System requirements to upgrade IOS on WS-C4507R-E (Supervisor V)?

[rodrigma2]

Hello, 

I need to upgrade my WS-C4507R-E (Supervisor V) from IOS 12.2(54)SG1, ROM 12.2(31r)SGA1, to 15.0(2)SG10. The question is, can I do a jump without installing other versions and what are the system requirements? Please help. Thanks. 

[Leo Laohoo]

Read the Release Notes properly.  A big jump like that sometimes requires the bootstrap (aka ROMstrap) to be upgraded first.  

The Release Notes will also give step-by-step instruction(s) about different upgrade scenarios.

[rodrigma2]

I got to the bottom of it, and yes, I will have to upgrade the ROM before I can upgrade the IOS. I was hoping not to do 2 upgrades, but it's all good. Thanks, Leo.