Is it possible to VLAN tag all LAN traffic on the Raspberry Pi's single Ethernet port running LEDE/OpenWRT?
I have several outdoor cellular Internet setups using RPi's, but only a single Ethernet connection to my indoor Cradlepoint router. The Cradlepoint appears to support VLAN tags on the WAN port, and the outdoor PoE switch I'm using to run both RPi's will pass VLAN tags.
My idea is to put a second switch (that will also pass VLAN tags) near the Cradlepoint, and have an Ethernet cable running to it from the each of the two WAN ports I've configured (each with a unique VID). This will allow me to take advantage of the failover and load balancing capabilities of this router. I have several USB modems connected to its USB ports, and utilize its "WiFi as WAN" capabilities from time-to-time as well -- so I'd like to keep it in service.
I've tried doing this several ways using dumb switches and static WAN addresses on the Cradlepoint side with no luck. So -- I'm hoping if I can implement VLAN tags it'll eliminate whatever conflicts are keeping me from utilizing these two cellular WAN devices over a single gigabit Ethernet link.