M320 LED Overview

Craft Interface LEDs

The craft interface displays system status messages and allows you to troubleshoot the router.

LEDs on the craft interface include:

Host subsystem LEDs—Three LEDs (one green MASTER, one green OK, and one red FAIL) indicate the status of each host subsystem. The host subsystem LEDs are located on the upper right of the craft interface, and are labeled RE0 and RE1. For more information, see M320 Craft Interface Host Subsystem LEDs.
SIB LEDs—Two LEDs (one red FAIL and one green OK) indicate the status of each SIB. The SIB LEDs are located in the middle of the craft interface, and are labeled 0 through 3. For more information, see M320 Craft Interface SIB LEDs.
Power supply LEDs—Two LEDs (one red FAIL and one green OK) indicate the status of each power supply. The power supply LEDs are located in the middle of the craft interface, and are labeled 0 through 3. For more information, see M320 Craft Interface Power Supply LEDs.
FPC LEDs—Two LEDs (one red FAIL and one green OK) indicate the status of each FPC. The FPC LEDs are located along the bottom edge of the craft interface, and are labeled FPC0 through FPC7. For more information, see M320 Craft Interface FPC LEDs and Online/Offline Buttons.
Alarm LEDs—One large red circular LED and one large yellow triangular LED, located on the upper left of the craft interface, indicate two levels of alarm conditions. You can determine the cause of the alarm condition by looking at the LCD on the craft interface. For more information, see M320 Craft Interface Alarm LEDs and ACO/LT Button.

The following LEDs are located on various router components and display the status of those components:

SIB LEDs—Three LEDs on each SIB faceplate—ACTIVE, OK, and FAIL—indicate the status of that SIB.
See M320 SIB LEDs.
CB LEDs—Three LEDs on each CB faceplate indicate the status of that CB. If no LEDs are lit, the CB is not receiving power.
M320 Control Board (CB) LEDs
PIC LEDs—Each PIC has one or more LEDs that indicates the status of the PIC. For more information, see the M320 Multiservice Edge Router Interface Module Reference.
Power supply LEDs—One LED on each power supply faceplate indicates the status of that power supply.
See M320 Power Supply LEDs.