On Monday 16 June 2008, Vira W wrote: > My first problem is in IGP configuration inside AS 100. > I'm using OSPF. I still confused how to make non-BGP > router (C,E,B,D) understand how route the packet > transitting this AS.
Well, if the routers can't talk BGP, then, as others have mentioned, some of your options are tunnels or label switching (MPLS). > Second, I understand that iBGP inside AS 100 needs to be > configured in mesh topology. Right - part of the BGP spec. > Otherwise, use route > reflector or confederation. I wouldn't recommend confederations - personally, I think they are complex and unnecessary (unless you've inherited a legacy setup). Route reflectors are the way to go. > But, if I use route > reflector, I'm confused because the each route reflector > itself must be meshed, in the other side, from the > physical topology (as in the picture), there is none > router that is connected mesh. Since you have an IGP running within AS100, IP reachability between the route reflectors will be available, and they can mesh. > So, which router should I > choose as RR. The only other routers, you say, that can do BGP are A, F, G and H. You could choose any two (I'm unsure about the actual dynamics of your network to make a decision for you), and they should work, because OSPF will figure out how to "connect" them. > Then, if I choose BGP confederation,... Step away from the confederation :-). Hope this helps. Cheers, Mark.
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