I have been told not to connect our 2 FC 4500 switches to our newer 5300 switches. But when I backup from the newer san CX4 to the older San CX500 that connects to Commvault everything is going over the network. We are using Commvault 8.0 and I am trying to find the best solution for this bottleneck. Not sure if I should build another media agent attached to both sets of switches, or to somehow Isl switches together without the older 4500 sw's taking ownership of the newer 5300's.