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RE: IPv6
From: "Daryl G. Jurbala" <daryl () introspect net>
Date: Fri, 13 Jun 2003 10:20:10 -0400

I guess that means vendor C has no excuse on the 7200 VXR series (and I
believe a few of the newer models).  But I still don't see anthing
fantastically IPv6 happening there.
 
Daryl G. Jurbala
Introspect.net Consulting
Tel: +1 215 825 8401
Fax: +1 508 526 8500
http://www.introspect.net <http://www.introspect.net/> 

PGP Key: http://www.introspect.net/pgp <http://www.introspect.net/pgp>


        -----Original Message-----
        From: stephen () sprunk org [mailto:stephen () sprunk org] 
        Sent: Friday, June 13, 2003 12:48 AM
        To: eddy+public+spam () noc everquick net
        Cc: nanog () merit edu
        Subject: Re: IPv6
        
        
         [.....]  

        Most L3 switches shipping today (e.g. the product in question)
have 
        particular ethertypes and destination address offsets hardcoded
into their 
        ASICs.  It's not a matter of supporting 128-bit addresses --
they simply 
        doesn't understand IPv6's header any more than they do DECnet or
AppleTalk. 

        While allocation policies may have an effect on how IPv6 FIBs
are most 
        efficiently stored, address length is a fairly small part of the
problem 
        when you're talking about redesigning every ASIC to handle both
IPv4 and 
        IPv6. 

         [....]


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