[c-nsp] Removing transit AS from path

[Boštjan Fele]

One possible solution could be Carrier Supporting Carrier (CSC). But in this scenario carrier (you) and subscribers exchange traffic with MPLS.

Regards,
Bostjan 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Gaspar Peter
Sent: Monday, July 24, 2006 11:18 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Removing transit AS from path

Hello,

We would like to connect two ISPs using MPLS Backbone but we have following requirements:

1. Both ISPs use private AS numbers
2. Our MPLS backbone has also a private AS 3. The actual requirement is, that the AS number of the interconnecting MPLS Backbone is not included in the AS-Path visible on the routers of both ISPs

The ISPs do not use MPLS, they only need native IP connectivity, eBGP should be used to exchange routes.

Does anyone of you guys already implemented similar architecture? What are the possibilities?

One solution that pops into my mind would be to implement GRE Tunnels between the ISP routers, but it is not very scalable.

Could "local-as no-prepend" feature help if I implement it on my MPLS PE routers like this:
!
router bgp 65500
neighbor 192.168.1.1 remote-as 65501
neighbor 192.168.1.1 local-as 65500 no-prepend !  

Thanks,
Peter

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