From: OhioHondo (ohiohondo@columbus.rr.com)
Date: Wed Apr 16 2003 - 10:49:12 GMT-3
RE: BGP questionIf the non-client is in the same AS it works the same. If
the RR receives an update from a "non-RRclient" (in the same AS has been
assumed all along) that it has a BGP session with, the RR will do the
following:
1) propagate that update to all RR-clients to which it has a BGP session
2) propagate that update to all EBGP routers (in external AS's and external
sub-AS's) to which it has a BGP session
It will not propagate that update to other RR's or "non-RRclients" within
its' AS/sub-AS.
-----Original Message-----
From: Danny.Andaluz@triaton-na.com [mailto:Danny.Andaluz@triaton-na.com]
Sent: Wednesday, April 16, 2003 9:35 AM
To: ohiohondo@columbus.rr.com; danielcgs@imc.net.au; jasonwydra@yahoo.com;
dannyandaluz@comcast.net; ccielab@groupstudy.com
Subject: RE: BGP question
That's right, Ohio. But, that's just regular EBGP. But what if the
non-client is in the same AS? That was my original point.
-----Original Message-----
From: OhioHondo [mailto:ohiohondo@columbus.rr.com]
Sent: Wednesday, April 16, 2003 7:44 AM
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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