Downgrading Issu From Cisco Ios Xe 3.4.0Sg/15.1(2)Sg To A Prior Release - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 7 Configuring the Cisco IOS In-Service Software Upgrade Process
Switch(config-if)# end
Your configuration will appear as follows.
vrf definition mgmtVrf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
interface FastEthernet1
vrf forwarding mgmtVrf
ip address 10.1.1.1 255.255.255.0
speed auto
duplex auto
ipv6 address 2000::1/64

Downgrading ISSU from Cisco IOS XE 3.4.0SG/15.1(2)SG to a Prior Release

Because a Cisco IOS XE 3.4.0SG/15.1(2)SG image uses a new CLI format and prior images use earlier
CLI formats, the downgrade procedure include the following:
•
•
•
A configuration like the following will appear on a switch running a Cisco IOS XE 3.4.0SG/15.1(2)SG
image:
vrf definition mgmtVrf
!
address-family ipv4
exit-address-family
!
address-family ipv6
exit-address-family
!
interface FastEthernet1
vrf forwarding mgmtVrf
ip address 10.1.1.1 255.255.255.0
speed auto
duplex auto
ipv6 address 2000::1/64
!
Perform a downgrade to a release prior to Cisco IOS XE 3.4.0SG/15.1(2)SG.
Step 1
Switch# config t
Enter configuration commands, one per line.
Switch(config)# no vrf upgrade-cli multi-af-mode common-policies vrf mgmtVrf
You are about to downgrade to the single-AF VRF syntax commands.
You will lose any IPv6 address configured on interfaces
belonging to downgraded VRFs.
Are you sure ? [yes]:
% ipv6 addresses from all interfaces in VRF mgmtVrf have been removed
Downgrading mgmtVrf from new CLI format to older CLI format, removing any IPv6 addresses on
the interface.
Downgrading the image on your switch to a prior release.
Reconfiguring the IPv6 addresses on fa1.
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.0E and IOS 15.2(5)E
Performing the ISSU Process
End with CNTL/Z.
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