On Mon, 19 Nov 2001 [EMAIL PROTECTED] wrote: > In an IPv6 home network, there is a possibility that the residential > gateway, learns a different IPv6 prefix after each dial-up; attempts > to communicate using old address would thus fail. This implies that > we should not attempt to trigger dial-up by simply sending the first > packet of a connection.
Just read this quickly.. I may have missed something, but why exactly is this necessary? It seems way too complex to me. Also, it is unclear why there would be a need for new ICMP types; why Echos wouldn't be enough? All in all, dialups (especially for whole subnets) might be getting rarer in the years to come. Wouldn't it just be sufficient that when a dial-up link goes down, the router advertises default router lifetime=0. Hosts have no longer a default route, and all packets they send will be assumed to be on-link. Router can see these on-link messages (or rather, neighbour discovery attempts for foreign addresses like the DNS server), and decide to open the dial-up link based on some heuristics. Then router would advertise the default route and new addresses, which would immediately be used for re-trying DNS queries and the real communications. If link is brought up and down quickly so that the prefix changes, ingress filtering could prevent old addresses from being used. (there are probably some bugs in my above thinking, but it was just a rough idea..) -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords -------------------------------------------------------------------- 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] --------------------------------------------------------------------
