We are a public school district that currently uses a Sophos UTM 320 with a 50/50 Mbps fiber connection. We are looking at our options to increase resilience to a connection outage.
Is my understanding here correct? That I can:
1. Connect a second ISP to an unused eth interface on the UTM.
2. Configure the new eth interface as a "Standby" WAN interface.
And that in so doing, if our "primary" ISP goes down, traffic will automatically go over the standby interface? How long does it take for the firewall to notice the disruption to the primary connection and switch over?
Lastly, I gather that while upload thoughput can be increased with multiple WAN links through uplink balancing, download throughput cannot be combined in the same way? Do devices like Peplink that claim to be able to combine the downstream performance of multiple WAN links perform as advertised, or are there caveats?
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