M120 Component LEDs on the Craft Interface
Host Subsystem LEDs on the M120 Craft Interface
Each host subsystem has three LEDs, located in the middle of
the craft interface, that indicate its status. The LED labeled 0 indicates the status of the Routing Engine and CB installed
in slot CB0. The LED labeled 1 indicates the status of the Routing Engine and CB installed in slot CB1. Table 1 describes
the functions of the host subsystem LEDs.
Table 1: M120 Host Subsystem LEDs
Label | Color | State | Description |
|---|---|---|---|
| Green | On steadily | Routing Engine is the master. |
| Green | On steadily | The Routing Engine is functioning. |
Red | On steadily | The Routing Engine has failed. | |
| Green | On steadily | The board is online. |
Blinking | The board is transitioning online/offline. | ||
Red | On steadily | The CB has failed. |
Ethernet Port LEDs on the Craft Interface
Two small LEDs on the bottom of the ETHERNET port indicate the connection in use: the LED lights yellow or green
for a 10-Mbps or 100-Mbps connection, and the LED lights green when
traffic is passing through the port. Related Documentation M Series
RJ-45 Connector Pinouts for the M120 Routing Engine ETHERNET Port
RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLE Ports
RJ-45 Connector Pinouts for the External Clock Ports
FEB LEDs on the M120 Craft Interface
Each FEB has two LEDs on the craft interface that indicate its
status. The LEDs, labeled 0 through 5, are located on the lower right of the craft interface
below the FEBS label. Table 2 describes the functions
of the FEB LEDs.
Table 2: FEB LEDs on the M120 Craft Interface
Label | Color | State | Description |
|---|---|---|---|
| Green | On steadily | FEB is active. |
Blinking | FEB is transitioning online/offline. | ||
| Green | On steadily | FEB is functioning normally. |
Red | On steadily | FEB is not functioning normally. |
FPC LEDs on the M120 Craft Interface
Each FPC slot has one LED that indicates its status. The FPC
LEDs, labeled FPC0 through FPC5, are located along the bottom of the craft interface. Table 3 describes the functions of the FPC LEDs.
Table 3: M120 FPC LEDs
Label | Color | State | Description |
|---|---|---|---|
| Red | On steadily | FPC has failed. |
Green | On steadily | FPC is functioning normally. | |
Blinking | FPC is transitioning online/offline. |
Power Supply LEDs on the M120 Craft Interface
Each power supply has one LED on the craft interface that indicates
its status. The LEDs, labeled 0 and 1, are located on the lower left of the craft interface
under the POWER label. Table 4 describes the functions of the
power supply LEDs.
Table 4: Power Supply LEDs on the M120 Craft Interface
Label | Color | State | Description |
|---|---|---|---|
| Red | On steadily | Power supply has failed. |
Green | On steadily | Power supply is functioning normally. |
External Clocking Inputs LEDs on the M120 Craft Interface
The EXT CLOCK ports are labeled A and B.
Two bi-color LEDs in the lower left and right corners of each port indicate port status. The LED on the lower left as you face the craft interface indicates whether an external clock source is present. The LED on the lower right as you face the craft interface indicates if there is a fault. Table 5 describes the external clock port LEDs,
Table 5: External Clock LEDs on the M120 Craft Interface
Label | Color | State | Description |
|---|---|---|---|
| Green | On steadily | External clock source is plugged into the port, physical signal is present. |
– | Off | No external clock source is plugged into the port, no physical signal is present. | |
(Fault LED) | Yellow | On steadily | Fault condition; external reference clock frequency is out of the tolerance threshold deviation of 10 parts-per-million (PPM). |
– | Off | External clock signal is validated or no external clock source is plugged into the port. |