RE: BGP question

From: Daniel Cisco Group Study (danielcgs@imc.net.au)
Date: Thu Apr 17 2003 - 07:35:36 GMT-3

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Absolutely correct.... my stuff up.....

Daniel

-----Original Message-----
From: OhioHondo [mailto:ohiohondo@columbus.rr.com]
Sent: Wednesday, 16 April 2003 21:44
To: Daniel Cisco Group Study; Jason Wydra; Danny Andaluz;
ccielab@groupstudy.com
Subject: RE: BGP question

I would change that a bit. The RR will reflect the routes to the RR-clients
and to any external BGP router (in another AS or sub-AS) that it has a BGP
session with.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Daniel Cisco Group Study
Sent: Wednesday, April 16, 2003 1:44 AM
To: Jason Wydra; Danny Andaluz; ccielab@groupstudy.com
Subject: RE: BGP question

No.... The RR will still reflect the non-RR-Client's routes, but ONLY to the
RR Clients. The RR will not reflect those routes to other IBGP or EBGP
peers.

Daniel

-----Original Message-----
From: Jason Wydra [mailto:jasonwydra@yahoo.com]
Sent: Wednesday, 16 April 2003 14:07
To: Daniel Cisco Group Study; Danny Andaluz; ccielab@groupstudy.com
Subject: RE: BGP question

So then the only difference is that a non-RR-client will not have it's
routes
reflected by the RR while the RR-clients will reflect to all types?

Daniel Cisco Group Study <danielcgs@imc.net.au> wrote:

Danny,

Your assumption about what a RR client is, is correct.

If the RR did not reflect to IBGP Non-Clients, how would they know about the
routes coming from RR Clients? The only way would be to peer the RR Clients
with the IBGP Non-Clients, which would defeat the purpose of RRs. Therefore
the RR needs to reflect routes from RR clients to IBGP non-clients.

Hope this helps.

Daniel

-----Original Message-----
From: Danny Andaluz [mailto:dannyandaluz@comcast.net]
Sent: Saturday, 12 April 2003 06:05
To: ccielab@groupstudy.com
Subject: BGP question

I have a question about non-clients in a route-reflector topology. Assuming
all routers are in the same AS, you have a hub and spoke topology where the
RR
has three peerings with three different routers. Only two of those neighbors
are configured as route-reflector-clients. In Doyle's routing TCPIP V. 2 pg.
127, it says that if a RR learns a route from a RR-client that route will be
sent to the other RR-client as well as the non-client. I am under the
impression that a non-client is simply a neighbor that is not configured as
a
RR-client in the RR. If this non-client was in a different AS, I can see
this
happening because that is EBGP, but IBGP assumes a full mesh, so how could
the
RR send this route to the non-client? Of course, I'm going on the assumption
that a non-client is what I described previously. So I guess my question
really is, what is a non-client?
TIA,
Danny

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