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Re: Extended seq number
At 12:05 PM -0700 4/23/02, Ramana Yarlagadda wrote:
>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
The high order 32 bits of the ESN are appended to the packet
specifically to make it easier to strip them prior to transmission.
I don't know how to make it easier, and still not send the extra bits.
Steve