Alex, I don't agree. This restores the uncertainty that is preventing any current usage.
Brian Alex Conta wrote: > > Making the field "immutable" by "default", but "mutable" when a router > is so instructed by a flow setup and flow processing mechanism is a > compromise that would satisfy all current and future possible cases. > > Therefore I think last sentence of the first paragraph > > All routers MUST pass the field on unchanged when forwarding a > packet. > > should be something like: > > All routers MUST leave the field unchanged, by default, when > forwarding a packet. > A specific flow setup/processing mechanism MAY give a "mutable" > character to the field, > by requesting routers, supporting the mechanism, to change the field > in certain ways. > Routers supporting such a mechanism MUST follow the steps indicated > by the flow > setup and flow processing mechanism. > > Alex > > Brian E Carpenter wrote: > > > > Taking Scott's suggestion, here's another try: > > > > I'd like to propose the following as the > > complete and total replacement of Section 6 of RFC 2460. > > > > The 20-bit Flow Label field in the IPv6 header MAY be set by a > > source to uniquely label sets of packets. Nodes that do not support > > the Flow Label field MUST set the field to zero when originating a > > packet, and MUST ignore the field when receiving a packet. All routers > > MUST pass the field on unchanged when forwarding a packet. > > > > This specification does not further define the meaning of the > > Flow Label. > > > > [and delete Appendix A, which is unhelpful.] > > > > Brian > > -------------------------------------------------------------------- > > 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] --------------------------------------------------------------------
