From: Andy Fang (ccie5626@xxxxxxxxx)
Date: Thu Jun 27 2002 - 18:30:15 GMT-3
Backdoor net admin distance = 200
EBGP net admin distance = 20
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprrp_
r/bgp_r/1rfbgp2.htm#xtocid15
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Annu
Roopa
Sent: Thursday, June 27, 2002 4:23 PM
To: Cisco@groupstudy.com; ccielab@groupstudy.com
Subject: BGP Question
Group,
Here is a BGP scenario whic is troubling me. what am i
doing wrong ? The scenario is about BGP backdoor and
it looks like this.
eBGP eBGP
172.16.1.0 10.1.1.0
R2-------------R10---------------r12--175.10.10.1
| |
|---------------------------------
192.168.1.0 IGRP
The configs look as below. even thought i configure
BGP backdoor the path taken is thru the EBGP link ?
hostname R12
ip address 175.10.10.1 255.255.0.0
!
interface Serial0
ip address 10.1.1.2 255.255.255.0
no fair-queue
!
interface Serial1
ip address 192.168.1.2 255.255.255.0
!
router igrp 100
network 175.10.0.0
network 192.168.1.0
!
router bgp 300
bgp router-id 175.10.10.1
bgp log-neighbor-changes
network 10.1.1.0 mask 255.255.255.0
network 175.10.0.0
neighbor 10.1.1.1 remote-as 200
no auto-summary
------
hostname R2
interface Loopback0
ip address 190.10.10.1 255.255.255.0
!
interface Serial0
ip address 172.16.1.1 255.255.255.0
!
interface Serial1
ip address 192.168.1.1 255.255.255.0
clockrate 64000
!
router igrp 100
network 192.168.1.0
!
router bgp 400
bgp log-neighbor-changes
network 175.10.0.0 backdoor
network 190.10.10.0 mask 255.255.255.0
network 190.10.10.0
network 192.168.1.0
neighbor 172.16.1.2 remote-as 200
------
R2#show ip route
C 190.10.10.0 is directly connected, Loopback0
B 175.10.0.0/16 [20/0] via 172.16.1.2, 00:05:45
C 192.168.1.0/24 is directly connected, Serial1
B 200.10.10.0/24 [20/0] via 172.16.1.2, 00:00:43
180.10.0.0/24 is subnetted, 1 subnets
B 180.10.10.0 [20/0] via 172.16.1.2, 00:05:46
R2#show ip bgp
BGP table version is 120, local router ID is
190.10.10.1
Status codes: s suppressed, d damped, h history, *
valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf
Weight Path
*> 175.10.0.0 172.16.1.2 0 200 300 i
*> 180.10.10.0/24 172.16.1.0 0 200 i
*> 190.10.10.0/24 0.0.0.0 0
32768 i
*> 192.168.1.0 0.0.0.0 0
32768 i
Thanks in advance.
This archive was generated by hypermail 2.1.4 : Tue Jul 02 2002 - 08:12:42 GMT-3