Is it really possible to split the issued ipv6 subnet on Mikrotik?

Question

Computer networks

There is RB4011. DomRU.
Configured to receive ipv6 from the provider according to this instruction https://version6.ru/isp/domru/mikrotik-howto
That is, the provider gives a subnet with the ::/64 prefix (65535 addresses), which the router already distributes to the local network.
The local network is divided into 2 subnets (2 bridges). How to make it so that not the entire /64 subnet is issued to bridge1, but to bridge2 figs, and that the /64 network is divided into 2 subnets of (conditionally) 32768 addresses and one part would not be issued to clients on bridge1, and the second to clients on bridge2? At least tell me in the projection on that instruction.

Answer 1

No way. domra gives the ipv6 prefix by SLAAC which by design assumes that the network cannot be less than 64 prefixes. And in general, in general, it is necessary that the network be with a 64 prefix and the provider gives a 56 or 48 prefix.
Regarding domra (by the way, I wrote the manual above), it might be worth refusing to distribute them and take them from a broker or from 6to4 where there will be as many as 48 prefixes, but in both cases a static ipv4 is highly desirable.
Another option is to wait or risk upgrading to router os7, nat for ipv6 appeared there and you can make 1 to 1 forwarding to the desired piece of iron inside the desired network, assign the required number of addresses from one 64 prefix to the external microt.