Brian E Carpenter writes:
 > Yes, the flow label is explicitly excluded from AH. So it could be modified
 > en route and you can't authenticate its value. Assuming we decide to use
 > it as an end2end value, that could be viewed as a bug.

   That would be a pretty funny view. The only
   way to make it immutable would be to share a
   security association with each participating
   router along the way. I don't think we want
   to even vaguely contemplate going there.

           Mike
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