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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 8 Configuring the Cisco IOS XE In Service Software Upgrade Process
How to Perform the ISSU Process
Switch(config-if)#
end
Switch#
Your configuration will appear as follows.
ip vrf mgmtVrf
!
interface FastEthernet1
ip vrf forwarding mgmtVrf
ip address 10.1.1.1 255.255.255.0
speed auto
duplex auto
ipv6 address 2000::1/64
Verifying the ISSU Software Installation
During the ISSU process, there are five valid states: disabled, init, load version, run version, and system
reset. Use the
show issu state
command to obtain the current ISSU state:
•
Disabled state—The state for the standby supervisor engine while this engine is resetting.
•
Init state—The initial state for two supervisor engines, one active and one standby, before the ISSU
process is started. It is also the final state after the ISSU process completes.
•
Load version (LV) state—The standby supervisor engine is loaded with the new version of Cisco
IOS XE software.
•
Run version (RV) state—The
issu runversion
command forces the switchover of the supervisor
engines. The newly active supervisor engine runs the new Cisco IOS XE software image.
•
While running ISSU, if both supervisor engines are reset due to power outage, for example, the ISSU
context is lost and returns to the init state. Both supervisor engines return to the old software.
You can verify the ISSU software upgrade by entering
show
commands to provide information on the
state of the during the ISSU process:
This example shows how to display the state and the current status of the supervisor engine during the
ISSU process:
Switch>
enable
Switch#
show issu state
Switch#
show redundancy
Verifying Redundancy Mode Before Beginning the ISSU Process
Before you begin the ISSU process, verify the redundancy mode for the system and be sure to configure
NSF and SSO.
Command or Action
Purpose
Step 1
Switch>
enable
Enables privileged EXEC mode.
Enter your password if prompted.
Step 2
Switch#
show issu state
[
detail]
Displays the state of the during the ISSU process.
Step 3
Switch#
show redundancy
Displays current or historical status, mode, and related
redundancy information about the device.
Summary of Contents for Catalyst 4500 Series
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