IPv6 DNS – It works for me….. but it shouldn’t.
When in my IPv6 environment I perform a test ping to, say, Google, it seems to work great:
Which is lovely. But I then ask myself how the ping6 command actually gets to know that name ipv6.google.com lives at IPv6 global address 2a00:1450:8006::6a. How is the domain name being resolved? And I find that I actually don’t know. I’m perfectly familiar with IPv4 DNS. So what’s going on here?
I’m cheating
I discover, upon investigation, that in fact I’m “cheating”. By that I mean that my attempt to set up a “pure” IPv6 environment (albeit in parallel with IPv4) that does not rely upon or touch IPv4 in any way has not been achieved – It turns out that my DNS is currently entirely dependent upon the existing IPv4 infrastructure! And before going ahead and trying to rectify that, it’s actually rather educational to understand how it is actually working at all.
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