From: Logan, Harold (loganh@xxxxxxxxxxxx)
Date: Tue Mar 12 2002 - 16:13:38 GMT-3
If the route attached to R2 isn't showing up on R3, the first thing
you'll want to do is compare R3's routing table to its bgp table. If the
route is showing up in R3's BGP table, but not in its routing table,
than R1 is doing its job and reflecting the routes appropriately.
Synchronization is one reason that BGP-learned routes won't show up in
the routing table, but it isn't the only reason. Take a look at the
route in the BGP table... does the next hop IP address match a route in
R3's routing table? If not, you may need to use the 'next-hop-self'
keyword in R1's config.
hth,
Hal
-----Original Message-----
From: kenairs [mailto:kenairs@hotmail.com]
Sent: Tuesday, March 12, 2002 12:16 PM
To: sandyccie@yahoo.com
Cc: ccielab@groupstudy.com
Subject: Re: BGP RR
Hi ,
So in others words, aparting from redistribute into IGP , RR will only
works
if you have turn off syn.
Am i correct ?
Or is there any other way beside redistributing to IGP ?
----- Original Message -----
From: Sandro Ciffali <sandyccie@yahoo.com>
To: kenairs <kenairs@hotmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, March 13, 2002 12:38 AM
Subject: Re: BGP RR
> Since you have sync on, Network advertize by R2 on bgp
> will go into R1's routing table only if it is recd.
> both on BGP and IGP, Only then R1 will advertize that
> network to R3.
> If you turn off the sync on R1 then you will see it
> being advertized to R3.
> Or else redistribute the ethernet on R2 into your
> igrp.
>
> Sandro
> --- kenairs <kenairs@hotmail.com> wrote:
> > Hi ,
> > From the Cisco CD , is states the below
> >
> > When the route reflector receives an advertised
> > route, depending on the
> > neighbor, it does the following:
> >
> >
> > a.. A route from an external BGP speaker is
> > advertised to all clients and
> > nonclient peers.
> >
> >
> > b.. A route from a nonclient peer is advertised to
> > all clients.
> >
> >
> > c.. A route from a client is advertised to all
> > clients and nonclient peers.
> > Hence, the clients need not be fully meshed.
> > Here is my topology,
> >
> > R1
> > | |
> > | |
> > | |
> > R2 R3
> >
> > All routers are able to reach each other through IGP
> > ( eigrp ) . R1 is the RR
> > R2 and R3 is the client.
> >
> > Now, R2 has a E0 . It then have a network command
> > under BGP and is propagrate
> > to R1.
> > But R1 does not advertised the route to R3 ..
> > Why is this so ?
> > All routers are syn enabled.
> >
> >
> > but is R2 received a route from another AS, the
> > route will be advertised to
> > R3.
> >
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