RE: BGP filtering - IE lab2 V3

From: Gustavo Novais (gustavo.novais@novabase.pt)
Date: Fri Mar 24 2006 - 07:47:40 GMT-3


Hi,

The wording of the question is different from the one you've stated:

AS400 will not provide transit for TRAFFIC COMING FROM AS54 and its customers
THAT IS DESTINED for AS254.

You have to think of this in a reverse fashion. We are talking about traffic,
not prefixes! Traffic follows the opposite way of the prefixes.

So this means that the prefixes advertised by AS254 will not get forwarded by
AS400 to AS54 and customers. You have several ways of performing this...

Imagine, if I'm on AS54 and I wish to reach AS254, I need to have a prefix
advertised to my routing table by AS400. Only after knowing my destination I
can send traffic to it.

HTH

Gustavo Novais

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Matus
Sent: quinta-feira, 23 de Margo de 2006 23:19
To: ccielab@groupstudy.com
Subject: BGP filtering - IE lab2 V3

ok i don't like the wording of this task at all.

as400 should not advertise prefixes learned from as54 and connected

customers to AS254. however, if you have to configure filtering of the

AS54 prefixes, it will effect as300 and as100 as well., and i don't like

this. this task must be worded wrong. can anyone clarify??

Regards,

John D. Matus

Technical Support / PAS

Fujitsu Consulting

626-568-7716

John.Matus@tokiom.com

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