Exceptions During The Upgrade Phase; Table 19: Router Response To Undesirable Events During The Upgrade Phase - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual

Exceptions During the Upgrade Phase

Copyright © 2010, Juniper Networks, Inc.
Switches control from the primary SRP module (running the current release) to the
5.
standby SRP module (running the armed upgrade release).
Upgrades the forwarding plane on each line module at the same time. The fabric is
6.
switched and upgraded.
You can view the status of the router and the progress of the upgrade at any time by
issuing the show issu command from another terminal session to the router.
NOTE: While a unified ISSU operation is in progress, do not remove the SRP
modules or attempt to reset them. Removing the SRP modules anytime
during unified ISSU has an adverse impact.
After the unified ISSU operation is completed, issue the show version
command. The output from a successful upgrade indicates the following:
The formerly active SRP module has rebooted and come up as the new
standby SRP module.
The newly active SRP module indicates that the formerly active SRP has
rebooted and has come up as standby SRP module
You can then remove an SRP module after issuing the halt command.
Table 19 on page 111 describes the behavior of the router during the upgrade phase when
certain exceptional events take place outside the context of the unified in-service software
upgrade.
Table 19: Router Response to Undesirable Events During the Upgrade
Phase
Event Router Action
The router reloads. The unified ISSU operation halts.
The router undergoes a cold restart.
The router boots with the armed upgrade release.
The line modules reboot.
The primary SRP The unified ISSU operation halts.
module switches
The router undergoes a cold restart.
over to the standby
The router boots with the armed upgrade release.
SRP module.
The line modules reboot.
The standby SRP The unified ISSU operation halts.
module reloads.
The router undergoes a cold restart.
The router boots with the armed upgrade release.
The line modules reboot.
Chapter 5: Configuring a Unified In-Service Software Upgrade
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