From: ccie@dg4acr.org
Date: Tue Aug 05 2003 - 16:10:01 GMT-3
hi,
have you thought about neighbor x.x.x.x ebgp-multihop 2 ?
ciao
knut
Jay Hennigan <jay@west.net> schrieb am 05.08.2003, 20:56:08:
> On Tue, 5 Aug 2003, ccie2be wrote:
>
> > Hi,
> >
> > BGP wouldn't form peers between 2 spokes on a F/R hub and spoke topology.
> >
> > Here are the details:
> >
> > R3---------R2----------R1
> > spoke hub spoke
> >
> >
> > All routers are running OSPF and the F/R is in subnet 172.16.100.0/24 and the
> > f/r interfaces were all left at their default ospf network types -
> > non-broadcast. The neighbor command was configured on R2 to allow it to form
> > ospf adjacencies with R1 and R3. R1 can ping R2 but not R3 and R3 can ping R2
> > but not R1.
> >
> > R1's loopback interface = 192.168.1.1 and R2's loopback = 192.168.2.2 and R3's
> > loopback = 192.168.3.3
> >
> > The route table of each router shows all 3 loopbacks.
>
> Can you ping and/or telnet to the appropriate loopback from each of the
> neighbor routers?
>
> > R1 and R3 can both peer with R2 but they don't peer with each other. I
> > thought that as long as there was a TCP path ( the ip addr was in the route
> > table), R3 and R1 could peer. But this isn't working. Can someone explain
> > why not?
>
> Generally true. "In the route table" != "There is a TCP path", however.
>
> Policy routing, ACLs, and a plethora of other things can result in an
> address being in the route table yet unreachable. Don't despair. You
> now have a great opportunity to practice your skill with detailed show
> and debug commands!
>
> --
> Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net
> WestNet: Connecting you to the planet. 805 884-6323 WB6RDV
> NetLojix Communications, Inc. - http://www.netlojix.com/
>
>
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