Re: Route Reflection

that command can be used to reduce the amount of iBGP peering.

Look at this example:
http://dans-net.com/no_client_to_client.png

The green lines represent iBGP sessions.

R2 and R3 are RR clients of R1.

A route coming from R4 will be sent to both R2 and R3, and vice-versa.

Because R2 and R3 have iBGP session between them, they do not need the
client to client RR service from R1.

We have saved the need for R2 and R3 to peer to R4.

HTH,
Dan
Troubleshooting blog: http://dans-net.com

On Wed, Dec 2, 2009 at 9:48 PM, jack daniels <jckdaniels12_at_gmail.com> wrote:

> Router(config-router)# *no bgp client-to-client reflection *
>
> Disables client-to-client route reflection
>
>
> what is the use of this command , this says
>
> Disables client-to-client route reflection
> ......so RR acts as normal IBGP router , so its same as not configuring
> router as RR.
>
> On Thu, Dec 3, 2009 at 1:04 AM, Hoogen <hoogen82_at_gmail.com> wrote:
>
> > Hi,
> >
> > +--R3
> > R1--R2--|
> > +--R4
> >
> > Let's say that all these routers are in a single AS.. R1 has some BGP
> > routes
> > and is peering with R2.. Now R2 is a route reflector..It is peering with
> R3
> > and R4. Now R4 and R3 do not have any BGP routes that need to be sent to
> > the
> > other BGP neighbors... Now if the route reflection between clients have
> > been
> > asked to be disabled, do we now have to have peering between R4 and R3? I
> > would assume that since there is no routes that exist on either R3 or R4
> > that needs to get to each other, there is no need of full mesh peering.
> But
> > the general rule is if the reflection is suppressed I need to have a full
> > mesh..
> >
> > Any thoughts on this?
> >
> >
> >
> http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfbgp.html#wp1001965
> >
> > -Hoogen
> >
> >
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Received on Thu Dec 03 2009 - 00:14:23 ART