[Kea-users] Many to one Migration from ISC to Kea

[Kraishak Mahtha]

Hi All,

I am currently planning a migration from ISC DHCP to Kea DHCP due to ISC’s
End-of-Life status. In my current ISC environment, I utilize a
"Many-to-One" Active-Active (50/50 load balancing) architecture.

My Current ISC Setup:
I have four servers where "Server-B" acts as a common secondary peer for
three different primary servers:
* Failover-1: Server-A <—> Server-B
* Failover-2: Server-C <—> Server-B
* Failover-3: Server-D <—> Server-B

This hub-and-spoke model is highly efficient for us; by assigning more
resources to Server-B, we can handle traffic for three sites with only four
server instances.

The Challenge with Kea:
Based on my research, Kea’s Hub-and-Spoke model currently only supports
Active-Passive (Hot-Standby). To achieve Active-Active load balancing in
Kea, it appears I am limited to 1-to-1 pairs, which would require six
server instances (three separate pairs) to achieve the same result. This
significantly increases our infrastructure and resource management.

Looking for some advice from the community:

1)Is there any way to achieve a Many-to-One Active-Active relationship in
Kea using current stable versions

2)For those of you who moved from a similar ISC setup, how did you handle
the jump from 4 servers to 6? Are there any middle-ground configurations I
might have missed?

3)Does anyone know if the developers are considering adding Many-to-One
Load Balancing to the roadmap, or is the architecture strictly staying
One-to-One for now?

I appreciate any guidance or insights from those who have faced similar
multi-site migration challenges.

Thanks in advance
Kraishak
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