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Extended seq number



Hi, All

I am going thruough the Draft-ietf-ipsec-esp-v3-02.txt.

1)  Extended Sequence number is of 64bits (optioanally) and  the ICV is 
calucluated over the entire 64bits.but the sequence number transmitted  is 
of 32 bits , to keep the overhead low.

Because of  this requirement  implementaion becomes quite complex, at least 
not straight forward.  what  we frame (IPSec header) is different from what 
we send.


-cheers
-ramana