From: Jim Brown (Jim.Brown@xxxxxxxxxxxxx)
Date: Tue May 01 2001 - 11:18:31 GMT-3
Chris,
This is from memory.... One of the requirements is to match the route tables
listed in the lab and look at task 2 question 5.
The question states, "The only BGP AS paths R1 should see is 10 and 30. The
only BGP AS paths R2 should see is 10 and 20".
The two routers in AS 20 and AS 30 are devoid of the double paths to each of
the sub AS, one route through R5 and the other through R3. There is only one
path to each route, the shortest path. Without the filter both routers (R3
and R5) would advertise a path to their subAS's routes in addition to their
own originated routes.
The filter statement basically is saying "only advertise routes that
originate in my subAS, don't advertise routes learned from my peer subAS".
-----Original Message-----
From: Chris Mott [mailto:cmott@home.com]
Sent: Monday, April 30, 2001 10:59 PM
To: CCIE
Subject: Lab 12
Can anyone answer me why the solution to this lab has filter-lists on R3 and
R5? As well, why a peer-group on R7 when each router in that AS (R4 and R5)
is fully meshed with the others? My understanding of peer-groups was to
push common parameters to the rest of the peers ... also, do anyone notice
that the instructions stated that R5 could not be neighbored with R2, but
the answer does so? ... mine works without it and the filter-lists (I
think!, but I gotta sleep so I'll recheck tomorrow) ... any assistance here
would be greatly appreciated! help a poor doof about to succumb to the
ritual whipping!
6 daze to San Jose ;-]
Chris Mott
CCDP, CCNP+Voice
AVVID, Security, Network Management
Solarcom, www.solarcom.net
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