Utility PanelThe Utility panel side of the platform contains the fan and power modules.Figure 2. Utility Side1. Fan Trays 2. Power SuppliesPower SuppliesThe Z9500 supports four hot-swappable Power supply units (PSUs) .NOTE: The PSUs must be installed at the customer site.PSUs are field replaceable. To ensure power redundancy and adequate cooling, install four powersupplies in the switch. When running with full redundancy (four PSUs installed and running), you canremove and replace a PSU while the other PSUs are running without disrupting traffic.FansThe Z9500 supports five fan trays with airflow directions from I/O to Utility.The fans must be installed at the customer site.System StatusYou can view Z9500 status information in several ways, including:• LEDs• CLI show commands• Simple network management protocol (SNMP)For more information about these options, refer to the Dell Networking Command Line Reference Guideand Dell Networking Configuration Guide for the Z9500 Switch.As shown in the following figure, the Z9500 includes LED displays on the I/O and Utility side of thechassis. When the Z9500 powers up or reloads, the status LED on the power supplies are solid green.The following table lists the LED definitions for the Z9500 system.12 Hardware Overview