Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE 2010-10-08 Configuration Manual page 163

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Determine whether unified ISSU is in the Idle state and whether all upgrade
10.
requirements have been met.
host1#show issu
NOTE: If the results indicate that some requirements are not met, you
must correct this situation before proceeding.
Ensure that stateful SRP switchover is configured on the router.
11.
host1#show redundancy srp
If it is not already configured, do so now.
host1(config)#redundancy
host1(config-redundancy)#mode high-availability
For each configured protocol on the router and its neighbors, ensure that graceful
12.
restart is configured. See the relevant protocol configuration chapters in the JunosE
document set for information about configuring graceful restart.
Begin the initialization phase of the unified in-service software upgrade.
13.
host1#issu initialize
The CLI displays the status of the initialization as it proceeds.
(Optional) From a different CLI session, display the progress of the initialization.
14.
host1#show issu
Unified ISSU must be in the Initialized state before you proceed to the next step. The
time required for initialization varies with the system load and the complexity of the
router configuration.
Start the upgrade phase.
15.
host1#issu start
The router switches to the redundant SRP module running the upgrade release, R2.rel.
Significant upgrade milestones are displayed as they occur.
When the console indicates that the upgrade is completed, you can verify that the
16.
router is back in the idle state and running the upgrade release, R2.rel.
host1#show issu
You can also verify the status of the SRP modules and line modules, as well as the
running and armed releases.
host1#show version
issu initialize
issu start
issu stop
license issu
Chapter 5: Configuring a Unified In-Service Software Upgrade
141