Re: Usage of IPv6 flow label

[Michael Thomas]

Francis Dupont writes:
 >  In your previous mail you wrote:
 > 
 >      flow label field is not part of AH calculation, but as RSVP already
 >      requires it to be end-to-end (not hop-by-hop) i think we shouldn't
 >      rewrite it in transit.
 >    
 > => I don't read your argument as you. I'll say it should not be rewritten
 > in transit if RSVP is in use. A DiffServ edge router can rewrite it
 > in some situation (it is supposed to know what is RSVP and do the right
 > thing).

   Why would a diffserv router _want_ to rewrite a flow label?
   It can still rewrite the DSCP if it wants. The only thing
   that I've seen mentioned that could actually take advantage
   in the way you are mentioning is using the flow label for
   MPLS label swapping bits.

              Mike
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