RE: Stupid Ipv6

["Scott Morris" <swm () emanon com>]

While the concept of classes has changed, I'm not so sure that I agree with
the complaint here...

Everything I've seen about the multi TLA/SLA concepts always seem to leave
64 bits at the end for the actual host address, so it would be a logical
step at that point to have the ASICs spun so that 64 bits was the limit for
routing tables.

Perhaps I have had the same assumption/misunderstanding that the programmer
guys have had then?!?!?

Scott 

-----Original Message-----
From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of
bmanning () vacation karoshi com
Sent: Saturday, November 20, 2004 9:56 PM
To: Kevin Oberman
Cc: crist.clark () globalstar com; Lars Erik Gullerud; Stephen Sprunk; North
American Noise and Off-topic Gripes
Subject: Re: Stupid Ipv6 


> Just to introduce a touch of practicality to this discussion, it might 
> be worth noting that Cisco and Juniper took the RFC stating that the 
> smallest subnet assignments would be a /64 seriously and the ASICs 
> only route on 64 bits. I suspect that they influenced the spec in this 
> area as expending them to 128 bits would have been rather expensive.

        darn...  and we fought so hard last time we had to expunge
        classfull addressing asics/hardware in the late 1990s.
        looks like it crept back into vendor gear.  IPv6 was -never-
        supposed to be classful.

--bill