Administrator Guide

138 Hardware Overview
Ventilation System
The Dell Networking N4000 Series switches have two fans. Each switch also
has four thermal sensors and a fan speed controller, which can be used to
control FAN speeds. Verify operation by observing the LEDs.
LED Definitions
This section describes the LEDs on the front and back panels of the switch.
Port LEDs
Each port on a Dell Networking N4000 Series switch includes two LEDs. One
LED is on the left side of the port, and the second LED is on the right side of
the port. This section describes the LEDs on the switch ports.
100/1000/10000Base-T Port LEDs
Each 100/1000/10000Base-T port has two LEDs. Figure 3-23 illustrates the
100/1000/10000Base-T port LEDs.
Figure 3-23. 100/1000/10000Base-T Port LEDs
CAUTION: Remove the power cable from the modules prior to removing the
module itself. Power must not be connected prior to insertion in the chassis.
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