[127946] in North American Network Operators' Group
"vpn exchange point"
daemon@ATHENA.MIT.EDU (Vitkovsky, Adam)
Wed Jul 21 12:14:22 2010
From: "Vitkovsky, Adam" <avitkovsky@emea.att.com>
To: "nanog@nanog.org" <nanog@nanog.org>
Date: Wed, 21 Jul 2010 18:13:59 +0200
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hello,
Do you know of any "vpn exchange point" implementations please? -I mean som=
ething like IXP but for mpls vpns
Let's say I'm an ISP that bought or merged with many small ISPs each with i=
t's own AS# and would like to start offering mpls vpn services end to end
If there would be just a few autonomous systems involved I could do option-=
C and run a full mesh between the Inter-AS-RRs
Let's also assume there are more Inter-AS-RRs per AS -but still with small =
number of ASes the full mesh is doable
However if there's like dozen or more ASes -peering with all the Inter-AS-=
RRs would be cumbersome
-that's where the vpn exchange point would be appropriate
I believe the exchange-point could work something like option-c
---- Inter-AS-RR-AS1---- Inter-AS-RR-AS2---- Inter-AS-RR-AS3----
-where the AS2 would be represented by a single node -the exchange point
Let's also assume the ASes have separate mpls links enabled between them
Than this exchange point is just about the control plane (no transit traffi=
c -just inter-as-vpn-routes distribution)
It's like adding another layer of RRs to the picture
Let's say there are Intra-AS-RRs -that reflect routes between PE routers wi=
thin a single AS
Let's say there are Inter-AS-RRs -that reflect routes between multiple ASes
(but if there are may ASes and we can't cope with the full mesh anymore)
We can ad Global-RRs --that will reflect routes between Inter-AS-RRs
-these Global-RRs could be thought of as the exchange point=
s
adam
