BGP in Confederations and Using Synchronization

From: OhioHondo (ohiohondo@columbus.rr.com)
Date: Mon Apr 14 2003 - 21:58:45 GMT-3


Hello
>
        I thought I'd try resending this because the orginal thread got somewhat
off track. Someone suggested that, when using confederations, each sub-AS
should be its' own IGP domain (i.e. with OSPF, have it's own area 0) Does
everyone else agree with this??

Thge original question was....
I have a question for someone with a grasp on BGP Confederations and how>
synchronization affects it. My scenario
>
> AS301/R7 --- AS501/sub-AS65001/R3 --- AS501/sub-AS65002/R1 --- AS101/R9
> |
> |
> AS501/subAS65001/R2
>
> Routers R1, R2 and R3 are in a single OSPF domain. The BGP router-id's and
> OSPF router-ids are the same on all routers.
>
> My problem --- an advertisement comes in from AS101/R9, let say
49.0.0.0/8.
> That advertisement is propagated via OSPF to router R2 with R1's OSPF
> router-id.
>
> When that advertisement crosses the sub-AS border between R1 and R3, the
BGP
> router-id is changed to that of R3, therefor when the iBGP route gets to
R2,
> the BGP router-id is from R3 while the OSPF router-id is from R1. The
result
> is no sync. Any advice????

Jerry Haverkos
jhaverkos@columbus.rr.com
614-351-8617



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