Juniper MX960 Hardware Manual page 145

SCBE2-MX Components
SCBE2-MX Slots
SCBE2-MX Fabric
Planes and Redundancy
Weight and Dimensions
Copyright © 2017, Juniper Networks, Inc.
Two 10-Gigabit Ethernet SFP+ ports. SFP+ port 0 can be used to connect an external device
as a Router Reflector. SFP+ port 1 is unused.
Control Board and Routing Engine (CB-RE) mastership mechanism.
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 MPCs.
1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the Routing Engines.
Power circuits for the Routing Engine and the SCBE2-MX.
LEDs—Provide status of the SCBE2-MX and the clocking interface.
For the MX960:
You can install up to three SCBE2-MX's in the MX960 router chassis.
SCBE2-MX's are installed vertically into the front of the MX960 chassis in the slots labeled
, and . If any slots are empty, you must install a blank panel.
1 2
The two SCBE2-MX's residing in slot 6 and slot 7 of the MX960 chassis provide both control
and switch fabric features, while the third SCBE2-MX residing in slot 8 of the chassis (hybrid
slot) will only do fabric functions.
For the MX480 and MX240 routers:
You can install either one or two SCBE2-MX's in the MX480 and MX240 router chassis.
SCBE2-MX's are installed horizontally into the front of the MX480 and MX240 chassis in the
slots labeled 0 and 1. If any slots are empty, you must install a blank panel.
For the MX960:
Each SCBE2-MX provides two switch fabric planes for packet forwarding among the MPCs in
the MX960.
The MX960 chassis may contain up to three SCBE2-MX's Therefore, six fabric planes are
available.
Three SCBE2-MX's are required for 2 + 1 redundancy.
In redundant fabric mode, four fabric planes from the first two SCBE2-MX's will be in Active
mode, and two fabric planes from the third SCBE2-MX will be in Spare mode.
In an increased fabric bandwidth mode, all six fabric planes will be in Active mode.
For the MX240 and MX480 routers:
Each SCBE2-MX provides four switch fabric planes for packet forwarding among the MPCs in
the MX480 and MX240 chassis.
The MX480 and MX240 routers contain a maximum of two SCBE2-MX's. Therefore, eight
logical planes are available.
Two SCBE2-MX's are required for 1 + 1 redundancy.
In redundant fabric mode, four fabric planes from the first SCBE2-MX will be in Active mode,
and four fabric planes from the second SCBE2-MX will be in Spare mode.
In an increased fabric bandwidth mode, all eight fabric planes will be in Active mode.
Each fabric ASIC is configured in virtual plane mode, where two virtual planes exist on one
fabric ASIC.
Weight: 9.6 lb (4.4 kg) (with Routing Engine installed)
Width: 17 in (43.2 cm)
Depth: 22 in (55.9 cm)
Height: 1.25 in (3.2 cm) height.
Chapter 8: Switch Fabric Components and Descriptions
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