esxi hosts kea2unbound every couple seconds

[jg3]

Any ideas what could be causing this?

I have these two ESXi hosts in my network. There are lots more but these two are causing all these events in the DHCP log. Both hosts have DHCP reservations for IP addresses and that seems to be working ok.

I'm running pfSense+ 24.11 and the hosts are VMware ESXi 7.0.3 (Andromeda) and 8.0 Update 2 (Perseus).

Aside from the syslog flood, I find the current version of Kea/Unbound to be fragile enough that I don't want this causing more problems.

Thanks for any thoughts you might have here.

--jg

[Gertjan]

@jg3

From here, I see this happening :
kea2bound by itself does nothing, except when it it called by the dhcpv4 server (kea) because where was a lease update, like a renew.

Use Diagnostics > Packet Capture, set the interface to the interface to which this kea server is assigned.
Set view options to high, protocol to UDP and port to "67 68" and start.

You probably will see these two ESXi instances renewing their DHCP leases with the same frequency.

Use the resultant of the packet capturing to see their lease duration, maybe they are told to renew every 10 seconds ^^

[cwagz]

@jg3

I am seeing the same behavior with random physical clients on my network. Turning off the new DNS registration checkbox seems to make it stop.