From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Sun Jul 17 2005 - 17:27:42 GMT-3
Group -
Here is a probably that I experienced in the lab this afternoon.......
I have 3 routers set up .... 2 are in ibgp 123(Internal & Edge)....and
one in bgp 456 (Provider).......
Setup is like this...... Internal(BGP123) - - - - Edge(BGP123 - - - -
- Provider (BGP456)
Configs are : (non-pertinent information omitted)
PROVIDER:
interface Loopback0
ip address 192.20.11.1 255.255.255.0
!
interface Serial0/0.1 point-to-point
description Provider to Edge
ip address 150.1.0.2 255.255.255.252
frame-relay interface-dlci 100
!
router bgp 456
no synchronization
bgp log-neighbor-changes
network 128.20.12.0 mask 255.255.252.0
neighbor 150.1.0.1 remote-as 123
no auto-summary
!
EDGE:
interface Loopback0
ip address 172.16.0.1 255.255.255.255
!
interface Serial0/0.1 point-to-point
description Edge to Internal-Core
ip address 172.16.1.6 255.255.255.252
frame-relay interface-dlci 101
!
interface Serial0/0.2 point-to-point
description Edge to Provider
ip address 150.1.0.1 255.255.255.252
frame-relay interface-dlci 100
!
router ospf 123
log-adjacency-changes
network 172.16.0.0 0.0.255.255 area 0
default-information originate
!
router bgp 123
bgp log-neighbor-changes
network 197.1.0.0 mask 255.255.0.0
aggregate-address 197.1.0.0 255.255.0.0 summary-only
neighbor PG peer-group
neighbor PG remote-as 123
neighbor PG update-source Loopback0
neighbor PG route-reflector-client
neighbor PG next-hop-self
neighbor 150.1.0.2 remote-as 456
neighbor 172.16.0.3 peer-group PG
neighbor 172.16.0.2 peer-group PG
INTERNAL:
interface Loopback0
ip address 172.16.0.2 255.255.255.255
!
interface Serial0/0.2 point-to-point
description Internal-Core to Edge
ip address 172.16.1.5 255.255.255.252
frame-relay interface-dlci 101
!
interface FastEthernet0/1
no ip address
shutdown
speed auto
half-duplex
!
router ospf 123
log-adjacency-changes
passive-interface Loopback0
network 172.16.0.0 0.0.255.255 area 0
!
router bgp 123
bgp log-neighbor-changes
neighbor 172.16.0.1 remote-as 123
neighbor 172.16.0.1 update-source Loopback0
no auto-summary
!
The bgp database appears correct on all routers. And, I can ping the
loopback interface on the "provider router" (192.20.11.1) from the Edge
router, but for some reason....i cannot ping it from the Internal
router. I have racked my brains trying every which way to get to it.
Yet, I can see it in the bgp table of the internal router with the next
hop as being the edge router. The ibgp and ebgp appears to be in order,
but something is definitely missing. Any ideas?
Dave Schulz
Email: dschulz@dpsciences.com <mailto:dschulz@dpsciences.com >
This archive was generated by hypermail 2.1.4 : Sun Sep 04 2005 - 17:00:30 GMT-3