PS4000 Hardware Maintenance Maintaining Control Modules
3–7
Connect cables to network interfaces as follows:
• For copper-based networks, use Category 5E or Category 6 cables with RJ45
connectors. Use Category 5 cables if they meet the TIA/EIA TSB95 standard.
• Connect the interfaces in numeric order, always starting with Ethernet 0.
• Connect the interfaces to different network switches.
• In a dual control module array, to ensure connectivity if one control module
fails, connect a cable to the interface port on each control module. For
example, connect a cable to Ethernet 0 on CM0 and to Ethernet 0 on CM1,
and then connect the cables to a network switch.
For a single control module array, the minimum network configuration is one
network connection to Ethernet 0. However, the single network connection is a
potential point of failure and limits bandwidth. Dell recommends that you connect
Ethernet 0 and Ethernet 1 to different network switches.
For example, if you connect cables as shown in Figure 3-3, and Ethernet 0 fails,
initiators can be redirected to Ethernet 1.
Figure 3-3: Recommended Single Control Module Configuration
For a dual control module array, the minimum network configuration is a network
connection to Ethernet 0 on both control modules. Although this configuration
protects against control module failover, it is still a potential point of failure (for
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