From: CCIE GOAL (ccie.goal@gmail.com)
Date: Wed Jun 06 2007 - 12:41:54 ART
Hi guys,
I ran into a problem with BGP, maybe it's simple to resolve but I got stuck
on it.
People say that sometimes it is easier to spot the issue from outside the
picture...
Scenario:
[ BGP AS 1 ] -- (OSPF/not in bgp) -- [ BGP AS 2 ] -- [ BGP AS 3 ]
- AS 1 is peering to AS 2
- AS 2 is peering to AS 3
- Between AS 1 and AS 2; there is some devices in OSPF domain only (Not
BGP).
- AS 3 is announcing some prefixes, let's say 10.10.X.0/24...
These prefixes are pingable from AS 2 but not from AS 3 even the BGP table
from AS 3 has these prefix as valid.
The issue is that the OSPF domain do not know how to reach the prefixes
10.10.X.0/24.
I am not allowed to use static routes anywhere...
I have tried to redistribute BGP 2 into OSPF but no success, it seems that
eBGP learned prefixes are not redistributed...
Can somebody help me on this?
Follow the configs:
---------------------------------------------------
AS1#
router bgp 1
no synchronization
neighbor 2.2.2.2 remote-as 2
no auto-summary
!
router ospf 1
network 10.10.1.1 0.0.0.0 area 1
---------------------------------------------------
OSPF#
router ospf 1
network 10.10.1.2 0.0.0.0 area 1
network 10.10.2.2 0.0.0.0 area 0
---------------------------------------------------
AS2#
router bgp 2
no synchronization
neighbor 1.1.1.1 remote-as 1
neighbor 3.3.3.3 remote-as 3
no auto-summary
!
router ospf 1
network 10.10.2.1 0.0.0.0 area 0
---------------------------------------------------
AS3#
router bgp 3
no synchronization
neighbor 2.2.2.2 remote-as 2
no auto-summary
---------------------------------------------------
Thanks in advance,
Luciano
This archive was generated by hypermail 2.1.4 : Sun Jul 01 2007 - 17:24:47 ART