Are you trying to route between the networks? It would work technically but I would not advise it, as you are running all your traffic through the fw engine which adds latency which is not good for a SAN network.I'm going to be running plex and some other streaming gear. Can you run link aggregation in sophos to get 2gb links between the networks? I have my San on a separate subnet from my main network. I'd like to run 2gb from my one subnet to the other subnet.