Re: subnet prefix length > 64 breaks IPv6?

[sthaug () nethelp no]

> On the other hand there's also the rule that IPv6 is classless and therefore routing on any prefix length must be 
> supported, although for some implementations forwarding based on > /64 is somewhat less efficient.

Can you please name names for the "somewhat less efficient" part? I've
seen this and similar claims several times, but the lack of specific
information is rather astounding.

Steinar Haug, Nethelp consulting, sthaug () nethelp no