RE: BGP Filter list

From: Brian Best (bbest@xxxxxxxxxxxxx)
Date: Sun Nov 28 1999 - 18:44:13 GMT-3


   
Just as a first step. After you applied your filter did you issue a clear
ip bgp *?

Also, before you applied the filter were your neighbor sessions showing as
ESTABLISHED?

Brian

-----Original Message-----
From: Manjeet Chawla [mailto:mchawla@asanet.com]
Sent: Sunday, November 28, 1999 12:38 PM
To: ccielab@groupstudy.com
Subject: BGP Filter list

Hi all:

Here is the scenario:

          EBGP IBGP EBGP IBGP
R1-----------------R2-------R3------------------R4---------R5

R1 = AS100 Advertises network 10.0.0.0
R2 and R3 = AS200 Advertises 30.0.0.0 and 50.0.0.0
R4 and R5 = AS300 advertises 20.0.0.0 and 40.0.0.0

If I apply a inbound filter-list on R4 as below,

start
!
neighbor <R3's address> filter-list 10 in
!
ip as-path access-list 10 permit .*
!
end

I loose are R2 and R3 originated routes but I still have R1 advertised
route.

I thought .* (dot star) was like DOS's *.*. Why am I not seeing
directly attached AS's routes.

I am using 11.2(12) on a 2500 on R4.

Thanks for your help in advance.

-Manjeet Chawla



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