[Dnsmasq-discuss] about ipv6 prefix delegation

[Carlos Carvalho]

The address range is defined in the dhcp-range declaration. Either you put the
start and end addresses or you use the constructor feature, in which case the
prefix will come from the interface where the request arrived. Note that you
have to configure the ipv6/prefix-length of all the interfaces where dnsmasq
listens.

For static hosts in dhcp-host declarations the address may be whatever you
want, provided it's in the range of any interface (not dhcp-range declaration)
on the machine.