Re-Mx2000-1800X4 Cb-Re Components - Juniper MX2020 Hardware Manual

Table 14: Components on the RE-MX2000-1800x4 (continued)
Function No.
9
10
11

RE-MX2000-1800x4 CB-RE Components

Each CB-RE consists of the following 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.
1000Base-T Ethernet controller
Circuits for chassis management and control.
Power circuits for the CB-RE.
Control FPGA—Provides the Peripheral Component Interconnect (PCI) interface to the routing engine.
Gigabit Ethernet switch that is connected to the embedded CPU complex on all components.
CPU—Runs Junos OS to maintain the router's routing tables and routing protocols.
I2C bus logic, used for low-level communication with each component.
DRAM—Provides storage for the routing and forwarding tables and for other routing engine processes.
Component redundancy circuitry.
USB port—Provides a removable media interface through which you can install the Junos OS manually.
Junos OS supports USB version 1.0.
CompactFlash card—Provides primary storage for software images, configuration files, and microcode.
The CompactFlash card is fixed and is inaccessible from outside the router.
Solid State Disk (non-removable)—Provides secondary storage for log files, memory dumps, and rebooting
the system if the CompactFlash card fails.
Label
GPS, and BITS
XGE-0 and XGE-1
ONLINE, MASTER, and
OK/FAIL
Description
There is one bicolor LED for each external clock
interface—BITS and GPS.
These ports are used for hardware diagnostics
and are for Juniper-internal use only.
There is one bicolor LED for each CB-RE
control. The ONLINE LED indicates that the
CB-RE is transitioning online and functioning
properly. The MASTER LED indicates that this
board is a master Control Board and Routing
Engine (CB-RE) , and the OK/FAIL LED indicates
the CB-RE has failed.
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