Custom IPv6/DHCPv6 prefixlen

[ppfeufer]

Prerequisites

• I have checked the Wiki and Discussions and found no answer

• I have searched other issues and found no duplicates

• I want to request a feature or enhancement and not ask a question

Description

What problem are you trying to solve?

Trying to get DHCPv6 up and running, but it fails me due to the wrong prefixlen.

Proposed solution

Option to set the prefixlen in the DHCP settings

Alternatives considered

Not using AGH as DHCP, but what's the purpose in having it then? The function built-in I mean ...

Additional information

I'm facing a bit of an issue here ...

My FRITZ!Box as the Gateway has it's own IPv6 address with a prefixlen of /64 which I cannot change at all. AGH seems to hand out IPv6 with a prefixlen of /128. Meaning, all the devices in my network that receive their IPv6 from AGH and do not have them set statically, can't communicate, because they are in a completely different (sub)network.

This conundrum makes IPv6 a bit unusable for me at the moment.

AGH DHCPv6 Settings

DHCPv6 Auto Configuration from AGH

Result when trying to use IPv6 via AGH DHCPv6:

So it would be nice if we could have an option to set the right prefixlen for IPv6, since this is not supported by every Gateway/Router (FRITZ!Box in my case).

Thank you!

[ppfeufer]

PS.: And at some point I learn how to write a title properly :-)