legend

| Legend
System-Level LEDs
LED | Description
SYSTEM | The SYSTEM LED shows the status of the switch (system).
|  | Off (dark) | Switch is not powered on.
| Solid green | Switch is operating normally.
| Blinking green | Switch is running power-on self-test (POST).
| Solid amber | Switch is faulty, is rebooting, or is in recovery.
| Blinking amber | A fault exists with one of the following: Network module (non-traffic-related) Power supply Fan module
RPS | The RPS LED shows the status of a connected redundant power system (RPS). This LED is available on switches that support an RPS.
|  | Off (dark) | RPS is off or is not properly connected.
| Solid green | RPS is connected and is ready to provide back-up power.
| Blinking green | RPS is connected but is unavailable because it is providing power to another device.
| Solid amber | RPS is in standby mode or is in a fault condition.
| Blinking amber | Switch internal power supply has failed, and the RPS is providing power to the switch.
AC OK | The AC OK LED shows the status of an installed power supply module. This LED does not appear on the Front Panel view for the Catalyst 3750-X switches. This LED is available on switches that support internal power supply modules.
|  | Off (dark) | No power supply module is installed.
| Solid green | Power supply module is installed.
PS OK | The PS OK LED shows the status of the power from the installed power supply module. This LED does not appear on the Front Panel view for the Catalyst 3750-X switches. This LED is available on switches that support internal power supply modules.
|  | Off (dark) | No power from the installed power supply module.
| Solid green | Power from either the installed power supply module or PoE port is good.
| Solid amber | Power from either the installed power supply module or PoE port is faulty.
S-PWR | The S-PWR LED shows the StackPower status. This LED is available on the Catalyst 3750-X switches.
|  | Off (dark) | StackPower cable is not connected or the switch is a standalone switch.
| Solid green | StackPower cable is connected to an XPS-2200 or to another Catalyst 3750-X switch.
| Blinking green | StackPower cable is connected to an XPS-2200, but is unavailable because the XPS-2200 is providing power to another device.
| Solid amber | StackPower cable is in standby mode or is in a fault condition.
| Blinking amber | Switch internal power supply has failed, and the StackPower cable is providing power to the switch.
XPS | The XPS LED shows the status of a connected Expandable Power System (XPS), such as an XPS-2200. This LED is available on the Catalyst 3750-X switches.
|  | Off (dark) | XPS is not connected or is not properly connected.
| Solid green | XPS is connected and is ready to provide back-up power.
| Blinking green | XPS is connected but is unavailable because it is providing power to another device.
| Solid amber | XPS is in standby mode or is in a fault condition.
| Blinking amber | Switch internal power supply has failed, and the XPS is providing power to the switch.
STATUS | The STATUS LED shows that the port LEDs are in status mode. This is the default mode.
|  | Off (dark) | The port LEDs are not showing port status.
| Solid green | The port LEDs are showing port status.
DUPLEX | The DUPLEX LED shows that the port LEDs are in duplex mode.
|  | Off (dark) | The port LEDs are not showing the port duplex mode.
| Solid green | The port LEDs are showing the port duplex mode.
SPEED | The SPEED LED shows that the port LEDs are in speed mode.
|  | Off (dark) | The port LEDs are not showing the port speed.
| Solid green | The port LEDs are showing the port speed.
MASTER | The MASTER LED shows the status of the stack master. This LED is on only if the switch is the stack master or is a standalone switch.
|  | Off (dark) | Switch is not the stack master.
| Solid green | Switch is the stack master or a standalone switch.
| Solid amber | An error occurred when the switch was selecting the stack master switch or a stack error.
STACK | This STACK LED shows that the port LEDs are in stack mode.
|  | Off (dark) | The port LEDs are not showing stack member status.
| Solid green | The port LEDs are showing stack member status.
PoE | The PoE LED shows that the port LEDs are in PoE mode. This LED is available on switches that have PoE ports.
|  | Off (dark) | PoE to the ports is off.
| Solid green | One or more ports is receiving PoE.
| Blinking amber | One or more ports is not receiving PoE because of a fault.
EN | The EN LED shows the status of the Ethernet Management (Fa0) port.
|  | Off (dark) | No link is present on the port.
| Solid green | Link is present between the port and the management station.
CONSOLE | The CONSOLE LED shows the port status of the USB-B console port. This port is available on the 3750-X switches.
|  | Off (dark) | No link is present on the port.
| Solid green | Link is present between the port and the management station.
Back to Top Port-Level LED States
LED Mode | Description
Status | In this mode, the port LEDs show port status, port duplex mode, port speed, PoE status, and stack status. By default, the port LEDs show port status. To display the port duplex mode and the port speed from the port LEDs, you must use the View list from the device manager or the Mode button on the physical switch.
|  | Off (dark) | No link.
| Solid green | Link is up, but there is no activity on the link.
| Blinking green | Link has activity.
| Solid brown | Port is administratively disabled.
| Yellow | Port is error disabled.
| Blinking green and amber | Link is faulty.
| Blinking amber | Port has a Smartports configuration mismatch.
| Solid amber | Port is faulty, is disabled due to an error condition, or is in an STP-blocked state.
Duplex | In this mode, the port LEDs show the duplex mode (full duplex or half duplex) of the ports.
|  | Off (dark) | No link.
| Solid light blue | Port is in half-duplex mode.
| Solid green | Port is in full-duplex mode.
Speed | In this mode, the port LEDs show the operating speed (10, 100, or 1000 Mb/s or 10 Gb/s) of the ports.
|  | Off (dark) | No link.
| Solid light blue | 10 Mb/s.
| Solid green | 100 Mb/s.
| Blinking green | 1000 Mb/s.
| Fast blinking green | 10 Gb/s.
PoE | In this mode, the port LEDs show the status of the Power over Ethernet (PoE) ports. This LED is available on switches that have PoE ports.
|  | Off (dark) | No power is allocated.
| Solid green | Power is allocated.
| Blinking green and amber | Power is denied (to prevent exceeding power capacity).
| Blinking amber | Port is disabled due to a fault condition.
| Solid amber | Port is administratively disabled.
Stack | In this mode, the port LEDs show the switch stack and stack member status.
|  | The STACK LED is off (dark) | Stack mode is off.
| Blinking green | Port number means stack member number.
| Solid green | Stack cable is connected.
| Solid amber | Stack cable is not connected.
Back to Top Port Types
| RJ-45 port
| Small form-factor pluggable (SFP) module slot (empty)
| Fiber-optic SFP module ports
| 1000BASE-T SFP module port
| Cisco Dual SFP X2 converter module (empty)
| 10-Gigabit X2 module slot (empty)
| X2 transceiver module ports (for 10GBASE-LR or -SR)
| X2 transceiver module port (for 10GBASE-CX1 or -USR)
Back to Top Color Wave Length Representation in CWDM Module Ports Note: The circles in the icon for a coarse wave length-division multiplexer (CWDM) module port can be any of eight colors, each denoting a different wave length in nanometers (nm). This table shows the wave length that is denoted by each color. To see the wave length of a CWDM module port, point to its icon.
Color | Wave Length
| Gray | 1470 nm
| Violet | 1490 nm
| Blue | 1510 nm
| Green | 1530 nm
| Yellow | 1550 nm
| Orange | 1570 nm
| Red | 1590 nm
| Brown | 1610 nm
Back to Top