Scbe2 Redundancy; Scbe2 Components; Mx240 Scbe2 Leds - Juniper MX240 Hardware Manual

MX240 3D Universal Edge Router Hardware Guide

SCBE2 Redundancy

SCBE2 Components

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MX240 SCBE2 LEDs

104
The control boards operate in redundancy fabric mode by default. You can configure the
control board to be in redundancy mode or in increased fabric bandwidth mode.
For the MX240 router in redundant fabric mode, four of the fabric planes from the first
SCBE2 will be in Active mode, and four fabric planes from the second SCBE2 will be in
Spare mode. Whereas, in an increased fabric bandwidth mode, all the eight fabric planes
will be in Active mode.
Each SCBE2 consists of the following components:
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
External clock interface—Allows BITS or GPS clock source input to the centralized
timing circuit, or allows centralized timing to be output to BITS or GPS
Switch fabric—Provides switching functions for the 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
Circuits for chassis management and control
Power circuits for the Routing Engine and SCBE2
LEDs—Provide status of the SCBE2 and clocking interface
MX240 SCBE2 LEDs on page 104
,
FABRIC ACTIVE FABRIC ONLY
BITS , GPS , and UTI LEDs, located next to the
respective clocking interface. The
indicate the status of the respective SFP+ interface.
functions of the SCBE2 LEDs.
, and LEDs indicate the status of the SCBE2. The
OK/FAIL
EXT CLK port, indicate the status of the
LED located next to the two Ethernet ports,
LINK
Table 59 on page 105
Copyright © 2017, Juniper Networks, Inc.
describes the