M320 Control Board (Cb) Leds; Table 31: M320 Cb Leds - Juniper M320 Hardware Manual

M320 Multiservice Edge Router Hardware Guide
Related
Documentation

M320 Control Board (CB) LEDs

46
Each CB consists of the following components:
PCI bus—Provides the interface to the Routing Engine.
1000Base-T Ethernet controller—Provides a 1-Gbps link between the Routing Engine
and the on-board Fast Ethernet switch.
Fast Ethernet switch—Provides a 100-Mbps Ethernet link to each FPC for Routing
Engine data transfers.
Three LEDs, located on the CB faceplate, indicate the status of the CB.
Board (CB) LEDs" on page 46
CB online/offline button, located on the CB faceplate.
NOTE: When the adjacent Routing Engine is online, the online/offline
button on the CB faceplate is nonfunctional. For more information, see
"Taking the M320 Host Subsystem Offline" on page
Circuits that control fans and other hardware components in the chassis.
Internally-generated 19.44-MHz Stratum 3 reference clock for line timing.
Two RJ-48 connectors for external clock inputs for 19.44-MHz Stratum 3 reference
clocks.
NOTE: For more information about configuring an interface transmit clock,
see the Junos OS Network Interfaces Library for Routing Devices.
NOTE: For more information about configuring the Junos OS to support
an external clock synchronization interface, see the Junos OS Administration
Library for Routing Devices.
Power circuits for the Routing Engine.
Replacing an M320 Control Board on page 223
M320 Routing Engine Description on page 24

Table 31: M320 CB LEDs

Label Color
Blue
MASTER
Yellow
FAIL
describes the functions of the CB LEDs.
State Description
On steadily Control board is functioning as the master.
On steadily Control board has failed.
"M320 Control
213.
Copyright © 2015, Juniper Networks, Inc.