From: Jared Scrivener (jscrivener@ipexpert.com)
Date: Wed Jan 28 2009 - 15:35:31 ARST
Hey ftt,
Presuming that your route-map is matching the same prefix-list you'd
effectively achieve the same result.
BGP gives us four ways to filter routes from neighbors using the neighbor
command: Route-maps, AS-Path Filter-lists, Prefix-lists and distribute
lists. If more than one of these are applied simultaneously to a given
neighbor they are processed in that order inbound (and in the reverse order
outbound).
Other than the order of operations if multiple options are applied at the
same time, there is nothing else you really need to consider.
Personally, I generally prefer to use route-maps as they can apply all of
the other types of filtering methods and hence if you need to apply another
method later if you use the same route-map it makes your code a bit simpler
to understand.
Cheers,
Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
Mailto: jscrivener@ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of ftt
Sent: Wednesday, 28 January 2009 12:24 PM
To: ccielab@groupstudy.com
Subject: IEWB Lab6 Vol 2 - Task 4.3
In BGP is there any difference or benefit of using either one of these two
solutions when filtering out prefix from a bgp neighbor?
1) neighbor 1.1.1.1 prefix-list in
OR
2) neighbor 1.1.1.1 route-map in
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