From: Kevin Baumgartner (kbaumgar@xxxxxxxxx)
Date: Sat Feb 03 2001 - 22:03:06 GMT-3
So I don't know what the topology is that you are using but
if it looks like this
BGP Spoke BGP Spoke
\ /
\ /
\ /
\ /
\ /
\ /
BGP HUB
The recommend way is to do "no sync" with Route Reflectors.
The issue is that the next HOP address for OSPF and BGP will be
different from each of the BGP Spokes.
So looking from BGP spoke on the top right. The BGP routes coming
from left BGP spoke will have a next-hop address of itself not the
BGP HUB. The OSPF route for these routes will have a next hop of
BGP HUB.
Hence no sync between BGP and OSPF.
Kevin
>
> I am having problams with BGP Route Reflection. R3, my RR, is not reflecting
> routes to clients or between clients. All neighbors are Established. Here is
> the config for R3's BGP.
>
> router bgp 1
> bgp router-id 138.1.3.3
> network 138.1.0.0
> neighbor 138.1.1.1 remote-as 1
> neighbor 138.1.1.1 update-source Loopback0
> neighbor 138.1.1.1 route-reflector-client
> neighbor 138.1.4.4 remote-as 1
> neighbor 138.1.4.4 update-source Loopback0
> neighbor 138.1.4.4 route-reflector-client
> neighbor 138.1.5.5 remote-as 1
> neighbor 138.1.5.5 update-source Loopback0
> neighbor 138.1.5.5 route-reflector-client
> neighbor 150.10.9.2 remote-as 6
>
> 138.1.1.1 - R1
> 138.1.4.4 - R4
> 138.1.5.5 - R5
> 150.10.9.2 - R6
>
> R3 has all routes as shown.
>
> R3#sh ip bgp
> BGP table version is 3, local router ID is 138.1.3.3
> 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
> *> 138.1.0.0 0.0.0.0 0 32768 i
> * i 138.1.5.5 0 100 0 i
> * i 138.1.4.4 0 100 0 i
> * i 138.1.1.1 0 100 0 i
> * i140.10.0.0 138.1.1.1 0 100 0 i
> *> 150.10.0.0 150.10.9.2 0 0 6 i
> * i160.10.0.0 160.10.9.6 0 100 0 2 i
>
> 140.10.0.0 is being advertised by R1, 150.10.0.0 is being advertised by R6,
> and 160.10.0.0 is being received by R5. R5 originally receivd the routed
> from R2 vie EBGP.
>
> R1 has IP BGP = 138.1.0.0, 140.10.0.0, and 150.10.0.0
> R4 has IP BGP = 138.1.0.0, and 150.10.0.0
> R5 has IP BGP = 138.1.0.0, 150.10.0.0, and 160.10.0.0
> R6 has IP BGP = 138.1.0.0, and 150.10.0.0
> R2 has IP BGP = 138.1.0.0, and 160.10.0.0
>
> Can anyone help me discover why the routes won't "sychronize"? I am not
> using any route-maps or special commands. This is only a basic config. R5,
> R1, R3, and R4 are all part of AS 1 and use OSPF as the IGP. All routes in
> the OSPF domain are sychronized. Please help...
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:28:35 GMT-3