IOS Upgrade from Modular to Non-Modular

Note to self (not yet personally tested):

When upgrading Catalyst 6500 12.2SXI IOS from modular to non-modular in dual-supervisor configuration you cannot do any kind of switchover between the supervisors. You need to reload the whole switch.

Source: CSCsb07831 (Cisco login required)

Apparently the standby supervisor will keep reloading if you try the switchover method, they say.

Feel free to share your experiences on this.

1 Comment

Add a Comment
  1. I can attest 100% that this is true. I got stuck in a bad situation not realizing this on a VSS pair.

    http://showbrain.blogspot.com/2011/08/catalyst-6509-e-vss-software-upgrade.html

Leave a Reply