Hi, I would like to use RBM33G and two R11e-LTE modems to create box for video streaming. It should work like:

If eth1 (WAN with DHCP) connected send to internet over eth1
else over LTE1 (WAN)
if LTE1 drop than LTE2 (WAN)

Also will be handy agregate LTE1 and LTE2 if both connected.

So basically failover eth1 -> LTE1 -> LTE2 and if LTE1+LTE2 connected agregate it to get max upload over 2 LTE SIMCards.

What would be the best way/configuration to do it? Bonding, Some script, set default route distance for each interface?

Thanks.