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

RE-MX2000-1800x4 CB-RE Description

RE-MX2000-1800x4 CB-RE Components

Copyright © 2015, Juniper Networks, Inc.
RE-MX2000-1800x4 CB-RE Components on page 61
RE-MX2000-1800x4 CB-RE Boot Sequence on page 62
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.
Interface ports—The
AUX
devices. Each CB-RE has one 10/100-Mbps Ethernet port for connecting to a
management network, and two asynchronous serial ports—one for connecting to a
console and one for connecting to a modem or other auxiliary device. The two SFP+
ports ( and ) provide support for hardware diagnostics and JCS port testing.
XGE-0 XGE-1
The ports provide access to external timing distribution.
ExtClk
EEPROM—Stores the serial number of the CB-RE.
Reset button—Reboots the Routing Engine on the CB-RE when pressed.
, , and ports provide access to management
CONSOLE MGMT
Chapter 7: Host Subsystem Components
61