Juniper MX2010, Hardware Manual, Page: 83 / 825

REMX2K-X8-128G CB-RE Components
Figure 24: REMX2K-X8-128G CB-RE Components
AUX MGMT
DISK1
DISK2
RESET
ONLINE/
ONLINE
OK/
FAIL
MASTER
1
XGE-0 XGE-1
LINK
EXTCLK-0 EXTCLK-1
BITS
GPS
UTI
OK/FAIL
CONSOLE
g100078
2
OFFLINE
1 3 2 4
5 6 7 8
REMX2K-X8-128G
REMX2K-X8-128G
5
—
1
—
USB ports AUX port
6
—
2
—
RESET button CONSOLE port
7
—
3
—
XGE-0 and XGE-1 ports MGMT port
8
—
4
—
EXTCLK0 and EXTCLK1 ports ONLINE/OFFLINE button
Each Control Board-Routing Engine (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 as a guest 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 ports—Provides a removable media interface through which you can install Junos OS and Linux
manually. Junos OS supports USB versions, 3.0, 2.0, and 1.1.
•
Solid-state drives (nonremovable)—Provides secondary storage for log files, memory dumps, and system
reboot.
•
Interface ports—The AUX, CONSOLE, and MGMT ports provide access to management devices. Each
CB-RE has one 10/100/1000-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 (XGE-0 and XGE-1) provide support for hardware diagnostics and
JCS port testing. The EXTCLK1 and EXTCLK2 ports provide access to external timing distribution.
59