Oh, I am still on US EST time zone and waking up in the middle of the night in 
Beijing.  Please see in line below.

-----Original Message-----
From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On Behalf Of Ben 
Jencks
Sent: Monday, November 08, 2010 5:56 AM
To: Thomas Narten
Cc: ipv6@ietf.org
Subject: Re: draft-ietf-6man-prefixlen-p2p-00.txt


>I'd like to hear from a router vendor on the impact of this on TCAM
>design. I'm under the (possibly mistaken) impression that frequently
>only the first 64 bits are allocated space in the TCAM. If you need to
>route on all 128 bits in hardware, it could halve the number of routes
>you can carry.

>This has probably already been addressed, but I couldn't find it in
>the archives.

Speaking as a router vendor, the possibly-mistaken-impression is so not the way 
IPv6 high-end routers silicon works when the router uses a TCAM.  Sorry, I 
cannot provide any more details on our router implementation, but I can assure 
this audience that Thomas' belief is correct that IPv6 routing continues to be 
based on CIDR.

Hemant
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