On the subject of multihoming

kb3ien+nanog at databit7.com kb3ien+nanog at databit7.com
Fri Nov 7 05:03:17 UTC 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 <charles at thewybles.com>
> To: NANOG list <nanog at nanog.org>
> 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

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