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Adding the resolution discovered by my team lead;

The screenshot shows the interface flapping because OPNSense is trying repeatedly to grab it to reconnect.
The problem is that OPNSense had already reconfigured the interface as it expected >1 interfaces to start with.

By adding 3 interfaces, OPNSense installer was able to pick 1 for each of LAN/WAN, and PXE off the 3rd successfully.

I have a PXE server in a VM cluster and would like to use it to bring up instances of OPNSense.
I was able to accomplish this with no issues using pfSense, but OPNSense fails to launch the live environment.

FWIW;

Code Select Expand


subnet 10.10.10.0 netmask 255.255.255.0 {
  range  10.10.10.5 10.10.10.50;
  option routers 10.10.10.1;
  option domain-name "domain.local";
  option domain-name-servers 10.127.10.127;
}

host fw001 {
  hardware ethernet bc:30:d9:2a:c9:50;
  fixed-address 10.10.10.163;
  next-server 10.10.10.10;
  filename "/os/bsd/opnsense/boot/pxeboot";
  option root-path "10.10.10.10:/srv/tftp/os/bsd/opnsense/";
}


For OPNSense, the pxeboot is executed, the root-path is read, but eventually NFS connectivity is dropped (see screenshot link).

https://i.imgur.com/YyhdHFF.png

Can anyone assist, or is there a good doc out there for getting OPNSense to install over PXE?