Hi.
I'm investigating migrating from ISC DHCPd to Kea and running into a few
issues.
I see some conflicting information online, due to kea development over
time, so I was hoping to ask here for some clarification.
1) Is it really necessary to install a database backend such as
Postgres/MySQL if I want to have static host reservations? This was
working so perfectly with dhcpd without any db backend for such a long
time. Not having a DB backend on the DHCP server means one less thing
to worry about when Kea is updated, or the DB updated. I accept that
performance of the DB is likely going to be better than the reservations
being stored in a text file, but for my basic setup, it just doesn't
matter to me. The simplicity of not needing a DB for this over-rides the
performance gain that may be attained with a DB. I just want to be sure
that I haven't overlooked something.
2) Does Kea permit multiple ethernet addresses mapped to the same IPv4
IP? I do this for multiple reasons - for example, I may have a server
that has 2 ethernet addresses, and when I plug it in, whether I use one
or the other network port, the IP should be the same. Obviously I
shouldn't plug in both or things would break, but that would be my
problem. At the same time, maybe a laptop has an ethernet port built
in, but when plugged into a dock that has its own network port, I want
the machine to get the same IP one way or the other (static
reservation). Now, I think I can permit this by enabling
"ip-reservations-unique" to false, but I wanted to clarify. Again, I
did this with DHCPd all the time.
3) Finally - does Kea permit multiple IPv4 IPs for the same ethernet
address? I believe that "ip-reservations-unique" does not permit this,
yet this is more important for me, and I did this with dhcpd. For
example, in different places in the building there are different VLANs.
Most hosts just get a static IP reservation from DHCP. 99% of hosts
will ever be on one VLAN. However, for say, my test laptop that has a
single IP reserved on every VLAN - can Kea handle this scenario?
Answers to these questions would be a great start!
Thanks for reading..
Jason.
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