QFX5100 Management Panel
Management Panel of a QFX5100 Device
The management panel of the QFX5100 switch is found on the Field Replaceable Unit (FRU) end of the switch as shown in Figure 1 for 1 U switches and Figure 2 for the 2 U , QFX5100-96S switch. See Figure 3 and Figure 4 for FRUs and management panel detail.

1 — Management panel | 3 — Power supply units |
2 — Fan modules |


1 — Status LEDs | 4 — em0–RJ-45 (1000 Base-T) management Ethernet port
( C0 )Some SKUs have an additional SFP management Ethernet port (second C0 ) |
2 — em1–SFP management Ethernet port ( C1 )Cage (socket for either 1 GbE copper SFP or fiber SFP) | 5 — RJ-45 console port ( CON ) ) |
3 — Reset button, see caution statement
below | 6 — USB port |
Do not use the Reset
button to
restart the power sequence unless under the direction of Juniper Networks
Technical Assistance Center (JTAC).

1 — Status LEDs | 4 — em0–RJ-45 (1000 Base-T) management Ethernet port
(C0) |
2 — em1–SFP management Ethernet port (C1) Cage (socket for either 1 GbE copper SFP or fiber SFP) | 5 — RJ-45 console port (C0N) ) |
3 — Reset button, see caution statement
above | 6 — USB port |
The management panel consists of the following components:
Status LEDs
ALM–Alarm
Unlit indicates the switch is halted or that there is no alarm.
Red indicates a hardware fault, such as a power failure or a system shutdown due to system over-heating.
Amber indicates a major or minor alarm.
SYS–System
Unlit indicates the switch is powered off or halted.
Solid green indicates that Junos OS for QFX Series is loaded on the switch.
Blinking green indicates the switch is:
A participating member in a Virtual Chassis.
A participating leaf device in a Virtual Chassis Fabric (VCF).
A participating spine device in a VCF.
A Routing Engine Primary in a VCF.
A Routing Engine Backup in a VCF.
MST–Primary in a QFX Virtual Chassis or Routing Engine Primary in a VCF
Unlit indicates the switch is a line card member in a Virtual Chassis.
Solid green indicates the switch is:
A standalone switch
In the primary role in a QFX Virtual Chassis
Is the routing engine primary in a VCF
Blinking green indicates the switch is the backup primary in a Virtual Chassis or the backup routing engine in a VCF.
ID–Identification or beacon
Unlit indicates the beacon feature is not enabled.
Blinking blue indicates the beacon feature is enabled. This feature is enabled using the request chassis beacon command.
Switch product number
Management Ports C0 and C1
C0–Use the RJ-45 connectors for 10/100/1000 BaseT or to cable a virtual management Ethernet (VME) interface for spine members in a VCF. See Connect a Device to a Network for Out-of-Band Management.
Note For product SKUs with C0 available in both copper and fiber, the copper C0 has priority over fiber C0.
C1–Use the SFP connector for 1000 BaseX.
USB port for image updates.
Console port (RJ-45) to support RS-232 serial ports. The LEDs above the port indicate status and link.
Management Port LEDs on a QFX5100 Device
The management ports (labeled C0
for 10/100/1000
Base-T and C1
for 10/100/1000 Base-T and SFP
1000 Base-X connections) on a QFX5100 switch have two LEDs that
indicate link status and link activity (see Figure 5). The left LED indicates
status; the right LED indicates link/activity.


1 — Status LEDs | 4 — em0–RJ-45 (10/100/1000 Base-T) management Ethernet
port (C0) |
2 — em1–SFP management Ethernet port (C1) Cage (socket for either 10/100/1000 Base-T RJ45 SFP or 1GbE fiber SFP) | 5 — RJ-45 console port (CON) |
3 — Reset button, see caution statement
below | 6 — USB port |
Do not use the Reset
button to
restart the power sequence unless under the direction of Juniper Networks
Technical Assistance Center (JTAC).
Table 1 describes the management port LEDs.
Table 1: Management Port LEDs on a QFX5100 Switch
LED | Color | State | Description |
---|---|---|---|
Link/Activity | Unlit | Off | No link is established, there is a fault, or the link is down. |
Green | On steadily | A link is established, but there is no link activity. | |
Blinking or flickering | A link is established, and there is link activity. | ||
Status | Unlit | Off | Either the port speed is 10 M or the link is down. |
Green | On steadily | The port speed is 1000 M. | |
Amber | On steadily | The port speed is 100 M. |
Chassis Status LEDs on a QFX5100 Device
The QFX5100 switch series has four status LEDs on the FRU side of the chassis, next to the management ports (see Figure 6).

1 — Status LEDs | 4 — em0–RJ-45 (10/100/1000 Base-T) management Ethernet
port (C0) |
2 — em1–SFP management Ethernet port (C1) Cage (socket for either 10/100/1000 Base-T RJ45 SFP or 1GbE fiber SFP) | 5 — RJ-45 console port (CON ) |
3 — Reset button, see caution statement
below | 6 — USB port |
Do not use the Reset
button to
restart the power sequence unless under the direction of Juniper Networks
Technical Assistance Center (JTAC).
Table 2 describes the chassis status LEDs on a QFX5100 switch, their colors and states, and the status they indicate. You can view the colors of the three LEDs remotely through the CLI by issuing the operational mode command show chassis led.
Table 2: Chassis Status LEDs on a QFX5100 Switch
Name | Color | State | Description |
---|---|---|---|
ALM–Alarm or beacon | Unlit | Off | The switch is halted or there is no alarm. |
Red | On steadily | A major hardware fault has occurred, such as a temperature alarm or power failure, and the switch has halted. Power off the QFX5100 switch by setting the AC power source outlet to the OFF (O) position, or unplugging the AC power cords. Correct any voltage or site temperature issues, and allow the switch to cool down. Power on the QFX5100 switch and monitor the power supply and fan LEDs to help determine where the error is occurring. | |
Amber | On steadily | A minor alarm has occurred, such as a software error. Power off the QFX5100 switch by setting the AC power source outlet to the OFF (O) position, or unplugging the AC power cords. Power on the QFX5100 switch and monitor the status LEDs to ensure that Junos OS boots properly. | |
SYS–System | Unlit | Off | The switch is powered off or halted. |
Green | On steadily | Junos OS for QFX Series is loaded on the switch. | |
Green | Blinking | The switch is participating as:
| |
MST–Primary in a QFX Virtual Chassis or Routing Engine Primary in a VCF | Unlit | Off | The switch is a linecard member in a QFX Virtual Chassis. |
Green | On steadily | The switch is one of the following:
| |
Green | Blinking | The switch is the backup primary in a QFX Virtual Chassis or the backup routing engine in a VCF. | |
ID–Identification | Unlit | Off | The beacon feature is not enabled on the switch. This feature is enabled using the request chassis beacon command. |
Blue | Blinking | The beacon feature is enabled on the switch. This feature is enabled using the request chassis beacon command. |