Manual

Cisco IOS In Service Software Upgrade Process
issu acceptversion
35
Cisco IOS Release 12.2(28)SB
issu acceptversion
To halt the rollback timer and ensure the new Cisco IOS software image is not automatically aborted
during the In Service Software Upgrade (ISSU) process, use the issu acceptversion command in user
EXEC or privileged EXEC mode.
issu acceptversion {active slot-number | active slot-name slot-name}
Syntax Description
Defaults 45 minutes from the time the issu runversion command is issued to the time the issu acceptversion is
issued.
Command Modes User EXEC
Privileged EXEC
Command History
Usage Guidelines Use the issu acceptversion command to ensure that the active Route Processor (RP) is running the new
image, that the standby RP is running the old image, and that both RPs are in the run version (RV) state.
If the issu acceptversion command is not issued within 45 minutes from the time the issu runversion
command is issued, the new active RP is assumed to be unreachable, and the entire ISSU process is
automatically rolled back to the previous version of the software. The rollback timer starts immediately
after the user issues the issu runversion command.
If the rollback timer is set for a short period of time, such as 1 minute, and the standby RP is not yet in
a hot standby state, you then have 15 1-minute extensions during which the router will wait for the
standby state to become hot standby state. However, if the standby state becomes hot standby state within
the 15-minute extension, the router will abort the ISSU process because the 1-minute rollback timer has
expired. Therefore, it is not recommended to set the rollback timer shorter than the time required for the
standby state to become hot standby state.
If the rollback timer is set to a long period of time, such as the default of 45 minutes, and the standby
RP goes into the hot standby state in 7 minutes, you have 38 minutes (45 minus 7) to roll back if
necessary.
Use the configure issu set rollback timer to configure the 45-minute default value on the rollback timer.
active slot-number The specified active slot on your networking device. Refer to your hardware
documentation for information on the number of slots on your networking
device.
active slot-name
slot-name
Identifies a specific slot name.
Release Modification
12.2(28)SB This command was introduced.
12.2(31)SGA This command was integrated into Cisco IOS Release 12.2(31)SGA.