Hello, In draft-ietf-ipngwg-scoping-arch-03 Section Mobility, authors say : "the mobile node MUST NOT try to have a tunnel back into its old zone for the purposes of attempting such communication".
I think it is quite disappointing to forbid this type of tunnel. If a MN is listening to a site-local multicast group, why do you want to break his communication down when he moves into a foreign network located outside the mobile nodes' site ? Scopes aren't great if mobile multicast only works for global scope communications... IMHO, a MN should be able to establish a tunnel with his "multicast home agent" (a home agent involved in multicast routing) to continue multicast communications out of the current scope. There should be no problem for distinguishing two flows from two different sites with the same multicast address because one flow comes natively on the foreign network and the other comes through a tunnel. Is there a way for a mobile node to discover that he has left his home-site ? AFAIK, Router Advertisements only contain prefixes, but no information about scopes. Regards, Xavier. -------------------------------------------------------------------- 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] --------------------------------------------------------------------
