Looking for a solution to multipath over two LTE connections in a moving vehicle. Also cheap is good here (nonprofit) :)
There are high-end vendors selling gear, but haven't really found out much in the opensource world. Was thinking of setting for example Raspberry PI or a mini-pc with two LTE dongles and then create GRE/something tunnels to our DC.
I'm more concerned about the latency than the throughput. I have couple 150Mbps LTE connections from two ISPs but when you drive through a tough spot the other might be 10Mbps and the other 0,1Mbps. I'd like the connection to switch over to the faster in that case, even if the second one was alive.
Usually all the cheaper end routers advertising "Dual SIM failover" have only one radio, and fail over after 10-30s downtime and then it takes a while to get the other connection up. That's quite a long time and the vehicle probably has already passed through the blind spot for the second ISP.
I've heard a story about a guy doing this with a Mikrotik router where he just duplicated packets over both LTEs and then at the DC end just dropped the packets coming in later.
Any ideas? Thanks!
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