On Fri, Oct 01, 2004 at 11:26:58AM +0200, Jeroen Massar wrote: > > I think that the advantages of source filtering are somewhat less > > critical with IPv6. I think one of the primary reasons to add source > > filtering in IGMPv3 was an effort to conserve on Class D addresses > > used for multicasting in IPv4. It's another scheme to extend the > > useful life of IPv4. > > One could also have eg a multicast NTP setup (FF0X::101) and using > source filtering mention that you do not want traffic from certain NTP > sources, or a specific address which can be used for a video conference > chat, using the source address for the quality of the stream etc, eg: > 2001:db8::1 = 1mbit stream, 2001:db8::64 = 64mbit stream, or some > similar scheme, thus it has some value for IPv6 too, but indeed for IPv4 > it is yet another prolongation.
It's also a means of some DoS mitigation for abritrary one-to-many multicast applications (in that arbitrary sources can no longer flood the group-id). To my mind the advantages of source-filtering are equally critical in IPv6 as in IPv4. Mitigating some address exhaustion is just a nice benefit. -- Colm MacCárthaigh Public Key: [EMAIL PROTECTED] -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
