20 Nov
2004
20 Nov
'04
9:55 p.m.
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