> Indeed. Unfortunately there's no good way to support v6-only clients in > an environment, where dual stacked endpoints do exist as well, see > RFC6147 (DNS64) ch. 6.3.2. > > We still need to find some solution to that problem. >
We've been using two workarounds: 1. Separate DNS resolvers (both BIND 9.8; one DNS64 and the other DNS6). Have the client provisioning system assign the appropriate DNS server IPs (dual-stack to anycast set 1, v6-only to anycast set 2). 2. Use range-specific views to determine whether or not to apply DNS64 (this setup isn't standard BIND, though). One is a kludge, and the other is vendor-specific, but they work. -Jeff
