BGP AS-Path access list

From: Sami (sy1977@gmail.com)
Date: Wed Jun 21 2006 - 12:40:06 ART


Group,

One of task say configure AS200 so that it will only send out traffic from
this link to AS100 and it's directly connected customer.
I configured as-path access list as below but still R2 is receiving routes
from other than 100 and 54. what could be the problem ?

*R2#show ip as-path-access-list
AS path access list 58
    permit ^100(_[0-9]+)?$
*
R2#show running-config | section bgp
router bgp 200
 no synchronization
 bgp router-id 150.1.2.2
 bgp log-neighbor-changes
 network 129.1.3.0 mask 255.255.255.128
 network 129.1.3.128 mask 255.255.255.128
 network 129.1.17.0 mask 255.255.255.0
 aggregate-address 129.1.0.0 255.255.0.0
 neighbor 129.1.23.3 remote-as 200
 neighbor 129.1.23.3 next-hop-self
 neighbor 129.1.23.3 route-map R4 out
 neighbor 129.1.124.4 remote-as 100
 neighbor 129.1.124.4 route-map default in
 neighbor 129.1.124.4 route-map R4 out
 *neighbor 129.1.124.4 filter-list 58 in
* neighbor 192.10.1.254 remote-as 254
 neighbor 192.10.1.254 password CISCO
 no auto-summary

R2#show ip bgp
BGP table version is 39, local router ID is 150.1.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
*>i0.0.0.0 129.1.17.7 0 500 0 100 i
* 129.1.124.4 0 200 0 100 i
*> 28.119.16.0/24 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
*> 28.119.17.0/24 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
**>i112.0.0.0 129.1.124.4 0 100 0 100 54 50 60 i
*>i113.0.0.0 129.1.124.4 0 100 0 100 54 50 60 i
**> 114.0.0.0 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
*> 115.0.0.0 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
*> 116.0.0.0 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
*> 117.0.0.0 129.1.124.4 0 100 54 i
* i 129.1.124.4 0 100 0 100 54 i
*> 118.0.0.0 129.1.124.4 0 100 54 i

Thanks



This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:33 ART