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EX 4200 Switch—Front-Panel LEDs

The front panel of an EX 4200 switch has three LEDs on the far right side of the panel, next to the LCD. Table 5 describes these LEDs, their colors and state, and the status they indicate.

Table 5: EX 4200 Switch—Front-Panel LEDs

LED Label

Color

State and Description

ALM (Alarm)

Unlit

There is no alarm.

Red

There is an alarm.

SYS (System)

Green

  • On steadily—JUNOS software for EX-series switches has been loaded on the switch.
  • Blinking—The switch is booting.

MST (Master)

Green

  • On steadily—The switch is the master in the virtual chassis configuration.
  • Blinking—The switch is the backup in the virtual chassis configuration.
  • Off—The switch is a member (linecard) in the virtual chassis configuration.

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