Configuring The Rollback Timer To Safeguard Against Upgrade Issues - Cisco Catalyst 4500 Series Configuration Manual

How to Perform the ISSU Process
Switch# issu abortversion 6
% issu abortversion initiated successfully
Switch# show issu state detail
Switch#

Configuring the Rollback Timer to Safeguard Against Upgrade Issues

Cisco IOS XE software maintains an ISSU rollback timer, to safeguard against an upgrade that may leave
the new active supervisor engine in a state in which communication with the standby supervisor engine
is severed.
You may want to configure the rollback timer to fewer than 45 minutes (the default) so that the user need
not wait in case the new software is not committed or the connection to the switch was lost while it was
in runversion mode. A user may want to configure the rollback timer to more than 45 minutes in order
to have enough time to verify the operation of the new Cisco IOS XE software before committing the
new software image.
Note The valid timer value range is from 0 to 7200 seconds (two hours). A value of 0 seconds disables the
rollback timer.
Once you are satisfied that the new image at the active supervisor engine has been successful and you
want to remain in the current state, you may indicate acceptance by issuing the issu acceptversion
command, which stops the rollback timer.
Issuing the issu commitversion command at this stage is equal to entering both the issu acceptversion
and the issu commitversion commands. Use the issu commitversion command if you do not intend to
run in the current state for a period of time and are satisfied with the new software version.
The rollback timer can be configured only in the ISSU Init state.
Note
This task explains how to configure the rollback timer:
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
6-32
RP State = Standby
ISSU State = Run Version
Operating Mode = Stateful Switchover
Current Image = bootflash:y.bin
Pre-ISSU (Original) Image = bootflash:y.bin
Post-ISSU (Targeted) Image = bootflash:x.bin
Slot = 5
RP State = Active
ISSU State = Init
Operating Mode = Stateful Switchover
Current Image = bootflash:y.bin
Pre-ISSU (Original) Image = N/A
Post-ISSU (Targeted) Image = N/A
Slot = 6
RP State = Standby
ISSU State = Init
Operating Mode = Stateful Switchover
Current Image = bootflash:y.bin
Pre-ISSU (Original) Image = N/A
Post-ISSU (Targeted) Image = N/A
Chapter 6 Configuring the Cisco IOS XE In Service Software Upgrade Process
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