> If plen = 0, then isn't the "network prefix" portion 0 bits long?
That would be one interpretation. Another possibly would be that the network prefix should have special meaning, other than looking at the first plen bits. I guess I'm asking if it would make sense to do so, for (say) debugging purposes. > The SSM range should be FF3x::/12 (and this is mentioned in the SSM > overview doc today). draft-holbrook-ssm-arch-02.txt talks about reserving ff3x and ff2x for SSM. draft-ietf-ssm-overview-01.txt says: > Source-Specific Multicast (SSM) : This is the multicast service model > defined in [SSM-ARCH]. An IP datagram is transmitted by a source S to > an SSM destination address G, and receivers can receive this datagram > by subscribing to channel (S,G). SSM is derived from EXPRESS [EXPRESS] > and supports one-to-many multicast.The address range 232/8 has been > assigned by IANA [IANA-ALLOC] for SSM service in IPv4. For IPv6, the > range FF3x::/12 is defined for SSM services [SSM-IPV6]. But that range also covers the address that are defined in this document, including non-SSM addresses! (And it doesn't cover the plen field that defines whether the address is SSM or not!!) So things do not seem to be in sync. Thomas -------------------------------------------------------------------- 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] --------------------------------------------------------------------
