IgorG,
For the very reason google any everyone runs separate ipv6 sites. If you pipe all ipv6 traffic just to the same address and site anyone with routing issues gets a dead site not found error.
Why else does ipv6.google.com, and many others?
I agree in the future you just co-host, but your assuming everyone has fully functional ipv6, tall ask. How many people I have helped set up tunnels as they could not access ipv6.google.com. Worse other that had ipv6 and could not access certain sites without disabling ipv6 as poor routing using crappy 6to4 preying your getting a good route.
Why else does YouTube and everyone not just publish AAAA records that very reason. Facebook says a million users get cut out.
How to do it separate? Damn simple.
DNS record each domain of ipv6.domain.com with AAAA address
Add ns1 and ns2 ipv6 address
add vhost for each domain kicking the ipv6 address into a separate dir. On my server for ease creating stuff I used domain / httpdocs/httpdocs-ipv6
This way the FTP user can access it.
Yes I could have made up higher a httpdocs-ipv6, but root has to create it, then chown and chcon way too much.
But do not just implement kicking ip6 users to the existing httpdocs, that's suicide. Your assuming everyone has got fully working ipv6, that's anbig assumption.
Why else for world ipv6 day are google and others just for 24 hours publishing an AAAA record for the existing domains - same reason expect to see a million cut off!
Treat it like https you can co host in the existing httpdocs if your crazy, or separate.
It's not hard implementing.
I am happy to help!!!
I got ipv6 now on 24 domains, fully pass hurricane electrics tests, email, httpd and even glue records. I am in no rush to implement a bad force everyone to ipv6 and prey - no way, leave it as it is I got it working.
But look at the Internet in general, no one co hosts, everyone runs ipv6, or some extension to distinguish. This is the only ipv6 implementation that will work. Lookmin the domestic field, name one asl modem that supports native ipv6? Everyone uses 6to4 or tunnels, but 6to4 has big routing issues. I tried it and went to tunnel.
Ipv6 is great but needs to be carefully implemented not just jump fully in and prey.