Cisco Catalyst 4500 Series Administration Guide

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Software Configuration Guide—Release IOS XE 3.6.0SG and IOS 15.2(2)SG
OL-30933-01
Chapter 6 Configuring the Cisco IOS In-Service Software Upgrade Process
Performing the ISSU Process
5 -rwx 13636500 Sep 6 2006 09:32:33 +00:00 old_image
6 -rwx 13636500 Sep 6 2006 09:34:07 +00:00 new_image
61341696 bytes total (1111388 bytes free)
Switch# dir slavebootflash:
Directory of slavebootflash:/
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5 -rwx 13636500 Sep 6 2006 09:42:13 +00:00 new_image
61341696 bytes total (1116224 bytes free)
Loading New Cisco IOS Software on the Standby Supervisor Engine
This task describes how to use ISSU to load a new version of Cisco IOS software to the standby
supervisor engine.
Prerequisites
• Ensure that the new version of Cisco IOS software image is already present in the file system of both
the active and standby supervisor engines. Also ensure that appropriate boot parameters (BOOT
string and config-register) are set for the standby supervisor engine.
Note The switch must boot with the BOOT string setting before the ISSU procedure is attempted.
Note auto-boot must be enabled for ISSU to succeed.
• Optionally, perform additional tests and commands to determine the current state of peers and
interfaces for later comparison.
• Ensure the system (both active and standby supervisor engines) is in SSO redundancy mode. If the
system is in RPR mode rather than SSO mode, you can still upgrade the system using the ISSU CLI
commands, but the system experiences extended packet loss during the upgrade.
Refer to the Stateful Switchover document for more details on how to configure SSO mode on
supervisor engines.
• For ISSU to function, the image names on the active and standby supervisor engines must match.
Perform this task at the active supervisor engine:

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E