My company is planning to do full BGP with two providers with which we are now using default routing for the out packets mixed with BGP for announcing our prefix. My concern is that I'm uncapable to determine the correct machine to do it. I presume that anything less than a 7600 or 6500 is unuseful, but even with that gear, I'm not sure if it's better a 6500 or a 7600. I can't get the differences between them for us. Worse, which supervisor is the minimum for support the 250000+ BGP routes? 32, 720 (which incarnation?)? I'm lost :O
By the way, we're a hosting company and all of our connections are FastEthernet or GigaEthernet (with providers and the other switches)
Don't bother with the 2800 or 3800. I'd go with a 7200 series. Either the new 7201 which is a sweet little box http://www.cisco.com/en/US/products/ps7253/index.html
or a 7204/7206 VXR bundle. You'll want the NPE-G2 with 1Gig ram. The Sup720-3BXL will work, but as stated in a previous post, it's way too much hardware just to hold the BGP table.