cluster-dns add IPv6 to the documentation #303
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Although RKE2 cluster DNS supports both IPv4 and IPv6, the documentation does not currently mention the option to use an IPv6 address for the cluster DNS. Similarly, users can specify an IPv4, IPv6, or dual-stack address for the cluster DNS.
https://github.com/rancher/rke2/blob/9255fd8fa411695fc93573a6e6dfa9470e13e938/scripts/validate-charts#L54