> Since u and g have approximately the same semantics that can be found > in the 8bit prefix of the addres I was believing that they're > necessary only for Ethernet-derived environments, where they can be > exploited by specific Ethernet optimizations for multicast, etc.
The universal bit is defined in 2373bis (addr-arch-v3) to apply to most of the address space, thus it is not tied to the link-layer being Ethernet. And IP-over-Ethernet spec doesn't do anything different as a function of the IID when transmitting packets on the Ethernet. > When other than Ethernet link layers are involved, probably the > functionality of the u/g bits can be derived from the 8bit prefix? > Maybe it's the 8bit prefix that should be tweaked to obtain the > reservations proposed? Do you have a concrete proposal? Erik -------------------------------------------------------------------- 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] --------------------------------------------------------------------
