Thus spake Ronald Khoo
> [ It's also weird because /30 and less is legal; /32 is meaningful,
>   but different; but /30 is pretty much meaningless (because it's not
>   pointopoint, so it has a broadcast address, a network address, and no
>   host addresses :-) ]

I think you mean /31.  It goes like this:
  /32:  1 address
  /31:  2 addresses
  /30:  4 addresses
...etc.

So a /30 network still has 2 usable hosts.  I have used this for sites
that used a router and one host on a PPP link.

-- 
D'Arcy J.M. Cain <darcy@{druid|vex}.net>   |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 424 2871     (DoD#0082)    (eNTP)   |  what's for dinner.