REMX2K-X8-128G CB-RE Description

REMX2K-X8-128G CB-RE Components

Figure 1: REMX2K-X8-128G CB-RE Components

1 — AUX port	5 — USB ports
2 — CONSOLE port	6 — RESET button
3 — MGMT port	7 — XGE-0 and XGE-1 ports
4 — ONLINE/OFFLINE button	8 — EXTCLK0 and EXTCLK1 ports

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.

  Note:

  Use sheilded CAT5e cable for connecting the AUX, CONSOLE, and MGMT ports.

• EEPROM in RE—Stores the field replacement unit (FRU) details of the RE.

• EEPROM in CB—Stores the field replacement unit (FRU) details of the CB.

• RESET button—Reboots the Routing Engine on the CB-RE when pressed.

• ONLINE/OFFLINE button—Makes the Routing Engine on the CB-RE online or offline when pressed.

  Note:

  The ONLINE/OFFLINE button must be pressed for a minimum 4 seconds for the power off or power on to occur.

• LEDs—Provide status of the Routing Engine on the CB-RE.

REMX2K-X8-128G CB-RE LEDs

Figure 2: REMX2K-X8-128G CB-RE LEDs

1 — ONLINE LED, OK/FAIL LED, and MASTER LED	3 — BITS, GPS, and UTI LEDs
2 — DISK1 and DISK2 LEDs	4 — ONLINE/OFFLINE button

REMX2K-X8-128G CB-RE Boot Sequence

The router is shipped with Junos OS and Linux preinstalled on the CB-RE. There are two copies of software:

• One copy on a USB flash drive that can be inserted into the slot on the CB-RE faceplate.

• One copy each on the two SSDs in the CB-RE.

  Note:

  The SSD is internal and cannot be removed.

The Routing Engine interface boots from the storage media in this order: the USB device, SSD1, SSD2, and then the LAN.