[c-nsp] BGP Route Reflectors

[Mikael Abrahamsson]

On Tue, 11 Jul 2006, Alex Foster wrote:

May I point you to the publication "ISP Essentials" by Cisco.

www.ccxx.net/books/Cisco%20ISP%20Essentials.pdf

It will cover this topic as well. Afaik it's not updated anymore but you 
have to buy the physical book to get the latest revisions, but the ones on 
the web cover all the basics.

> Okay, so separating the physical topology - provided I'm running IGP - I can create iBGP peering between the loopbacks of routers that are not directly connected ??  Throughout any diagrams I looked at I always assumed that a full-mesh iBGP network inferred that a physical connection existed between each and every router (now that I consider that statement - it would seem ludicrous to expect that).
>
> So in my scenario we don't need RRs just iBGP full-mesh as such:
>
> Router A - iBGP to Loopback of Routers B,C,D
> Router B - iBGP to Loopback of Routers A,C,D
> Router C - iBGP to Loopback of Routers A,B,D
> Router D - iBGP to Loopback of Routers A,B,C
>
> Hopefully its as simple as that.

Remember that the BGP sessions should be loopback to loopback 
(update-source in cisco).

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se