[Kea-users] Using DHCP Relays

[Oscar Carlsson]

Hi,

I'm just using dnsmasq to create a dhcp relay on my router, and my machine
running Kea just have one interface but many IP ranges to cover all subnets in
Kea.

dnsmasq is easy to configure, this is a complete setup:

dhcp-relay=gateway_ip,dhcp_server_ip
# Disable the DNS server in dnsmasq
port=0

Just repeat dhcp-relay for each subnet in your setup.  I've setup an Ansible
role for this purpose, looping over the interfaces defined on my router.


Regards,
Oscar

"Stefan G. Weichinger" <lists at xunil.at> writes:

> It seems I have to rebuild my DHCP setup.
>
> Currently I have vlan interfaces on the kea-servers to provide DHCP to
> each defined VLAN.
>
> This leads to problems: the VLAN interfaces also set routes to the
> various VLANs, this breaks routing for the Samba DCs also running on
> the same hardware.
>
> (I skip the details, off topic here)
>
> So it seems I have to remove the VLAN interfaces and somehow use a
> DHCP relay (on the existing pfsense) for each of the VLANs.
>
> What I don't yet understand: how to assign requests coming from VLAN X
> to the matching subnet X on Kea?
>
> I read something around "circuit ID" and "agent ID" here:
>
> https://docs.netgate.com/pfsense/en/latest/services/dhcp/relay.html
>
> Could someone share an example how to set that up with kea?
>
> thanks!