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2 – General Description
Chassis Controls and LEDs
2-2 59021-04 C
Q
2.1
Chassis Controls and LEDs
Chassis controls include the power supply On/Off switches and the force PROM
button as shown in Figure 2-2. The chassis LEDs include the Over Temperature
LED, Fan Fail LED, Heartbeat LED, and the Input Power LED.
Figure 2-2. Chassis Controls and LEDS
2.1.1
Power Switches
Each power supply has an On/Off switch that controls power to the switch logic
circuitry. To apply power to the switch, place both switches in the On position.
2.1.2
Force PROM Button
The force PROM button is a momentary switch on the front panel. It is used to
recover a disabled switch. Force PROM mode causes the switch to access PROM
when flash memory or the resident configuration file is corrupted. Placing the
switch in force PROM mode forces the default IP address of 10.0.0.1. Refer to
”Recovering a Switch” on page 5-12 for information about force PROM mode.
To place the switch in force PROM mode, do the following:
1. Isolate the switch from the fabric. Open a Telnet session, and enter the
Shutdown command. Refer to ”Shutdown Command” on page B-64.
2. Place both power supply switches in the Off position.
3. Press and hold the force PROM button with a pointed tool for a few seconds,
then place one of the power supply switches in the On position. You can
release the force PROM button after the Input Power LED illuminates. When
the switch is in force PROM mode, the Heartbeat LED illuminates
continuously. Refer to ”Chassis LEDs” on page 2-3 for information about the
Input Power LED and the Heartbeat LED.
To return to normal operation, turn both power supplies off, and then back on.
Chassis LEDs
Left Power
Switch
Right Power
Switch
Force PROM
Button