Contents
10
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL-30933-01
Changeversion Deployment Scenario 6-13
Aborting an In-Progress Changeversion Procedure 6-13
Guidelines for Performing ISSU 6-13
Versioning Capability in Cisco IOS Software to Support ISSU 6-13
Compatibility Matrix 6-14
SNMP Support for ISSU 6-15
Compatibility Verification Using Cisco Feature Navigator 6-15
Performing the ISSU Process 6-15
Upgrading ISSU to Cisco IOS XE 3.4.0SG/15.1(2)SG from a Prior Release 6-16
Downgrading ISSU from Cisco IOS XE 3.4.0SG/15.1(2)SG to a Prior Release 6-17
Verifying the ISSU Software Installation 6-18
Verifying Redundancy Mode Before Beginning the ISSU Process 6-19
Verifying the ISSU State Before Beginning the ISSU Process 6-20
Loading New Cisco IOS Software on the Standby Supervisor Engine 6-21
Switching to the Standby Supervisor Engine 6-24
Stopping the ISSU Rollback Timer (Optional) 6-26
Loading New Cisco IOS Software on the New Standby Supervisor Engine 6-27
Using changeversion to Automate an ISSU Upgrade 6-29
Aborting a Software Upgrade During ISSU 6-34
Configuring the Rollback Timer to Safeguard Against Upgrade Issues 6-35
Displaying ISSU Compatibility Matrix Information 6-36
Displaying ISSU Compatibility Matrix Information 6-40
Related Documents 6-42
Configuring the Cisco IOS XE In Service Software Upgrade Process 7-1
Related Documents 7-2
Prerequisites to Performing ISSU 7-2
About Performing ISSU 7-3
Stateful Switchover 7-3
NSF 7-5
ISSU Process 7-6
Performing an ISSU Upgrade: 2 Methods 7-11
Changeversion Process 7-12
Changeversion: Quick Option (LV to INIT) 7-12
Scheduled Changeversion: “in” and “at” Options 7-12
Changeversion Deployment Scenario 7-13
Aborting an In-Progress Changeversion Procedure 7-13
Guidelines for Performing ISSU 7-13
Compatibility Matrix 7-13
SNMP Support for ISSU 7-14
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