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Halt of Unified ISSU During Initialization Phase Overview
The options that are available to halt the unified in-service software upgrade depend
on the phase that the upgrade is in when you attempt to halt it. The phase also affects
the state of the router after the upgrade is halted.
During the initialization phase, you can halt the unified ISSU process by issuing the
issu stop command. This action reloads the redundant SRP module with the armed
upgrade release. As a result, unified ISSU is placed in the idle state and the following
releases are present on the router:
Related Topics
Halting Unified ISSU During Initialization Phase
After you stop unified ISSU, you can return the router to the state it was in when you
began the unified in-service software upgrade. To roll the router back to its beginning
state with the redundant SRP module running the original release, you must perform
the following steps to arm the redundant SRP module with the running release:
1.
2.
3.
4.
Primary SRP module Running (original) release
Redundant SRP module Upgrade release
Line modules Running (original) release
issu stop
Halting Unified ISSU During Initialization Phase on page 99
Halt of Unified ISSU During Upgrade Phase Overview on page 100
Halting Unified ISSU During Upgrade Phase on page 100
Turn off auto synchronization.
host1(config)#disable-autosync
Specify that the router use the running release when it reboots.
host1(config)#boot system erx_x-y-z.rel
Synchronize the NVS file system of the redundant module with that of the primary
module.
host1#synchronize
The redundant SRP module automatically reboots because the armed release
(the original release) now differs from the software release it is currently running
(the upgrade release).
Verify that stateful SRP switchover is enabled.
host1#show redundancy
Halt of Unified ISSU During Initialization Phase Overview
Chapter 4: Configuring a Unified In-Service Software Upgrade
99
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