Out of curiosity, from a horsepower/resource standpoint... Say you wanted to limit the number of prefixes in your BGP table because your router can't handle anything above say 400k safely (Cisco 6500 Sup-720)... Say you do inbound prefix filtering, where you filter out anything larger then a /22. So take Cogent for example, they are 310k prefix if you take partial routes, applying that prefix filter might reduce that number to say 190k. Lets say you do this same thing, for 2 more peers on the router.
Everytime there is an update and new data comes in and these ACLs are applied, is there performance hit? Just curious as to how much hardware resource is needed to crunch those ACLs every time.
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