Symptom
Cat9300 stack, running IOS version with SMU file installed, shows version mismatch when upgrading if the SMU were deleted from the flash. Members go down showing error:
Mar 17 17:20:53.100: %BOOT-3-BOOTTIME_SMU_MISSING_DETECTED: R0/0: install_engine: SMU file /flash/cat9k_iosxe.17.03.03.CSCvw65439.SPA.smu.bin missing and system impact will be unknown
On the members that stay up , the error below is shown:
*Mar 17 16:59:14.513: %BOOT-5-BOOTTIME_SMU_RUN_MISMATCH_DETECTED: Switch 1 R0/0: issu_stack: Running SMU mismatch from active dectected. System will try to correct it, switch 2 will be reloaded
*Mar 17 17:00:23.876: %BOOT-5-BOOTTIME_RB_SYNC_FAILED: Switch 1 R0/0: issu_stack: Failed to sync the SMUs to switch 2. Install rollback operation may get affected.
Conditions
-SMU file was installed on previous version / current ,
- Issue is triggered if the SMU file is deleted from the flash on one o more members and upgrade to a new version is performed.
Workaround
Deleting the .PATCH and .PATCH-backup files from the flash: on all the mebers and reload allows the stack to be restored.
