Dell EqualLogic PS Series Installation And Setup page 22

Installation and Setup Installing Array Hardware
Figure 2-3: Minimum PS5000 Network Configuration
For maximum network bandwidth and availability, it is recommended that you
use six network cables to connect all the network interfaces to multiple network
switches. The switches must be connected together with interswitch links that
have sufficient bandwidth. See Figure 2-4.
Figure 2-4: Recommended PS5000 Network Configuration
2–10