BGP inbound/outbound filter preference

Hi Guys,

I'm a bit confused, from what I understand is that for filtering traffic,
BGP will look at filtering in this order:-

Inbound: route-map > filter-list > prefix-list
Outbound: prefix-list > filter-list > route-map

Question is: For example. why bother having both route-map and prefix-list
filtering on the inbound when you can just use a single route-map to filter
in traffic. I've seen this being done on some SP routers, and I'm wondering
if there good explanation as to why they are doing this.

Route-map will filter out community tags and prefix-list will filter out
specific routes, can't we do both on route-maps alone??

Cheers.

Emir

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Received on Tue Nov 02 2010 - 11:45:13 ART