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Connect the QFX5250 Switch to External Devices

This topic guides you on how to connect your QFX5250 switch to external management or timing devices.

You can monitor and manage the QFX5250 switch by using a dedicated management channel. Use the management port to connect your device to the management device.

You can also connect the QFX5250 switch to external clocking and timing devices.

Connect the QFX5250 Switch to a Network for Out-of-Band Management

Ensure that you have an Ethernet cable that has an RJ-45 connector at each end.

To connect a device to a network for out-of-band management (OOBM):

  1. Wrap and fasten one end of an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to one of the ESD points on the chassis.
  2. Connect one end of the Ethernet cable to the management port on the device.
  3. Connect the other end of the cable to the management device.
    Figure 1: Connect Your Device to a Network for Out-of-Band Management Connect Your Device to a Network for Out-of-Band Management

Connect the QFX5250 Switch to a Management Console Using an RJ-45 Connector

Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. You will also need the appropriate adapter (not provided) depending upon your console server or management console.

You can separately order the following adapters from Juniper Networks:

  • RJ-45 to DB-9 adapter (JNP-CBL-RJ45-DB9)

  • RJ-45 to USB-A adapter (JNP-CBL-RJ45-USBA)

  • RJ-45 to USB-C adapter (JNP-CBL-RJ45-USBC)

Note:

If you want to use the RJ-45 to USB-A or RJ-45 to USB-C adapter, you must have X64 (64-Bit) Virtual COM port (VCP) driver installed on your PC. See https://ftdichip.com/drivers/vcp-drivers/ to download the driver.

To connect the device to a management console:

  1. Wrap and fasten one end of an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to one of the ESD points on the chassis.
  2. Connect one end of the Ethernet cable to the console port on the device.
  3. Connect the other end of the cable to the console server or PC.
    Figure 2: Connect Your Device to a Management Console Through a Console Server Connect Your Device to a Management Console Through a Console Server
    Figure 3: Connect Your Device Directly to a Management Console Connect Your Device Directly to a Management Console

Connect the QFX5250 Switch to External Clocking and Timing Devices

Connect 1-PPS and 10-MHz Timing Devices

Note: The QFX5250 switch does not currently support timing features. The 1PPS and 10MHz ports may not work as expected.

Your device has GPS clock ports that you can use to connect it to a 1-pulses per second (PPS) and 10-megahertz (MHz) timing device. These ports require 2x1 DIN 1.0/2.3 latching plug connectors.

You can configure your device as a timing primary device or a client device. As a timing primary device, the device receives inputs from the timing device through the input ports and sends outputs to a client device through the output ports. As a timing client device, the device receives inputs from the timing device through the input ports.

To connect your device to a 1-PPS and 10-MHz timing device:

  1. If your device is a timing client device, connect one end of each 2x1 DIN 1.0/2.3 cable to each input port on your device.

    If your device is a timing primary device, connect it to a client device by using the output ports.

    Note:

    Ensure that you use a cable of 3 meters or less.

    Ensure that the timing device supports an input or output impedance of 50 ohms and input and output voltage levels that comply with ITU G.703. The timing device inputs must be 5-volt (V) tolerant.
  2. Connect the other end of each cable to each 1-PPS and 10-MHz connector on the timing device.