Francis Dupont wrote: > > In your previous mail you wrote: > > >> PS: I can read between the lines that an end-to-end usage of > > the flow label is proposed. IMHO this is only a waste of bits, > > the flow label is in the header in order to be available to > > intermediate nodes. For end-to-end options, a destination header > > fits better. > > There's nothing between the lines: the argument is *very explicit* > that we want e2e flow labels if they are to be of any use for QOS > > => I believe we have to define more accurately what are e2e flow labels: > (1) information for the peer node > (2) information for intermediate routers that doesn't change en route. > > (intserv, diffserv, or any future QOS solution). > > => so your interpretation is (2)
Yes. There is a theoretical possibility of the destination host looking at the label for internal dispatching, but I think that last place that is really likely is in the destination NIC. > > An extension header is useless. It's too clumsy and too far down the > packet for line-speed hardware matching. > > => but for (1) you should agree a destination option is better. Yes, probably. Brian > > Regards > > [EMAIL PROTECTED] > > PS: I agree with (2) if end-to-end stands for domains (with as constrainted > as you'd like definition of a domain). > -------------------------------------------------------------------- > IETF IPng Working Group Mailing List > IPng Home Page: http://playground.sun.com/ipng > FTP archive: ftp://playground.sun.com/pub/ipng > Direct all administrative requests to [EMAIL PROTECTED] > -------------------------------------------------------------------- -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Brian E Carpenter Distinguished Engineer, Internet Standards & Technology, IBM On assignment at the IBM Zurich Laboratory, Switzerland Board Chairman, Internet Society http://www.isoc.org -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
