From: Jeremy Gray (jeremy.gray@xxxxxxxxxx)
Date: Tue Apr 03 2001 - 05:47:56 GMT-3
Absolutely.
Filter-list is for AS path filters - These filters use regexp matches
against the AS-PATHS attributes in BGP announcments
and Distribution-list and prefix-list are for matching the actual IP routes,
as per redistrubution between IGP's.
Filter lists identify the path or paths that you want to permit/deny routes
from. For example using
ip AS-path access-list 10 permit ^$
neighbor 1.1.1.1 filter-list 10 out
Will permit ^$ (null) which are the routes that have no path - or to put it
another way these are the ones that you have injected into BGP with
redistribution or network statements. NOTE: The AS path attribute gets
appended with your AS number as you announce the route to a different AS, so
each route announcement shows the path from where the route came.
Distribution lists identify the IP address ranges you want to accept/deny.
Hope this helps.
Jeremy.
Helping ISP's manage their peering www.netconfigs.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Ola Aiyegbusi
Sent: 03 April 2001 05:46
To: ccielab@groupstudy.com
Subject: Filter-list vs. Distribute-list
I'm configuring BGP and would like to know if there are any major
differences
between the "neighbor x.x.x.x distribute-list" and the "neighbor x.x.x.x
filter-list" command.
Thanks
Ola Aiyegbusi
Sr. Network Design Engineer CCDP, CCNP (Voice Access Specialization)
Sr. Network Engineering Instructor
"Focus and Motivation"
ComPath Inc.
10201 Lee Hwy Suite 140 Fairfax VA 22030
Phone: 703-383-9550 Ext. 122
Pager: 1-888-857-5620
Cell: 703-395-8808
Fax: 703-383-1369
Email: ola@compath.com
Web: http://www.compath.com
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