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Re: On the subject of multihoming

  • From: kb3ien+nanog
  • Date: Fri Nov 07 00:03:27 2008


Yes bgp multihop is a GREAT* way to figure out if a cablemodem** is even /really/ online.


Alas, I've not see much on the traffic engineering side either.


* Read "the only way i've found to do this with cisco's ios"


** or any other pipe for that matter.

On Tue, 4 Nov 2008, Charles Wyble wrote:

Date: Tue, 04 Nov 2008 12:32:11 -0800
From: Charles Wyble <[email protected]>
To: NANOG list <[email protected]>
Subject: On the subject of multihoming

I'm working on a small experiment which utilizes multiple outbound links (in the experiments case multiple consumer 3G connections [to 2 Sprint/2 Verizon/1 AT&T], Time Warner Cable Modem and an SBC Global DSL connection.

What is the best way to do outbound traffic engineering? I would like to be able to determine the best path possible and send traffic out the appropriate link.

Could this be done with a copy of the BGP tables?

Obviously as they are consumer connections, I wouldn't get a BGP feed so would need to download a copy, which has the risk of stale data. Perhaps some sort of multihop BGP setup?

I have done some research and found a lot of references to small site multihoming without BGP for link redundancy but not for traffic engineering.


Thanks.


Charles