Make sure the old version is set in bootvar
Re: ISSU loadversion on VSS ? Make sure that the current image is
configured on the switch
boot system flash sup-bootdisk:s72033-ipbase-mz.122-33.SXI2a.bin
look at this post.
https://supportforums.cisco.com/message/606688
issu loadversion 1/5
sup-bootdisk:s72033-adventerprisek9_wan-mz.122-33.SXI4a.bin 2/5
slavesup-bootdisk:s72033-adventerprisek9_wan-mz.122-33.SXI4a.bin
C6506VSS#issu runversion
This command will reload the Active unit. Proceed ?
[confirm]
C6506VSS# issu acceptversion
% Rollback timer stopped. Please issue the commitversion command.
C6506VSS#issu commitversion
Building configuration…
[OK]
%issu commitversion executed successfully
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/issu_efsu.html#wp1042706
issu loadversion
sup-bootdisk:/newsys/s72033/base/s72033-advipservicesk9_wan-vm
2.copy
tftp sup-bootdisk:s72033-advipservicesk9-mz.122-33.SXI2a.bin
copy tftp slavesup-bootdisk:s72033-advipservicesk9-mz.122-33.SXI2a.bin
3.show version | inc image
show bootvar
show redundancy
show issu state detail
4. issu loadversion sup-bootdisk:s72033-advipservicesk9-mz.122-33.SXI2a.bin
5. show issu outage slot all
6 issu-runversion
7. issu acceptversion
8. issu commitversion
9. show redundancy
show issu state detail
At the end
redundancy force-switchover
to get on the right switch