[Kea-users] Overlapping/duplicate subnets

[Sutherland, Rob]

I am in the same situation (i.e. must support overlapping/duplicate IP address ranges). We currently use a heavily-modified ISC DHCP daemon but would love to move to a solution that is


1)      backed by a database and

2)      not so heavily customized.

Cheers,

Rob


From: Kea-users [mailto:kea-users-bounces at lists.isc.org] On Behalf Of S. M. Hossein Hamidi
Sent: Friday, February 03, 2017 12:03 PM
To: kea-users
Subject: [Kea-users] Overlapping/duplicate subnets [faked-from]

Hi all,

My mind is busy with a DHCP scenario that I couldn't end up with a configuration to support that. I am asking here to make sure it is not an oversight.

Suppose that we have several subnets which are behind a NAT device which additionally acts as a DHCP relay agent. I know that using DHCP relay agent information option, I can distinguish between different subnets. However, the additional constraint is to use duplicate or overlapping subnets instead of different subnets. Since, the traffic comes from each segment goes through NAT, it wouldn't be any problem to use duplicate IP addresses, knowing that each segment has its own autonomy.

As far as I know, the lease database use IP address as primary key. So, it seems duplicate IP addresses are not allowed.

Is there any workaround except running several instances of Kea to serve such a topology?

Regards,
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