Can anyone tell me what the expected behavior is when DHCPv6 is enabled on an interface with both a GUA and ULA prefix assigned? In my dnsmasq.conf file I have this configuration...
dhcp-range=lan,::1000,::ffff,constructor:br0,ra-names,slaac,24h dhcp-option=lan,option6:dns-server,[fe80::] dhcp-option=lan,option6:domain-search,mydomain.org br0 has both a GUA from prefix delegation (2601:xxxx) and a manually set ULA (fd00:xxxx) global address prefixes. Clients that request a IPv6 address from the DHCP server are being leased only from the ULA prefix + ::1000-::ffff range and not from the GUA prefix. If I configure br0 with only a GUA then the addresses are leased from the GUA prefix as expected. Is this the expected behavior when both GUA and ULA prefixes are assigned? Is it possible to issue leases for two IPv6 addresses from the DHCP server, one from the GUA prefix other from the ULA prefix? Is it possible to tell the DHCP server which prefix to assign the IP address from, the GUA or ULA? Or maybe this is nothing to do with the server and a client side thing (MacOS clients)? Thanks DAK.
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