> From [EMAIL PROTECTED] Wed Nov 21 13:46:42 2001 > > Dear Colegeaus, > > In our laboratory we would like to investigate the situation where > two Ipv4 computers are comunicating between only Ipv6 capable cloud. > > ------ ipv4 pkts ------ ipv6 pkts ------ ipv4 pkts ------ > |ipv4|-------------|ipv6|-------------|ipv6|------------|ipv4| > ------ ------ ------ ------ > > Do anybody knows what kind of translation do we have to use > in IPv6 routers to make IPv4 computers to communicate. > > Best wishes, > Csaba Lukovszki
Do you really want header translation, or tunnelling of IPv4 through IPv6? I've been looking at doing IPv6-in-IPv6 tunnelling. While reading up on this I saw that: - GRE (RFC-2784) could do this but does not handle MTU discovery so it looks like you'd have to do some careful MTU setting on the hosts on either side of the routers. Also, the RFC [March 2000] says "IPv6 as delivery and/or payload protocol is not included in the currently deployed versions of GRE." - RFC-2473 seems more complete and should be able to do what you need. 6Wind claims to have RFC-2473. - Cisco's tunnel command seems to allow 6-in-4 tunnels. I don't know about 4-in-6 tunnels, or what tunnelling mechanism (read RFC) they use. Don --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
