[36571] in North American Network Operators' Group
Re: gigabit router (was Re: Getting a "portable" /19 or /20)
daemon@ATHENA.MIT.EDU (alex@yuriev.com)
Tue Apr 10 21:39:30 2001
Date: Tue, 10 Apr 2001 20:03:00 -0400 (EDT)
From: <alex@yuriev.com>
To: "Richard A. Steenbergen" <ras@e-gerbil.net>
Cc: Craig Partridge <craig@aland.bbn.com>, nanog@merit.edu
In-Reply-To: <Pine.BSF.4.21.0104101937230.98098-100000@overlord.e-gerbil.net>
Message-ID: <Pine.LNX.3.96.1010410200131.6377N-100000@cathy.uuworld.com>
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Errors-To: owner-nanog-outgoing@merit.edu
>
> Try ~ 10ns ram which you can buy 256MB of for ~ $60-80
> (www.pricewatch.com). At any rate, A raw 3 or 4 level mtrie FIB fully
> populated with the real 100k+ routes on the internet consumes less then
> 900kb, and all the interesting parts fit in the L2 cache of a Celeron A
> where you can do about 22,000 lookups per MHz. Hardly excessive memory
> bandwidth. The packet ram on the gige cards is also very fast, and could
> easily accomidate a dCEF approach.
CEF should be called Customer Enrangement Feature. It is a very very very
bad idea to have linecards be anything else than forwarders. They should not
make any intelligent routing decisions. There should not be a tons of copies
of routing table on line cards. That is what creates problems.
Alex
