Symptom

After an upgrade, an ACI Spine switch's standby supervisor does not come up and "show module" only shows that the module as "inserted." spine# show module Mod Ports Module-Type Model Status --- ----- ----------------------------------- ------------------ ---------- 1 32 32p 40/100G Ethernet Module N9K-X9732C-EX ok 2 32 32p 40/100G Ethernet Module N9K-X9732C-EX ok 22 0 Fabric Module N9K-C9504-FM-E ok 23 0 Fabric Module N9K-C9504-FM-E ok 24 0 Fabric Module N9K-C9504-FM-E ok 26 0 Fabric Module N9K-C9504-FM-E ok 27 0 Supervisor Module N9K-SUP-B active 28 - - - inserted <- Standby supervisor showing as "inserted" 29 0 System Controller N9K-SC-A active 30 0 System Controller N9K-SC-A standby When the console of the standby supervisor is accessed, the module is in "loader>" mode on the command line. "show system reset-reason" looks like the following spine# show system reset-reason ----- reset reason for Supervisor-module 27 (from Supervisor in slot 27) --- 0) At 2016-12-12T09:02:34.986 Reason: reset-by-installer Service:Upgrade Version: 12.0(1q) 1) At 2016-09-10T03:15:20.076 Reason: reset-requested-by-cli-command-reload Service:PolicyElem Ch reload Version: 12.0(1q) ----- reset reason for Supervisor-module 27 (from Supervisor in slot 28) --- ----- reset reason for Supervisor-module 28 (from Supervisor in slot 28) --- ----- reset reason for Supervisor-module 28 (from Supervisor in slot 27) --- 0) At 2017-01-12T13:08:07.182 Reason: reset-of-standby-by-active-sup-due-to-sysmgr-timeout Service: Version: 1) At 2016-12-12T09:02:36.220 Reason: reset-by-installer Service:Upgrade Version: 2) At 2016-09-09T22:35:29.738 Reason: reset-by-installer Service:Upgrade Version:

Conditions

Running affected version.

Workaround

Connect to console and either boot up current or a new image.

Further Problem Description