Re: BGP Filtering

From: ying-chuan.c.chang@xxxxxxxxxxx
Date: Fri Nov 09 2001 - 10:19:41 GMT-3


   
Hi,

This is what said in Cisco ISP Essentials (V2.9 6/06/2001), page 126:

For inbound prefix announcements, the route-map is applied first, followed
by the filter-list, finally by the prefix-list (or distribute-list -
remember that prefix-list and distribute-list are mutually exclusive). For
outbound prefix announcements, the order is reversed, with prefix-lists
implemented first, followed by filter-lists, finally by the route-map.

Hope this help.

Chang

"Lupi, Guy" <Guy.Lupi@eurekaggn.com>@groupstudy.com on 11/08/2001 07:04:08
PM

Please respond to "Lupi, Guy" <Guy.Lupi@eurekaggn.com>

Sent by: nobody@groupstudy.com

To: "'ccielab@groupstudy.com'" <ccielab@groupstudy.com>
cc:
Subject: BGP Filtering

Can anyone tell me the order of precedence that a router will use when
multiple filters are defined? For example, if I had the following:

neighbor x.x.x.x prefix-list Internet out
neighbor x.x.x.x route-map Sprint out

Assuming that the route map also filtered based on a prefix list, which one
will be executed first?



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