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Connecting an MX2000 Router to a Console or Auxiliary Device

To use a system console to configure and manage the Routing Engine, connect it to the appropriate CONSOLE port on the RCB interface. To use a laptop, modem, or other auxiliary device, connect it to the AUX port on the RCB interface. Both ports accept a cable with an RJ-45 connector. To connect a device to the CONSOLE port and another device to the AUX port, you must supply two additional cables.


We no longer include a DB-9 to RJ-45 cable or a DB-9 to RJ-45 adapter with a CAT5E copper cable as part of the device package. If you require a console cable, you can order it separately with the part number JNP-CBL-RJ45-DB9 (DB-9 to RJ-45 adapter with a CAT5E copper cable).


The MX2000 router must be adequately grounded before powering on the console or auxiliary devices (see MX2000 Router Grounding Specifications).

To connect a management console or auxiliary device:

  1. Turn off power to the console or auxiliary device.
  2. Plug the RJ-45 end of the serial cable (see Figure 2) into the AUX port or CONSOLE port on the RCB interface. Figure 1 shows the ports. Table 1 describes the auxiliary and console ports.
  3. Plug the socket DB-9 end into the device's serial port.

    For console devices, configure the serial port to the following values:

    • Baud rate—9600

    • Parity—N

    • Data bits—8

    • Stop bits—1

    • Flow control—none

Figure 1: Console and Auxiliary PortsConsole and Auxiliary Ports
Figure 2: Console and Auxiliary Cable ConnectorConsole and Auxiliary Cable Connector
Table 1: Console and Auxiliary Ports on the MX2000 RCB

Function No.





Connect a laptop, modem, or other auxiliary unit.



Connect a laptop or console terminal to configure the MX2000 router.