Hi. I am trying to downgrade the IOS versions (03.08.04.E⇒03.06.02.E) of a 4500 VSS pair in the lab using the method here. I am getting into trouble when I reload the standby switch on step 9 ( redundancy reload peer) with the error message below:
*Aug 28 11:51:35.201: %C4K_REDUNDANCY-2-IOS_VERSION_CHECK_FAIL: STANDBY:IOS version mismatch. Active supervisor version is 15.2(4)E4 (cat4500e-UNIVERSALK9-M). Standby supervisor version is 15.2(2)E2 (cat4500e-UNIVERSALK9-M). Redundancy feature may not work as expected.
*Aug 28 11:51:35.201: %C4K_REDUNDANCY-2-NON_SYMMETRICAL_REDUNDANT_SYSTEM: STANDBY:STANDBY supervisor will operate in fallback redundancy mode rpr.
*Aug 28 11:51:38.229: %C4K_REDUNDANCY-3-COMMUNICATION: STANDBY:Communication with the peer Supervisor has been established
*Aug 28 11:51:38.956: %C4K_REDUNDANCY-2-VS_REBOOT_ON_RPR_FALLBACK: STANDBY:Supervisor in virtual-switch configuration cannot operate in redundancy mode RPR, will be reset
*Aug 28 11:51:39.038: %RF-5-RF_RELOAD: STANDBY:Self Reload. Reason: Virtual-switch fallback to RPR
The pair is working fine with VSS on the 03.08.04 version.
Please find the output of the logs below:
Switch#show switch virtual
Executing the command on VSS member switch role = VSS Active, id = 2
Switch mode : Virtual Switch
Virtual switch domain number : 1
Local switch number : 2
Local switch operational role: Virtual Switch Active
Cannot execute command on peer supervisor because it is not in SSO Standby state
Switch#
Switch#show redundancy
Redundant System Information :
------------------------------
Available system uptime = 4 weeks, 21 hours, 57 minutes
Switchovers system experienced = 11
Standby failures = 4
Last switchover reason = user_forced
Hardware Mode = Simplex
Configured Redundancy Mode = Stateful Switchover
Operating Redundancy Mode = Stateful Switchover
Maintenance Mode = Disabled
Communications = Down Reason: Simplex mode
Current Processor Information :
------------------------------
Active Location = slot 2/1
Current Software state = ACTIVE
Uptime in current state = 1 hour, 19 minutes
Image Version = Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.08.04.E RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2017 by Cisco Systems, Inc.
Compiled Thu 06-Apr-17 11:04 by prod
BOOT = bootflash:cat4500e-universalk9.SPA.03.06.02.E.152-2.E2.bin,1;
Configuration register = 0x2
Peer (slot: 1/1) information is not available because it is in 'DISABLED' state
Switch#
Switch#show license image level
Module name Image level Priority Configured Valid license
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WS-C4500X-16 entservices 1 NO entservices
ipbase 2 NO ipbase
Module Name Role Current Level Reboot Level
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WS-C4500X-16 Active ipbase ipbase
