MultiWAN: PPPoE on FTTH + FWA (same ISP)

[alexdelprete]

Hi,

I have an FTTH primary connection and a backup FWA line. Both via PPPoE, with the same ISP.
When I set MultiWAN, the upstream gw is the same for both, and I noticed some weird issues with routing.

I've already setup MultiWAN in the past, never had issues, but I was never in a condition like this with the same upstream gw for both connections.

I spoke with the ISP support, they told me that I should switch to an active/passive configuration, that means that the FWA interface should come online and negotiate PPPoE session only when the FTTH is down.

Right now the default multiwan configuration is active/active. Can I configure it like support is asking? So OPNsense should bring up the FWA interface only when FTTH is down.

Thanks for any help on this.

Alex