M120 Routing Engine Leds; M120 Control Board (Cb) Overview; M120 Control Board (Cb) Description; Table 6: M120 Routing Engine Led - Juniper Networks Hardware Manual

Related
Documentation

M120 Routing Engine LEDs

Related
Documentation

M120 Control Board (CB) Overview

M120 Control Board (CB) Description

Copyright © 2010, Juniper Networks, Inc.
All manuals and user guides at all-guides.com
M120 Routing Engine LEDs on page 21
Routing Engine Interface Ports and Status Indicators on the M120 Craft Interface on
page 25
Maintaining the M120 Host Subsystem on page 104
Replacing an M120 Routing Engine on page 147
Routing Engine Interface Cable and Wire Specifications for the M120 Router on page 246
Each Routing Engine has one LED that indicates its status. The LED, labeled
located directly on the faceplate of the Routing Engine. Table 6 on page 21 describes
the functions of the Routing Engine LED.

Table 6: M120 Routing Engine LED

Label Color
ONLINE Green
Red
Blue
HDD
M120 Routing Engine Description on page 18
Routing Engine Interface Ports and Status Indicators on the M120 Craft Interface on
page 25
Maintaining the M120 Host Subsystem on page 104
Replacing an M120 Routing Engine on page 147
Routing Engine Interface Cable and Wire Specifications for the M120 Router on page 246
M120 Control Board (CB) Description on page 21
M120 Control Board (CB) LEDs on page 23
Each CB works with an installed Routing Engine to provide control and monitoring
functions for the router (see Figure 12 on page 22). These functions include determining
Routing Engine mastership; controlling power and reset for the other router components;
connecting the FEBs and FPCs; monitoring and controlling fan speed; and monitoring
system status.
State Description
Blinking Routing Engine is transitioning online.
On steadily Routing Engine is functioning normally.
On steadily Routing Engine has failed.
On steadily Hard disk is functioning normally.
Chapter 2: M120 Hardware Components
ONLINE
, is
21