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by Sithuk 1454 days ago
"ULA is functionally useless in any IPv6 deployment that has dual-stack operating anywhere."

"ULA per RFC 6724 is less preferred (the Precedence value is lower) than all IPv4 (represented by ::ffff:0:0/96 in the table). Because of the lower Precedence value, if you have IPv4 enabled on a host, it will use IPv4 before using ULA."

https://blogs.infoblox.com/ipv6-coe/ula-is-broken-in-dual-st...