Craft Interface Leds; Component Leds - Juniper MX2020 Hardware Manual

Craft Interface LEDs

The craft interface displays system status messages and allows you to troubleshoot the MX2020 router.
The craft interface is located on the upper front of the router. It contains LEDs, buttons for the router.
LEDs on the craft interface include the following:
Alarm LEDs—One large red circular LED and one large yellow triangular LED, located on the upper right
of the craft interface, indicate two levels of alarm conditions. The circular red LED lights to indicate a
critical condition that can result in a system shutdown. The triangular yellow LED lights to indicate a less
severe condition that requires monitoring or maintenance. Both LEDs can be lit simultaneously. A
condition that causes an alarm LED to light also activates the corresponding alarm relay contact on the
craft interface.
Host subsystem LEDs—The host subsystem consists of a Control Board with Routing Engine (CB-RE).
Three LEDs, MASTER, ONLINE, and OFFLINE, indicate the status of the Routing Engine function of the
host subsystem. A green MASTER LED indicates that the host is functioning as the master. The ONLINE
LED indicates that the host is online. The OFFLINE LED indicates that the host is installed but the Routing
Engine is offline. The Routing Engine component of the host subsystem LEDs located on the upper right
of the craft interface and labeled RE0 and RE1.
Power supply module LEDs—A set of eighteen bicolor LEDs, labeled PSM, indicates the status of each
PSM. Green indicates that the PSM is functioning normally. Red indicates that the PSM is not functioning
normally. The PSM LEDs are located in the top of the craft interface, and are labeled 0 through 8 for
the bottom PSMs, and 9 through 17 for the top PSMs.
Line card LEDs—Twenty bicolor LEDs, LC0 through LC9, for the bottom ten line cards (MPCs), and LC10
through LC19, for the top ten line cards, indicate the status. Green indicates the line card is online, green
blinking indicates that the line card is booting, and the red indicates that a failure. The line card LEDs
located along the bottom of the craft interface.
SFB LEDs—Eight bicolor LEDs, SFB0 through SFB7, indicate the status of each SFB. Green indicates the
SFB is online, green blinking indicates the SFB is booting, and red indicates a failure. The SFB LEDs are
located along the middle of the craft interface along the bottom.
CB-RE—Two bicolor LEDs, CB-RE0 and CB-RE1, indicate the status of each CB-RE. Green indicates the
SFB is online, green blinking indicates the SFB is booting, and red indicates a failure. The CB-RE LEDs
are located along the bottom far left and far right of the craft interface.
Fan Tray LEDs—Four bicolor LEDs, 0 through 3, indicates that the status of the upper two and lower
two fan trays. Green indicates the fan trays are functioning normally, and red indicates that a fan tray
has failed. The fan tray LEDs are located on the upper middle of the craft interface.

Component LEDs

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