4500 software upgrade

Hello

Today I’m performing yet another upgrade on a 4500 6L-e switch (to 15.2.2E8) and i’d like to recommend an excellent video going thru all the steps on a 4500 with one supervisor and then with two supervisors (not much difference here other than: redundancy reload shelf to reload both sups simultaneously rather than one).

https://supportforums.cisco.com/t5/network-infrastructure-videos/catalyst-4500-ios-upgrade-steps-single-dual-supervisors/ba-p/3103378

One caveat is that you cannot have slashes in the boot system command. This is the only way you should do it:

boot system bootflash:cat4500e-lanbasek9-mz.152-2.E8.bin

wr

If you use slashes, the supervisor will go to ROMMON and you will need to call an onsite person to help you. A boatload of fun.