Can I upgrade my Catalyst switches from CatOS to IOS? Is there somewhere I can find out?
It depends on what supervisor you have , it must be at least a Sup II Plus to have ios . If it is only a sup II you cannot change it . If it is a Sup II plus it would have come with IOS . My guess is you have a 4500 chassis with a Sup II in which case you cannot upgrade it . You can do a show mod and post here and we can tell you .