Cisco Catalyst 4500 series Administration Manual page 325

Chapter 6 Configuring the Cisco IOS In-Service Software Upgrade Process
The new active supervisor engine is now running the new version of software, and the standby supervisor
Note
engine is running the old version of software and is in the standby hot state.
Switch# show redundancy states
Redundancy Mode (Operational) = Stateful Switchover
Redundancy Mode (Configured)
Redundancy State
Maintenance Mode = Disabled
Manual Swact = enabled
Communications = Up
client count = 39
client_notification_TMR = 240000 milliseconds
keep_alive threshold = 18
Once runversion command completes, the new active supervisor engine is running the new version of
software and the previously active supervisor engine now becomes the standby supervisor engine. The
standby is reset and reloaded, but remains on the previous version of software and come back online in
standbyhot status. The following example shows how to verify these conditions:
Switch# show redundancy
Redundant System Information :
------------------------------
Switchovers system experienced = 1
Configured Redundancy Mode = Stateful Switchover
Current Processor Information :
-------------------------------
(cat4500-ENTSERVICES-M), Version 12.2(31)SGA, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Tue 05-Sep-06 16:16 by sanjdas
OL-30933-01
Boot Variable = bootflash:old_image,12
Operating Mode = Stateful Switchover
Primary Version = bootflash:new_image
Secondary Version = bootflash:old_image
Current Version = bootflash:old_image
my state = 13 -ACTIVE
peer state = 8 -STANDBY HOT
Mode = Duplex
Unit = Secondary
Unit ID = 2
keep_alive TMR = 9000 milliseconds
keep_alive count = 1
RF debug mask = 0x0
Available system uptime = 23 minutes
Standby failures = 0
Last switchover reason = user forced
Hardware Mode = Duplex
Operating Redundancy Mode = Stateful Switchover
Maintenance Mode = Disabled
Communications = Up
Active Location = slot 2
Current Software state = ACTIVE
Uptime in current state = 11 minutes
Image Version = Cisco IOS Software, Catalyst 4500 L3 Switch Software
BOOT = bootflash:new_image,12;bootflash:old_image,12
Configuration register = 0x822
= Stateful Switchover
= Stateful Switchover
Software Configuration Guide—Release IOS XE 3.6.0SG and IOS 15.2(2)SG
Performing the ISSU Process
6-25