site local addresses

[Lori Napoli]

From draft-ietf-ipngwg-addr-arch-v3-07 in section 2.4 it states:


Address type Binary prefix IPv6 notation Section
------------ ------------- ------------- -------
Unspecified 00...0 (128 bits) ::/128 2.5.2
Loopback 00...1 (128 bits) ::1/128 2.5.3
Multicast 11111111 FF00::/8 2.7
Link-local unicast 1111111010 FE80::/10 2.5.6
Site-local unicast 1111111011 FEC0::/10 2.5.6
Global unicast (everything else)


Then in section 2.5.6 it states

Site-Local addresses have the following format:

| 10 |
| bits | 38 bits | 16 bits | 64 bits |
+----------+-------------+-----------+----------------------------+
|1111111011| 0 | subnet ID | interface ID |
+----------+-------------+-----------+----------------------------+


So, is it sufficient to say any address that starts with FEC0::/10 is a site local address or does it have to be FEC0::48?

Lori