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Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
OL-30933-01
Chapter 5 Configuring Virtual Switching Systems
In-Service Software Upgrade (ISSU) on a VSS
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Switch# dir bootflash:
Directory of bootflash:/
29122 -rw- 119519232 Aug 13 2012 19:13:14 +00:00
cat4500e-universal.SSA.03.03.00.SGN1.34.151-2.SGN1.34.bin
29125 -rw- 119286584 Aug 13 2012 22:30:02 +00:00
cat4500e-universal.SSA.03.03.00.SGN1.33.151-2.SGN1.33.bin
820875264 bytes total (581648384 bytes free)
Switch# dir slavebootflash:
Directory of slavebootflash:/
58372 -rw- 119519232 Aug 14 2012 11:40:47 +00:00
cat4500e-universal.SSA.03.03.00.SGN1.34.151-2.SGN1.34.bin
58370 -rw- 119286584 Aug 14 2012 11:25:38 +00:00
cat4500e-universal.SSA.03.03.00.SGN1.33.151-2.SGN1.33.bin
822910976 bytes total (583688192 bytes free)
Switch# issu changeversion
bootflash:cat4500e-universal.SSA.03.03.00.SGN1.34.151-2.SGN1.34.bin
%% 'issu changeversion' is now executing 'issu loadversion'
% issu loadversion executed successfully, Standby is being reloaded
%% changeversion finished executing loadversion, waiting for standby to reload and reach
SSO ...
Switch 2 goes down, reboots with the post-upgrade image, then reaches SSO Hot Standby state.
...
*Aug 14 15:45:45.931: %RF-5-RF_TERMINAL_STATE: Terminal state reached for (SSO)
*Aug 14 15:48:45.958: %INSTALLER-7-ISSU_OP_SUCC: issu changeversion is now executing
'issu runversion'Please stand by while rebooting the system...
A Stateful Switchover occurs. Switch 2 takes over as the Active switch. Switch 1 goes down, then
reboots (still with the pre-upgrade image) and reaches SSO Hot Standby state.
(From this point on, the console logs are gathered on Switch 2)
*Aug 14 15:54:49.164: %INSTALLER-7-ISSU_OP_SUCC: issu changeversion is now executing
'issu commitversion'
Switch 1 goes down again, then boots up (this time with the post-upgrade image), and comes up as SSO
Hot Standby
Switch# show switch virtual
Switch mode : Virtual Switch
Virtual switch domain number : 16
Local switch number : 2
Local switch operational role: Virtual Switch Active
Peer switch number : 1
Peer switch operational role : Virtual Switch Standby
Switch# show switch virtual slot-map
Virtual Slot to Remote Switch/Physical Slot Mapping Table:
Virtual Remote Physical Module
Slot No Switch No Slot No Uptime
---------+-----------+----------+----------
1 1 1 00:01:21
2 1 2 00:19:12
3 1 3 00:19:12