[Kea-users] Is Interface mandate in kea-DHCPv6 section

[Darren Ankney]

Hi Kraishak,

> Q)
> 1)Is it mandatory to add the interface line in every subnet6 section, unlike subnet4

subnet4 will most likely need the interface specified for a local
subnet as well (see here:
https://kea.readthedocs.io/en/latest/arm/dhcp4-srv.html#how-the-dhcpv4-server-selects-a-subnet-for-the-client).

> 2)If that is mandatory, how can I use multiple subnets? Let's say I have one more network range using the same DHCPv6 appliance, but I don't have any interface on the box. How can we use that

It is indeed mandatory, for the same reason (see here:
https://kea.readthedocs.io/en/latest/arm/dhcp6-srv.html#ipv6-subnet-selection).

If you have another subnet to which the DHCP server has no interface
attached, then there will be a relay agent forwarding the traffic to
the DHCP server.  Then you will use the "relay: {}" mechanism (see
here: https://kea.readthedocs.io/en/latest/arm/dhcp6-srv.html#using-a-specific-relay-agent-for-a-subnet).
But you may not have to if the relay agent source IP is actually part
of one of the subnets configured on your DHCP server.

Thank you,
Darren Ankney