System status LEDs are located on the front of the switch. The following table describes the colors and the states for the LEDs.
|
LED |
Color/State |
Port State |
|---|---|---|
|
SYStem status LED (Legacy MGMT function) Note: The system status LED is solid green to indicate normal operation when the switch is running Fabric Engine.
|
Green flash slowly |
POST Passed, normal operation, blinks on standalone switch, stack master, and backup nodes in a stack; off for standby nodes in a stack |
|
Green blinking |
POST in progress | |
|
Amber blinking |
POST failed or overheat | |
|
PSU status LEDs P1/P2 |
Green |
Power On |
|
Off |
Power off and no power attached | |
|
Amber blinking |
Power supply failures | |
|
Fan status LEDS (F1, F2 and F3) |
Green |
Normal operation |
|
Amber blinking |
Fan failure | |
| Amber | Fan absent | |
|
Bluetooth Status LED (BT) |
Green blinking |
Bluetooth pairing in progress |
|
Green |
Bluetooth connected | |
|
Locator LED (LOC) |
Blue blinking |
Locator function |
The following figure shows the two alternate mode LEDs for 5520 Series switches: SPD and STK. The Mode button is used to cycle through three display modes for the port LEDs. In the default mode, SPD and STK are off. SPD and STK display modes expire after 30 seconds, at which time the port LEDs revert to the default SYS mode.
Note
Front-panel PoE ports use Amber to indicate PoE states.
In the default SYS mode, SPD is OFF, and the port status displays behavior for link, traffic, and PoE as described in the following table:
|
Color/State |
Meaning |
|---|---|
|
Green |
Link is OK; port is not powered |
|
Amber |
Link is OK; port is powered; no traffic |
|
Blinking green |
Link is OK and transmitting packets; port is not powered |
|
Blinking amber |
Link is OK and transmitting packets; port is powered |
|
Slow blinking amber |
No link, or disabled port; port is powered |
|
Alternating amber and green |
Port has a power fault |
|
Off |
Port is not powered, has no link, or is disabled |
After one press of the Mode button, the port LEDs enter the SPD (speed) Display Mode, indicated by the SPD LED. SPD mode is used to help determine the operational speed of a port.
There are two LEDs per QSFP28 port on 5520 models. In stack mode, the first LED represents the link state and traffic of the stack port with solid or blinking green. When a QSFP28 port is used for Ethernet and partitioned to 4x10 or 4x25, one LED is shared for two ports. The first LED indicates state for the first two ports and the second LED indicates state for the second two ports. The LED is on or blinking green to indicate link and traffic when any of the 2 ports are up. It is off when both ports are down. In partitioned 2x50, each LED represents link and traffic for one 50G port. In aggregate 1x40 mode, the first LED indicates the port state and traffic and the second LED is off. Color and blink patterns indicate speeds, as referenced by the following table:
|
Color/State |
Speed |
|---|---|
|
Slow blinking green |
10Mbps |
|
Fast blinking green |
100Mbps |
|
Solid green |
1000Mbps |
|
Slow blinking amber |
2.5Gbps |
|
Fast blinking green |
5Gbps |
|
Slow blinking green |
10Gbps |
|
Fast blinking green |
25Gbps |
|
Fast blinking green |
40Gbps |
|
Fast blinking green |
50Gbps |
After two presses of the Mode button, the port LEDs enter the STK Display Mode, indicated by the STK LED. STK mode is used to indicate slot presence and slot number via the first eight port LED, as referenced by the following table:
|
Color/State |
Speed |
|---|---|
|
Green |
Slot corresponding to the port number of the LED is present |
|
Blinking green |
This slot has slot number corresponding to the port number of the blinking LED |
| Right side LED | State | |
|---|---|---|
| Link | Green | Link up |
| Off | No link up or port disable | |
| Left side LED | State | |
| Act | Blinking green | Packet transmitting or receiving |
| Off | No packet transmitting or receiving | |
[enable | disable] led locator.