[99001] in North American Network Operators' Group
Re: "2M today, 10M with no change in technology"? An informal survey.
daemon@ATHENA.MIT.EDU (Simon Leinen)
Tue Aug 28 02:40:50 2007
From: Simon Leinen <simon.leinen@switch.ch>
To: Adrian Chadd <adrian@creative.net.au>
Cc: "John A. Kilpatrick" <john@hypergeek.net>, Nanog <nanog@nanog.org>
In-Reply-To: <20070826224644.GM14046@skywalker.creative.net.au> (Adrian
Chadd's message of "Mon, 27 Aug 2007 06:46:44 +0800")
Date: Tue, 28 Aug 2007 08:29:35 +0200
Errors-To: owner-nanog@merit.edu
Adrian Chadd writes [on Cisco's TCAM-based 7600/Cat6500 routers]:
> Its a great sale; they suddenly have hard limits which "the internet
> exceeds", forcing the hardware upgrade cycle. Remember how long the
> Cisco 75xx persisted and note how many people are still running
> Cisco 720x's with NPE-225's or NPE-400's w/ full tables simply by
> adding RAM.
"Simply adding RAM" may not be that easy/cheap, especially when you
have to upgrade it on many linecards (VIP2s anyone?). On distributed
platforms with hardware forwarding in the linecards (GSR) this is/was
probably even worse, you have these "hard limits" in the linecards.
Replacing centralized switching engines from time to time doesn't
seem such a bad value proposition compared to
replacing/memory-upgrading line cards.
--
Simon.
(Who doesn't care much because we're running at ~30'000 IPv4 routes.)
