Software Upgrade Process
ISSU Upgrade for Redundant Platforms
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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
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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 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
p
rocedures, 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
i
s 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 r
equest 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 r
equest 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.
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