Basic network switch redundancy question in multi-WAN pfSense context
It is a common setup for multi-WAN pf setup that a single NIC is used for WAN side with a VLAN switch, with one VLAN configured for each of the WANs. Now, that VLAN switch becomes a potential single-point-of-failure.
What's the very basic way to use two physical switches for this purpose to ensure redundancy? Spanning Tree Protocol and/or LAGG (each link from pf WAN NIC going to each of the switches)?
The same question applies for LAN-side, too.