Incus using the same ip range with host which has only one physical device

[alangeb]

There are multiple ways todo this, some of them:

• macvlan (simple, but vm and host can not talk to each other)
• bridge with proxy pass through (but only for individual ports, each needs to be known)
• incus managed / host managed bridge
• …

Assuming you are on Incus (not IncusOS) probably easiest way todo this is to create a host managed bridge, then simply attach your containers/vms to it.

I.e. on Debian (based) distributions you can do similar to this:

auto lo
iface lo inet loopback

auto br0
  iface br0 inet static
  address 192.168.1.250/24
  gateway 192.168.1.1
  bridge_ports enp1s0
  bridge_stp off

iface enp1s0 inet manual

IMPORTANT: If you create a bridge on linux, do not assign an IP to the interface, only to the bridge.

then attach this interface (or create a profile):

incus config device add notpfsense eth0 nic nictype=bridged parent=br0

On IncusOS its easier - the device you see (i.e. eno1) actually is a bridge already.

Here some more details and discussion:

Network without routing

(1) If you really want a DEDICATED NIC for your system you will need a separate physical NIC for each of those - I doubt this is really what you are looking for. Having said that there are for sure usacases for this, I am i.e. running my pfSense routers with dedicated INTEL GbE NICs (on a separate PCIe). I pass them to my pfSense VMs simply using incus config device add pfsense igb nic nictype=physical parent=enp1s0f0 or incus config device add pfsense igb pci address=0000:01:00.0 (2) I know…

Good tutorial in the Documentation:

Directly attach instances to host network