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Doubt regarding sequence number....



hi,
	i have a doubt regarding generation of the sequence numbers 
in the AH and the ESP headers. is this sequence number per packet, 
or, per protocol? 
	assuming a situation like this:

[IP] [AH] [ESP] [Upper]

is the sequence number in both AH and ESP in the above situation 
the same? or, should i have separate counters for AH and ESP? 
What about a situation like this:

[IP] [AH] [AH] [ESP] [Upper]        (Though might not be used, 
this is a possibility)

regards,
arvind.



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