> -----Original Message----- > From: Thomas Narten [mailto:[EMAIL PROTECTED]] > Sent: Thursday, September 27, 2001 7:44 AM > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: draft-ietf-ipngwg-uni-based-mcast-03.txt > > I have question about the references to SSM. In particular, the > document says: > > > The unicast prefix-based IPv6 multicast address format supports > > Source-specific multicast addresses, as defined by [SSM ARCH]. To > > accomplish is, a node MUST: > > > > o Set P = 1. > > o Set plen = 0. > > o Set network prefix = 0. > > > > These settings indicate that the multicast address is being used in > > source-specific multicast transmission. The source address field in > > the IPv6 header identifies the owner of the multicast address. > > Is it required (or desirable) for the network prefix to be set to 0 as > stated above? I.e., the test for the address being SSM would be > something like: > > - SSM - All IPv6 SSM multicast addresses will have the > format FF3x::/96.
If plen = 0, then isn't the "network prefix" portion 0 bits long? The SSM range should be FF3x::/12 (and this is mentioned in the SSM overview doc today). -Dave -------------------------------------------------------------------- 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] --------------------------------------------------------------------
