PPPoE: assign a public IP octet

[trigg3r]

In my OPNsense 25.7.11_9-amd64 FreeBSD 14.3-RELEASE-p7 OpenSSL 3.0.18 I need to activate a second WAN interface to connect to the new provider and reconfigure services before deleting my current provider configuration.

Following the instructions, I created VLAN 100 (vlan0.2.100), which I then used as the "Link interface(s)" in the new PPPoE point-to-point device, which I then associated with the WAN2 interface (opt1).

Everything works fine.

The problem is that the PPPoE connection automatically assigns the public IP 1.2.3.4 to the interface, but I purchased a set of public IPs, so I need to set the public IP 5.6.7.8/29.

I tried setting this address in the "Local IP (vlan0.2.100)" field of the PPPoE device configuration, but if I edit the PPPoE device configuration again after saving it, I notice that the IP hasn't been saved (and I don't find any error messages about this in the logs).

Can someone tell me the correct way to handle this situation? (I haven't found any instructions on this in the official documentation.)

Thanks