[c-nsp] Two mpls provider with the same core AS# workaround

Arie Vayner (avayner) avayner at cisco.com
Mon Sep 20 08:25:53 EDT 2010


Roger,

What kind of services these network run (Inter-AS L3VPN)?
What kind of service does your network provide in the scheme of all
things (are you a transit MPLS provider, the customer etc)?

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Roger Wiklund
Sent: Monday, September 20, 2010 12:37
To: Cisco-nsp
Subject: [c-nsp] Two mpls provider with the same core AS# workaround

Hi.

Scenario: Two MPLS providers, one major with bulk of the sites. one
minor with ~10 sites.
Both providers have the same AS# in the core, and I want to exchange
routes between these providers (via our network, not directly betweent
the providers).

to overcome this, I thinking about some different approaches (on the
minor MPLS provider side/in our own network)

BGP aggregate (in our network)
allow-as in (minor MPLS providers network)
local-as + allow-as in (minor mpls providers network)
remove private as function in IOS 15.1(2)T (can remove private AS even
if you have a mix of public and private AS#)

Anyone with some experience on this and how this best can be solved?

Thanks!
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