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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
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Chapter 4 Software Upgrade Process
ISSU Upgrade for Redundant Platforms
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In Service One-Shot Software Upgrade Procedure
In service one-shot software upgrade procedure is an alternate to the standard ISSU procedure (see,
ISSU
Upgrade Procedures, page 4-5
) that enables you to upgrade or downgrade software using a single
command. One-shot ISSU needs minimal user intervention or monitoring. Unlike the standard ISSU
procedures, once the upgrade is initiated, the upgrade process cannot be cancelled.
The one-shot upgrade procedure is divided into stages. When a failure occurs, the command execution
is stalled and users have to perform the rollback tasks manually. Necessary switchovers are automatically
taken care of in one of the upgrade stages. During a switchover, the console and its output are lost.
Additional commands are used to connect back to the console.
Note
One-shot upgrade does not support multiple upgrades at the same time.
The command
request platform software package install node file <consolidated file name>
interface-module-delay <secs>
is used for the one-shot ISSU procedure.
interface-module-delay is an optional parameter.
Example:
router#request platform software package install node file bootflash
interface-module-delay 1
The SIP-delay option enables you to delay the SIP restart duration thus enabling you to choose the restart
time to minimize traffic loss.
The
request platform software package install node file attach
command enables the users to view
the last run log that contains the reports of all the stages of the one-shot upgrade.
ISSU Procedures (Prior to Cisco IOS XE Release 2.1.2)
These instructions should be followed only if you are upgrading using ISSU to a pre-Cisco IOS XE 2.1.2
release. If you are using Cisco IOS XE Release 2.2.1 or later, follow the earlier instructions in this
chapter to perform your ISSU upgrade.