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EX4100-H-12T LEDs

This topic describes the LEDs on the EX4100-H-12T.

The LEDs on the EX4100-H-12T indicate the status of the device and its components. You can also use the LEDs for troubleshooting.

Chassis Status LEDs

Figure 1: Chassis Status LEDs

EX4100-H-12T switches have four chassis status LEDs (labeled SYS, ALM, MST, and CLD) on the rightside of the front panel.

Figure 2: Chassis Status LEDs in EX4100-H-12T Switches Chassis Status LEDs in EX4100-H-12T Switches

The following table describes the chassis status LEDs labeled SYS, ALM, and MST on an EX4100-H-12T switch. The table also describes the LED color patterns and their status descriptions. You can view the colors of the LEDs remotely through the CLI by issuing the show chassis led operational mode command. Note that all LEDs can be lit simultaneously.

For information on the blink patterns of the CLD LED, which provide the cloud connection status of the switch, see Cloud Ready LED Blink Patterns, and to understand how the cloud connection works, see Cloud Connection Process.

Table 1: SYS, ALM, and MST Chassis Status LEDs on the EX4100-H-12T Switch
Label Color State and Description

SYS

Green

  • On steadily—Junos OS is loaded on the switch.

  • Blinking—The switch is booting.

Unlit

The switch is powered off or is halted.

ALM

Red

A major hardware fault, such as a temperature alarm or a power failure alarm, occurred, and the switch is halted.

A major alarm indicates a critical error condition that requires immediate attention

Amber

A minor alarm, such as a software or a hardware error, occurred. Power off the switch and then power it back on. Monitor the switch to see whether it is working properly.

A minor alarm indicates a non-critical condition that requires monitoring or maintenance. A minor alarm that is left unchecked might cause interruption in service or performance degradation.

Unlit

No alarm is in effect, or the switch is halted.

MST

Green

In a standalone switch:

  • On steadily—The switch is functioning normally.

  • Off—The switch is powered off or is halted.

Green

In a Virtual Chassis configuration:

  • On steadily—The switch is the primary one in the Virtual Chassis configuration.

  • Blinking—The switch is the backup one in the Virtual Chassis configuration.

  • Off—The switch is a linecard member in the Virtual Chassis configuration, or the switch is halted.
Note:

When issuing show system alarms, only the ALM LED of the master switch in a Virtual Chassis system glows to display the alarm state. Backup switch and linecard ALM LEDs will be unlit. However, when issuing show chassis alarms, ALM LED glows on all of the individual member switches, displaying their individual alarm states.
Note:

For Virtual Chassis deployments managed from the cloud, the CLD LED on individual Virtual Chassis members will reflect the state of the Master, except when a software download is in progress. When a software download is in progress, the CLD LED on a Virtual Chassis member will display the Junos OS upgrading LED pattern and color.​

Management Port Status LEDs

The management port, labeled MGMT, on the front panel of EX4100-H-12T switches has two LEDs that indicate the link activity and port status.

Figure 3: Management Port Status LEDs Management Port Status LEDs
  1
—

Link activity LED

  2
—

Status LED
Table 2: LEDs on the Management Port on the EX4100-H-12T Switch
Label State Description

Link activity

Green

  • On steadily—The port and the link are active, but there is no link activity.

  • Blinking—The port and the link are active, and there is link activity.

  • Off—The port is not active.

Status

Green

Indicates the speed:

  • On steadily—Link speed is 1000 Mbps.

  • Blinking—Link speed is 100 Mbps.

  • Off—Link speed is 10 Mbps.

PSU Status LEDs on the Switch Chassis

The PSU 0 and PSU 1 LEDs on the chassis display status of the external PSUs connected to the switch.

Figure 4: LEDs on the Chassis to Indicate PSU Connection Status on EX4100-H-12T LEDs on the Chassis to Indicate PSU Connection Status on EX4100-H-12T

The following table describes the colors and statuses of the LEDs.

