. Out of service module X [where X is the standby supervisor]
  2. No poweroff module X
  3. Confirm that standby supervisor is HA standby using CLI: Show system redundancy status
Once standby supervisor has been recycled and is back in HA standby, you can proceed with the switch non-disruptive [ISSU] code upgrade.

Affected Products

Connectrix MDS-9710, Connectrix MDS-Series Firmware

Products

Connectrix MDS-9710, Connectrix MDS-Series Firmware 6.X, Connectrix MDS-Series Firmware 7.X, Connectrix MDS-Series Firmware 8.X, Connectrix MDS-Series Firmware 9.X
Article Properties
Article Number: 000064949
Article Type: Solution
Last Modified: 19 Jun 2023
Version:  3
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