zero suppression vs compression in addresses

[michael.dillon at bt.com]

> I think I may have misinterpreted how zero compression and suppression
> work:  when I say 2607:f678:1::0/60, I expect the "::" to 
> mean "all 0's from the preceding digit to the next", but from 
> what I'm seeing configuring things, (leading) zero 
> *suppression* seems to be happening at the same time within 
> word (32 bit) boundaries, which colons always delineate, 
> making that really 2607:f678:0001::0/60.  Thus what I really 
> wanted to say was 2607:f678:1000::0/60.

The rules on this may be about to change. See this draft:
<http://tools.ietf.org/search/draft-kawamura-ipv6-text-representation-02
>

--Michael Dillon