From: Lachlan Kidd (lkidd@xxxxxxxxxxxxxxxxxxx)
Date: Thu Feb 01 2001 - 20:24:23 GMT-3
Hi Mike,
How about (and this is only a theory...) only advertising only your net
work
out, and using a default route to get out of your AS (i.e. don't take any
external routes in). If you're dual homed, you would need to filter in such
a way so that only your network makes it into the nieghbors table and not
other AS's routes.
This diagram may help
AS1 AS2 AS3
---R1-------R2----R3-----
Basically if R2 only allows it's own networks to reach R1 and R3 then no-one
else will want to use R2 to get to AS3 (and beyond).
Summary:
Deny routes learned from neighbor R3 going to neighbor R1 and vice versa.
I think that's right.
Regards,
Lachlan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Mike S. Lee
Sent: Friday, 2 February 2001 7:01:AM
To: ccielab@groupstudy.com
Subject: Non-transient AS's in BGP
Can any one please explain how to make an AS non-transient. I can do this
with an AS-Path ( ^$) but how would this be accomplished without using an
AS-Path filter. I have exhausted Halabi and just need to be pushed in the
right direction. Thanks for any help you can provide.
Mike Lee
CCNP+LATM+Security+Voice Access/CCDP
NNCSE/NNCDE
Cisco Systems, Inc.
12515 Research Blvd., Bldg. 04
Austin, TX 78759-2200
DSL Customer Support Engineering
mikele@cisco.com
(512)378-1331 ofc
Text Page: mikele@epage.cisco.com
Mike Lee
CCNP+LATM+Security+Voice Access/CCDP
NNCSE/NNCDE
Cisco Systems, Inc.
12515 Research Blvd., Bldg. 04
Austin, TX 78759-2200
DSL Customer Support Engineering
mikele@cisco.com
(512)378-1331 ofc
Text Page: mikele@epage.cisco.com
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