I had an oops with a recent code upgrade on our 4510R+E Sup7 routers. I successfully upgraded from an older crypto version of code to the latest non-crypto. When trying to correct this (as no one should want to use telnet for remote access rather than ssh), I ran in to the following:
Feb 28 09:11:36: %C4K_REDUNDANCY-2-IOS_VERSION_CHECK_FAIL: IOS version mismatch. Active supervisor version is 15.1(2)SG (cat4500e-UNIVERSAL-M). Standby supervisor version is 15.1(2)SG (cat4500e-UNIVERSALK9-M). Redundancy feature may not work as expected.
The standby supervisor stays at "STANDBY COLD", and continuing the upgrade will require a service outage. Very dissappointing, since it's the exact same rev of code, just changing from universal-m to universalk9-m.
Redundant System Information :
------------------------------
Available system uptime = 2 weeks, 5 days, 46 minutes
Switchovers system experienced = 1
Standby failures = 12
Last switchover reason = active unit failed
Hardware Mode = Duplex
Configured Redundancy Mode = Stateful Switchover
Operating Redundancy Mode = RPR
Reason: Unknown
Maintenance Mode = Disabled
Communications = Up
Current Processor Information :
------------------------------
Active Location = slot 5
Current Software state = ACTIVE
Uptime in current state = 2 weeks, 5 days, 36 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSAL-M), Version 03.04.00.SG RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Wed 05-Dec-12 05:58 by prod_r
BOOT = bootflash:cat4500e-universal.SPA.03.04.00.SG.151-2.SG.bin,1;
Configuration register = 0x2102
Peer Processor Information :
------------------------------
Standby Location = slot 6
Current Software state = STANDBY COLD
Uptime in current state = 7 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.04.00.SG RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Wed 05-Dec-12 04:38 by pro
BOOT = bootflash:cat4500e-universal.SPA.03.04.00.SG.151-2.SG.bin,1;
Configuration register = 0x2102
