Cedric, I dont think you have a clear understanding on what a confederation is. A confederation is away so split up an AS into smaller AS's and still make them act as one big AS. The reasons to do this could be scalability, aquirint other networks and not wanting to renumber BGP, or to over come the full mesh requirement of BGP without using route reflectors.
Example Lets say R2 , R4 , R5 and R6 are running BGP. R2 and R4 are in AS 24 and peer with each other (iBGP). R5 and R6 are in AS 56 and peer with each other (iBGP). You can make a confederation AS 2456 which is made up of AS 24 and AS56. The (eBGP) connection between AS 24 and AS 56 would be configured as eBGP but would act more like iBGP. If any router R2,R4,R5, or R6 peered with a thrid AS the third AS would think they are peering with AS2456. To answer your question below. Yes if you applied a route-map of something like that to the peer group neighbor PEERGROUP route-map MyMAP it would apply the route-map to .4 , .5 , and .6 Hope this helps Aaron On Sun, Jul 17, 2011 at 6:57 PM, Cedric King <[email protected]> wrote: > Hi all, > > It was not understanding how peer groups worked after labbing things up, my > thought process was that it did the same thing as Confederations for > managing > large Scale BGP in the sense of applying changes or adding policies to the > one > peer and things trickled down to the group... > > > ex... > > R1 > router bgp 1 > neighbor PEERGROUP peer-group > neighbor PEERGROUP remote-as 1 > neighbor PEERGROUP upd lo0 > > neighbor 200.0.0.4 peer-group PEERGROUP > neighbor 200.0.0.5 peer-group PEERGROUP > neighbor 200.0.0.6 peer-group PEERGROUP > > now if I apply a filter, will it not trickle down to the rest of the group > the > same way if I'm adding this to a Confederation ? > > > > > > ________________________________ > From: Matt Hill <[email protected]> > To: "Di Bias, Steve" <[email protected]> > Cc: Cedric King <[email protected]>; "[email protected]" > <[email protected]> > Sent: Sun, July 17, 2011 5:40:28 PM > Subject: Re: [OSL | CCIE_RS] Peer Group vs Confederation > > I think he is thinking of route reflectors not peer-groups. Although > you could use a peer-group to establish and define all the > route-reflector-clients. > > Cheers, > Matt > > CCIE #22386 > CCSI #31207 > > On 18 July 2011 00:51, Di Bias, Steve <[email protected]> wrote: > > Cedric I'm a little confused by the question my self. If you're looking > at ease > >of configuration confederations aren't the answer, for that you want peer > groups > >or configuration templates. If you need break up your IGP or can't have > full > >mesh then you would use confederations or route reflectors depending upon > what's > >being asked of you > > > > Cedric King <[email protected]> wrote: > > > > > > Hey Gang, > > > > I'm preparing for November... 3rd time is a charm.. I would like to know, > which > > is more convenient for management on in a large scale BGP environment... > > > > Peer Group or Confederation and does one hold more weight over the other > ? > > > > > > v/r > > > > Cedric > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > visit > >www.ipexpert.com > > > > Are you a CCNP or CCIE and looking for a job? Check out > >www.PlatinumPlacement.com <http://www.platinumplacement.com/> > > > > > > UHS Confidentiality Notice: This e-mail message, including any > attachments, is > >for the sole use of the intended recipient (s) and may contain > confidential and > >privileged information. Any unauthorized review, use, disclosure or > >distribution of this information is prohibited. If this was sent to you > in > >error, please notify the sender by reply e-mail and destroy all copies of > the > >original message. > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > visit > >www.ipexpert.com > > > > Are you a CCNP or CCIE and looking for a job? Check out > >www.PlatinumPlacement.com <http://www.platinumplacement.com/> > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com <http://www.platinumplacement.com/> > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