Table 3: PSU Status LEDs

PSU LED Label

Color

State and Description

PSU 0

PSU 1

Green

9.6~60V input OK

Off

Any of the following:

  • No input supply

  • PSU in standby mode

  • Input cord unplugged or input power lost; with a second power supply in parallel still with input power.

  • Power supply critical event causing a shutdown; OTP, OCP, UVP, OVP

RJ-45 Network Port Status, Virtual Chassis Ports, and Uplink Ports LEDs

The LEDs on the RJ-45 network ports, SFP+ uplink ports, and SFP+ Virtual Chassis ports on EX4100-H-12T switches show the link activity and port status.

Figure 5: LEDs on the RJ-45 Network Ports on EX4100-H-12T Switches LEDs on the RJ-45 Network Ports on EX4100-H-12T Switches
  1
—

Link activity LED

  2
—

Status LED
Figure 6: LEDs on the SFP+ Uplink Ports on EX4100-H-12T Switches LEDs on the SFP+ Uplink Ports on EX4100-H-12T Switches
  1
—

Link activity LED

  2
—

Speed (LED in SPD mode)
Figure 7: LEDs on the SFP+ Virtual Chassis Ports on EX4100-H-12T Switches LEDs on the SFP+ Virtual Chassis Ports on EX4100-H-12T Switches
  1
—

Link activity LED

  2
—

Speed (LED in SPD mode)
Table 4: Link Activity LED on the Network Ports
Link Activity LED Color Link Status LED State and Description

Green

  • On steadily—The port and the link are active, but there is no link activity.

  • Blinking—The port and the link are active, and there is link activity.

  • Off—The port is not active.
Table 5: Link Activity LED and Speed LED (LED in SPD mode) on the Uplink Ports and VC Ports of EX4100-H-12T

LED

Colors

State

Description

Link Activity

Green

Off

Link inactive

On steadily

Link active

Blinking

There is link activity

Speed (LED in SPD mode)

Green

Blinking - 1 per second

Link speed is 1000 Mbps

Solid green

10 Gbps

Port Mode LEDs

The EX4100-H-12T switch has network port mode LEDs (labeled SPD, DX, EN) on the right side of the front panel. These LEDs indicate the status of the network ports. Use the mode button on the right side of the front panel to toggle the status LEDs. You toggle the status LEDs to show the different port parameters for the network ports. The LED that is lit indicates the port parameter. The following table describes the status LEDs.

Figure 8: Port Mode LEDs Port Mode LEDs
Table 6: Port Status of Network Ports Based on States of Port Mode LEDs
LED Color State and Description

SPD

Green

  • On steadily—1000 Mbps

  • On steadily (uplink and Virtual Chassis ports)—10 Gbps

  • Blinking—100 Mbps

  • Blinking; 1 blink per second (uplink and Virtual Chassis ports)—1000 Mbps

  • Unlit—10 Mbps

DX

Green

Indicates the duplex mode

  • On steadily—The port is set to full-duplex mode.

  • Unlit—The port is set to half-duplex mode.

EN

Green

Indicates the duplex mode

  • On steadily—The port is administratively enabled.

  • Unlit—The port is administratively disabled.

Dry Contact Alarm LEDs

The EX4100-H-12T switch has three LEDs to indicate alarm conditions. Two LEDs are for input alarms (IN0 AND IN1) and one LED is for output alarm (OUT).

Figure 9: LEDs on the Dry Contact Alarm on the EX4100-H-12T Switch LEDs on the Dry Contact Alarm on the EX4100-H-12T Switch
Table 7: OUT Dry Contact Alarm LED statuses
OUT  
Color System Status

Off

Alarm OUT not configured, or the switch in off mode.

Green

Alarm OUT configured, no alarm detected, or an input alarm detected with severity NONE.

Red

Output port triggered or activated.
Table 8: IN0 and IN1 Dry Contact Alarm LED Statuses
IN0 and IN1  
Color System Status

Off

Alarm IN0 or IN1 not configured.

Green

Alarm IN0 or IN1 configured, no alarm detected

Blinking Red

Major alarm detected

Red

Minor alarm detected