Scb Components; Mx960 Switch Control Board Leds; Switch Fabric Components And Descriptions; Table 60: Scb-Mx Leds - Juniper MX960 Hardware Manual

SCB Components

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MX960 Switch Control Board LEDs

Copyright © 2017, Juniper Networks, Inc.
Each SCB consists of the following components:
Chassis management Ethernet switch
I2C bus logic, used for low-level communication with each component
Component redundancy circuitry
Control Board/Routing Engine mastership mechanism
Gigabit Ethernet switch that is connected to the embedded CPU complex on all
components
Switch fabric—Provides the switching functions for the DPCs, FPCs, and MPCs
Control field-programmable gate array (FPGA)—Provides the Peripheral Component
Interconnect (PCI) interface to the Routing Engine
1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the Routing
Engines
Ethernet switch—Provides 1-Gbps link speeds between the Routing Engine and the
DPCs, FPCs, and MPCs
Circuits for chassis management and control
Power circuits for the Routing Engine and SCB
LEDs—Provide status
MX960 Host Subsystem Description on page 27
MX960 Routing Engine Description on page 29
MX960 Switch Control Board LEDs on page 109
Replacing an MX960 SCB on page 409
Three LEDs on the SCB indicate the status of the SCB. The LEDs, labeled
, and
FABRIC ONLY OK/FAIL
describes the functions of the SCB LEDs.

Table 60: SCB-MX LEDs

Label Color
FABRIC Green
ACTIVE
Green
FABRIC
ONLY
–
Chapter 8: Switch Fabric Components and Descriptions
, are located directly on the SCB.
State Description
On steadily Fabric is in active mode.
On steadily SCB-MX operates in fabric-only mode.
Off SCB-MX operates in fabric/control board mode.
FABRIC ACTIVE
Table 60 on page 109
109
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