Multiple IP addresses to single device

I have a four node Kubernetes (k3s) test lab cluster assigned static IP addresses from 10.0.1.141 (node1) - 10.0.1.144 (node4), hostnames are assigned "rk1node1.<mydomain>" to "rk1node4.<mydomain>" .

I have a pool of Load Balancer IPs that can be assigned as required to access internal application stacks, these IPs are 10.0.1.150 - 10.0.1.159.

Firewalla (gold) is intermittently updating the physical device host record with a Load Balancer IP, eg I can no longer SSH into the device via the hostname..

I've tried reserving the IP and setting a static IP outside of the DHCP scope..

Is there a way to stop this from happening, eg lock records MAC,IP and Hostname, for statically assigned IPs that are learned (outside of dhcp scope), or even managing the way A records are added for static IPs... these things are way to clever :-P

example rk1node2 was initially added in FWG with IP 10.0.1.142 but has been magically updated to 10.0.1.151 because of the k3s MetalLB load balancer ip

arp -a

rk1node2.<redacted> (10.0.1.151) at <redacted>:ea:d8:2b [ether] on eth0

? (10.0.1.142) at <redacted>:ea:d8:2b [ether] on eth0

Multiple IP addresses to single device

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