Note you could eliminate the blue line for IPv6 nodes to IPv4 with DSTM and implement DSTM Border Gateway, which can be 6to4 aware. /jim
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Jeroen Massar > Sent: Wednesday, March 16, 2005 5:53 AM > To: Michael Banta > Cc: [email protected] > Subject: Re: 6to4 question > > On Tue, 2005-03-15 at 21:02 -0500, Michael Banta wrote: > >Hello. > > > >New to ipv6, have read a lot, still confused... > <SNIP> > >Should the /48 block actually be a 2002: block to be a > compatible 6to4 > >address? If so, why would Hurricane Electric give me a 2001: prefix > >unstead of a 2002? > > Check this picture: > http://unfix.org/projects/ipv6/IPv6andIPv4.gif > > You are the bottom left computer. You have native IPv4 and a proto-41 > tunnel to a 6in4 router (Hurricane Electric). > > If you thus want to send traffic to other IPv4 hosts they go > through the > blue IPv4 cloud, where a lot of routers are and take care that the > packets get delivered. If you want to talk to IPv6 hosts, the packets > get sent to Hurricane Electric's router, which is connected to the red > cloud, which takes care that it gets sent to the correct endhost. > > If you thus want to send a packet to a 6to4 host (anything in > 2002::/48) > the HE router will send it into the red cloud and the red cloud will > send it on to a 6to4 relay, which will deliver it to the 6to4 host. > > See the current assignments here: > http://www.iana.org/assignments/ipv6-unicast-address-assignments > > It does not really matter where you are in this list, the routers will > take care of delivery of packets. > > That said, it _could_ be useful to setup a 6to4 relay your > own, but this > can cause problems because you actually are using non-6to4 addresses, > security issues. Avoiding 6to4 is generally a good idea. 6to4 > in general > should only be used if you need a temporary address and don't really > care about quality or reachability IMHO. The number of relays > is fairly > limited and debugging the traffic is quite difficult caused by > asymmetric paths and other nastyness. > > >This is so confusing. > > Then I hope my short explanation helped a bit ;) > > Also, if you have eth0 for instance, you should announce a /64 on that > wire, not the /48, which is comprised of 65k /64's. > > Greets, > Jeroen > > --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
