Scbe2 Components; Mx240 Scbe2 Leds; Table 55: Scbe2 Leds - Juniper mx240 Hardware Manual

MX240 3D Universal Edge Router Hardware Guide

SCBE2 Components

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MX240 SCBE2 LEDs

98
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 98
,
FABRIC ACTIVE FABRIC ONLY
, , and LEDs, located next to the
BITS GPS UTI
respective clocking interface. The
indicate the status of the respective SFP+ interface.
functions of the SCBE2 LEDs.

Table 55: SCBE2 LEDs

Label Color
FABRIC Green
ACTIVE
FABRIC Green
ONLY
–
, and LEDs indicate the status of the SCBE2. The
OK/FAIL
EXT CLK
LINK LED located next to the two Ethernet ports,
Table 55 on page 98
State Description
On steadily Fabric is in active mode.
On steadily SCBE2 operates in fabric-only mode.
Off SCBE2 operates in fabric or control-board mode.
port, indicate the status of the
describes the
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