From: ccie2be (ccie2be@nyc.rr.com)
Date: Mon Apr 14 2003 - 16:54:18 GMT-3
Hi,
The way I understand it, each sub -AS s/b a different IGP domain, so you
shouldn't have OSPF or any other IGP advertising routes outside the sub-As -
that's the job of BGP. So, it looks like in your case, where you have R3
and R2 in the same OSPF domain, you have a config which wouldn't work. Jim
----- Original Message -----
From: "OhioHondo" <ohiohondo@columbus.rr.com>
To: <ccielab@groupstudy.com>
Sent: Monday, April 14, 2003 10:26 AM
Subject: BGP Confederation and Synchronization
> Hello
>
> 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????
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