The only Catalyst 4000 that can have dual Supervisors is the Catalyst 4507R.
If it is a new purchase, take a Catalyst 4500. The big advantage is that it has higher output power supplies which allow Inline power to be supplied without an external Power Entry Module - as previously required on the Catalyst 4000.
Catalyst 3550 is more intended for workgroups and is priced accordingly. Depends on the business requirement as to which is the best solution.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...