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- From: E.B. Dreger
- Date: Fri Jun 13 01:03:13 2003
SS> Date: Thu, 12 Jun 2003 23:48:18 -0500
SS> From: Stephen Sprunk
SS> Most L3 switches shipping today (e.g. the product in question) have
SS> particular ethertypes and destination address offsets hardcoded into their
SS> ASICs. It's not a matter of supporting 128-bit addresses -- they simply
SS> doesn't understand IPv6's header any more than they do DECnet or AppleTalk.
SS> While allocation policies may have an effect on how IPv6 FIBs are most
SS> efficiently stored, address length is a fairly small part of the problem
...but there's no sense making the tries more unwieldy than they
need to be.
SS> when you're talking about redesigning every ASIC to handle both IPv4 and
Less redesign required if reusing the existing IPv4 lookup.
Brotsman & Dreger, Inc. - EverQuick Internet Division
Bandwidth, consulting, e-commerce, hosting, and network building
Phone: +1 (785) 865-5885 Lawrence and [inter]national
Phone: +1 (316) 794-8922 Wichita
Date: Mon, 21 May 2001 11:23:58 +0000 (GMT)
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