Halt Of Unified Issu During Upgrade Phase Overview; Halting Unified Issu During Upgrade Phase - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual

Halt of Unified ISSU During Upgrade Phase Overview

Halting Unified ISSU During Upgrade Phase

Copyright © 2010, Juniper Networks, Inc.
disable-autosync
boot system
synchronize
show redundancy
During the upgrade phase—before the line module and control plane software is
upgraded—the unified ISSU process provides an opportunity to cancel the upgrade. If
you choose to cancel, the router remains in the unified ISSU initialized state. The CLI
command set becomes fully accessible.
If you do not cancel at this point, then the process continues and any line modules that
do not support unified ISSU are reloaded. Application sessions are brought down and
traffic forwarding is interrupted for the unsupported modules.
If you do cancel in response to the CLI prompt, unified ISSU returns to the initialized state,
and the following releases are present on the router:
Primary SRP module—Running (original) release
Redundant SRP module—Upgrade release; the module is in the unified ISSU initialized
state
Line modules—Running (original) release
To roll back from the unified ISSU initialized state, you must issue the issu stop command.
The command reloads the redundant SRP module with the armed release and places
unified ISSU in the idle state. As a result, the following releases are present on the router:
Primary SRP module—Running (original) release
Redundant SRP—Upgrade release
Line modules—Running (original) release
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:
Turn off auto synchronization.
1.
host1(config)#disable-autosync
Specify that the router use the running release when it reboots.
2.
host1(config)#boot system erx_x-y-z.rel
Chapter 5: Configuring a Unified In-Service Software Upgrade
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