linux - Sending netmask and gateway/route with dhcp for ipv6

I have setup a DHCP server to assign ipv6 to my clients. However, both the "routers" and "subnet" OPTIONS are ignored.

I have read that ipv6 does not get theese from the DHCP, rather from the router broatcast.

However, I find this very strange. Why does it get a static IP from the DHCP, but the netmask from the router? Weird architecture.

Anyways, I am wondering if there is a way to easily add these "missing" features to the DHCPv6 or any other work around. The end result should be that I can set the "ip6", "netmask" and "gateway" from one central place, based on the MAC address of the client, just like I can do with ipv4.

I do not want to mess around with ipv6 auto-configuration and stateless stuff.

The gateway problem I could solve in a "bad" way by setting stuff on the "up" event in the network configuration, but I can't find a way to change the netmask of the interface after it has been brought up.

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