Network Port LEDs on QFX5120 Switches
Network Port LEDs on QFX5120-32C Switches
Each SFP+ port on QFX5120-32C switches has one LED that shows the link activity of the port (see Figure 1). See Table 1 to learn more about that LED.
Each QSFP28 port on QFX5120-32C switches has four LEDs that show the link activity of the port (see Figure 2). The first LED operates when the port is not channelized; the other three LEDs operate when the port is channelized. See Table 2 to learn more about those LEDs.

1 — LED for the SFP+ port 32 | 2 — LED for the SFP+ port 33 |
Table 1: LED on the SFP+ Ports on QFX5120-32C Switches
Color | 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. | |
Unlit | The port is not active. |

1 — LEDs on the QSFP28 ports |
Table 2: LEDs on the QSFP28 Ports on QFX5120-32C Switches
Position | Color | State | Description |
---|---|---|---|
1 | Green | On steadily | The port is not channelized, a 100 -Gbps or 40 -Gbps link is established, but there is no link activity. When this LED is on, the LEDs in positions 2 through 4 are off. |
Blinking | The port is not channelized, a 100 -Gbps or 40 -Gbps link is established, and there is link activity. | ||
2–4 | Green | On steadily | The port is channelized, a 25-Gbps or 10-Gbps link is established, but there is no link activity. |
Blinking | The port is not channelized, a 25-Gbps or 10-Gbps link is established, and there is link activity. | ||
1–4 | Unlit | Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |
Network Port LEDs on QFX5120-48T Switches
Each BASE-T port on QFX5120-48T switches has one LED that indicates the status of the port (see Figure 3). See Table 3 to learn more about that LED.
Each QSFP28 port on QFX5120-48T switches has one LED that indicates the status of the port (see Figure 4). See Table 4 to learn more about that LED.

1 — LED for the BASE-T ports in the top row | 2 — LED for the BASE-T ports in the bottom row |
Table 3: LEDs on the BASE-T Ports on QFX5120-48T Switches
Color | State and Description |
---|---|
Green | On steadily—The port is operating at 10-Gbps speed, but there is no link activity. |
Blinking—The port is operating at 10-Gbps speed and there is link activity. | |
Yellow | On steadily—The port is operating at 1-Gbps speed, but there is no link activity. |
Blinking—The port is operating at 1-Gbps speed and there is link activity. | |
Blipping—The beacon function is enabled on the port. | |
Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |

1 — LED for the QSFP28 ports in the top row | 2 — LED for the QSFP28 ports in the bottom row |
Table 4: LED on the QSFP28 Ports on QFX5120-48T Switches
Color | State and Description |
---|---|
Green | When the port is not channelized and is configured to operate as one 100GbE or 40GbE interface:
|
When the port is channelized and is configured to operate as two 50GbE interfaces:
| |
When the ports
| |
Amber | When the port is channelized and is configured to operate as two 50GbE interfaces:
|
When the ports
| |
Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |
Network Port LEDs on QFX5120-48Y Switches
Each SFP28 port on QFX5120-48Y switches has two LEDs that show the link activity and status of the port (see Figure 5). See Table 5 to learn more about those LEDs.
Each QSFP28 port on QFX5120-48Y switches has four LEDs that show the link activity of the port (see Figure 6). The first LED operates when the port is not channelized; the other three LEDs operate when the port is channelized. See Table 6 to learn more about those LEDs.

1 — Link activity LED for the SFP28 ports | 2 — Status LED for the SFP28 ports |
Table 5: LEDs on the SFP28 Ports on QFX5120-48Y Switches
LED | Color | State and 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. | ||
Unlit | The port is not active. | |
Status | Green | On steadily—The port is operating at 25-Gbps speed. |
Blinking—The port is operating at 1-Gbps or 10-Gbps speed. |

1 — LEDs on the QSFP28 ports in the top row |
Table 6: LEDs on the QSFP28 Ports on QFX5120-48Y Switches
Position | Color | State | Description |
---|---|---|---|
1 | Green | On steadily | The port is not channelized, a 100 Gbps or 40 Gbps link is established, but there is no link activity. When this LED is on, the LEDs in positions 2 through 4 are off. |
Blinking | The port is not channelized, a 100 Gbps or 40 Gbps link is established, and there is link activity. | ||
2–4 | Green | On steadily | The port is channelized, a 25-Gbps or 10-Gbps link is established, but there is no link activity. |
Blinking | The port is not channelized, a 25-Gbps or 10-Gbps link is established, and there is link activity. | ||
All | Amber | Blinking | The beacon function is enabled on the port. |
1–4 | Unlit | Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |
Network Port LEDs on QFX5120-48YM Switches
Each SFP28 port on QFX5120-48YM switches has one LED that shows the link activity and status of the port (see Figure 7). See Table 7 to learn more about that LED.
Each QSFP28 port on QFX5120-48YM switches has one LED that shows the link activity and status of the port (see Figure 8). See Table 8 to learn more about those LEDs.

1 — LED on the SFP28 ports on QFX5120-48YM switches |
Table 7: LED on the SFP28 Ports on QFX5120-48YM Switches
Color | State and Description |
---|---|
Green | On steadily—A link is established, but there is no link activity. |
Blinking—A link is established and there is link activity. | |
Yellow | Blinking—The beacon function is enabled on the port. |
Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |

1 — LED on the QSFP28 ports on QFX5120-48YM switches |
Table 8: LED on the QSFP28 Ports on QFX5120-48YM Switches
Color | State | Description |
---|---|---|
Green | On steadily | A link is established, but there is no link activity. |
Blinking | A link is established and there is link activity. | |
Yellow | Blinking | The beacon function is enabled on the port. |
Unlit | Unlit | The port is administratively disabled, there is no power, the link is down, or there is a fault. |