I'm looking into using a CAT3550 as a 'concentrator' in a new hub network. Main criteria is that i need full BGP support since several other connections will end up on that switch and routing will need to go over BGP. Does the CAT3550-EMI support all router IOS BGP commands and in general what's the routing capability of teh CAT3550... possible exmaple configs are also highly appreciated.
It should work fine, with all normal BGP commands avaiable. The biggest limitation you're going to face is in memory. If you're running it as a box within your BGP mesh (not internet routes, or just partials or a default), it should work fine. If you plan on taking in full internet routes, make certain you stack as much memory in it as it will hold. I'd say 256MB is the minimum now-a-days, and 512MB is preferrable.
I work on a rule of thumb of 600 bytes per BGP entry on a typical Cisco router. This must be multiplied by the number of EBGP connections locally on the router, and or x( num EBGP connections+1 )if there is IBGP to other internet connected routers. So assuming you have one EBGP connection, this is 3.6Mbytes, so you are quite safe,
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