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Re: exchange point media (was: Re: MAE-EAST Moving? ...)
From: Simon Lockhart <simonl () rd bbc co uk>
Date: Thu, 15 Jun 2000 08:33:08 +0100


The other question is what is the actual capability of the GigaE cards in
a cisco box?  I have been told (not played with GigaE on cisco yet and for
that matter, neither has the person who told me) that it is limited to
around 400Mb/s. 

On a 7xxx Cisco, yes, it's limited to 400Mb/s, due to limitations on the 
interface to the backplane (or VIP2 in the 75xx).

On the Cisco 12000, the backplane interface is 2.5Gb/s, so the GigE cards 
can run at full speed.

Interestingly, no-one seems to have mentioned LINX yet in this discussion. 
LINX have been offering GigE connections to their switch for over a year 
now as a trial, and in the last few months they are now "live". There are 
apparently some LINX members pushing a few 100Mb/s through their GigE 
connection.

E.g. see http://stats.sjc.above.net/traffic/lhr/linx-1.html

Simon
-- 
Simon Lockhart                       |   Tel: +44 (0)1737 839676 
Internet Engineering Manager         |   Fax: +44 (0)1737 839516 
BBC Internet Services                | Email: Simon.Lockhart () bbc co uk 
Kingswood Warren,Tadworth,Surrey,UK  |   URL: http://support.bbc.co.uk/





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