teredo prefix question ?

"Mohan Parthasarathy" <[email protected]> Fri, 4 Oct 2002 13:17:41 -0700
Newsgroups gmane.ietf.ngtrans
Message-ID <416B5AF360DED54088DAD3CA8BFBEA6E1DF290@TNEXVS02.tahoenetworks.com>
Why does Teredo require the prefix to be 32 bits (unlike 6t04 which
is 16 bits, just the FP and TLA) ? 

thanks
-mohan