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Chassis Status LEDs in EX4200 Switches
The front panel of an EX4200 switch has three LEDs on the far right side of the panel,
next to the LCD panel (see Figure 10 on page 20).
Figure 10: Chassis Status LEDs in an EX4200 Switch
Table 6 on page 20 describes the chassis status LEDs in an EX4200 switch, their colors
and states, and the status they indicate. Youcan view the colors of the three LEDs
remotely through the CLI by issuing the operational mode command show chassislcd.
Table 6: Chassis Status LEDs in an EX4200 Switch
Stateand DescriptionColorLED Label
There is no alarm.UnlitALM (Alarm)
There is a major alarm.Red
There is a minor alarm.Amber
•
On steadily—JunosOS forEX Seriesswitcheshas been
loaded on the switch.
•
Blinking—The switchis booting.
GreenSYS(System)
•
Onsteadily—Theswitchis themasterinthe VirtualChassis
configuration.
•
Blinking—The switchis the backupin the Virtual Chassis
configuration.
•
Off—Theswitchisa linecardmemberin theVirtualChassis
configuration.
GreenMST (Master)
A major alarm (red) indicates a critical error condition that requires immediate action.
A minor alarm (amber) indicates a noncritical condition that requires monitoring or
maintenance. A minor alarm that is left unchecked might causeinterruption in service or
performance degradation.
NOTE: TheamberglowoftheAlarmLEDthatindicatesaminoralarmcloselyresembles
the red glow that indicates a major alarm.
All three LEDs can be lit simultaneously.
Related Topics Front Panel of an EX4200 Switch on page 9•
Copyright ©2010,Juniper Networks,Inc.20
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