On the MX models is the total VPN throughput the combine throughput of both wan ports or is the throughput for each WAN port? We are moving away from MPLS and I am trying to figure out speeds for each of my wan ports.
I've never seen any official statement regarding that. But if I were to guess, I'd say it's aggregated VPN throughput over all tunnels, regardless of whether that's WAN1 or WAN2, or whether it's AutoVPN or 3d party VPN.
From what I understand, it's aggregated throughput and limited more by internal hardware than uplink speed. You also have to take that max tunnel number with a grain of salt.
Can it form the max tunnel number? Sure! Are those tunnels going to have great performance? Probably not.
I would say it is a hardware limit since the traffic is encrypted to some extent and that takes overhead. All the MX devices have lower VPN throughput than total throughput. Is there a specific device or use case you are trying to analyze?