[148094] in North American Network Operators' Group
Re: next-best-transport! down with ethernet!
daemon@ATHENA.MIT.EDU (Mark Tinka)
Tue Jan 3 03:41:21 2012
From: Mark Tinka <mtinka@globaltransit.net>
To: nanog@nanog.org
Date: Tue, 3 Jan 2012 16:40:07 +0800
In-Reply-To: <D51498F0B6E1EF408AC4D63440BFD6F8CB3518EF7B@skbramsx02.emea.att.com>
Reply-To: mtinka@globaltransit.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Friday, December 30, 2011 05:58:38 PM Vitkovsky, Adam=20
wrote:
> Actually an a Cisco presentation on Nexus 7k I asked
> whether it's possible to transport the FCoE over let's
> say EoMPLS or VPLS and did not get a straight answer
> though that was half a year ago -but it would be really
> cool to connect hard-drives directly over continents
We looked at doing this back in 2010, and the problems are=20
still the same - synchronous replications (which is the=20
majority of your garden-variety fibre channel deployments)=20
are very sensitive to latency and low bandwidth, and don't=20
generally tend to exist outside the data centre or short-
distance DWDM fibre channel networks.
=46CIP was the solution proposed for extending SAN's over IP=20
(which invariably means over MPLS as well). But FCIP tends=20
to work best with asynchronous replications, which is the=20
only way to get around higher latency and lower bandwidth=20
network properties.
I know Brocade and Cisco both have boxes that support FCIP.
I did come across a vendor, Orckit-Corrigent -=20
http://www.orckit.com/ - that claimed they support FCoMPLS=20
(I forget what their exact solution was, but it had to do=20
with some buffering trickery if memory serves), but we=20
didn't get a chance to test these as FCoDWDM ending up=20
winning anyway. Come to think of it, maybe their solution=20
was FCIP inside MPLS :-).
Cheers,
Mark.
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