@paulrob This thread is about 2.5G SFP mode, useful for GPON ONT/ONUs, not about using a 10G SFP+ to 2.5G Ethernet transceiver.

Clive_A wrote Hi @EmuAGR When failover is enabled, backup WAN is offline until the Online Detection fails to ping through primary and tells the router to switch over. It's been like this ever since...

@Clive_A I'll test then as you suggested, with load balancing enabled. But I think that load balancing with primary-secondary shouldn't have used the secondary until after the primary was down (as...

Hello @Clive_A ! I see you enabled load balancing, that's a completely different test case than what I introduced in my first post, as with failover and without load balancing the WANs aren't used...

@Clive_A I can confirm that new sessions are still being sent through secondary WAN3 several minutes (edit: an hour still) after primary WAN1 comes online. I tested with both with speedtest (<1 Gbps)...

Thanks for the reply @Clive_A , It seems that "Backup Mode" addresses exactly my issue. I'm using standalone mode, though, I see both "Mode" options (with a third timed one) but no "Backup Mode"....