Cisco Cisco IOS Software Releases 12.2 MC
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ISSU - HSRP
The HSRP - ISSU feature enables support for ISSU in HSRP.
The In Service Software Upgrade (ISSU) process allows Cisco IOS software to be updated or otherwise
modified while packet forwarding continues. In most networks, planned software upgrades are a
significant cause of downtime. ISSU allows Cisco IOS software to be modified while packet forwarding
continues, which increases network availability and reduces downtime caused by planned software
upgrades. This document provides information about ISSU concepts and describes the steps taken to
perform ISSU in a system.
modified while packet forwarding continues. In most networks, planned software upgrades are a
significant cause of downtime. ISSU allows Cisco IOS software to be modified while packet forwarding
continues, which increases network availability and reduces downtime caused by planned software
upgrades. This document provides information about ISSU concepts and describes the steps taken to
perform ISSU in a system.
Configuration Information
Configuration information is included in the
document.
at the following URL:
The following sections provide information about this feature:
•
Information About Performing ISSU
•
How to Perform the ISSU Process
For more information about support for this feature on Cisco Catalyst 4500 series switches, see the
Configuring the Cisco IOS In Service Software Upgrade Process
section of the
Catalyst 4500 Series
Switch Cisco IOS Software Configuration Guide
, Release 12.2(31)SGA.
New or Modified Commands
The following commands are new or modified for this feature:
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