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Performing the Initial Software Configuration for QFX5200 Switches

Before you begin connecting and configuring a QFX5200, set the following parameter values on the console server or PC:

  • Baud Rate—9600

  • Flow Control—None

  • Data—8

  • Parity—None

  • Stop Bits—1

  • DCD State—Disregard

You must perform the initial configuration of the QFX5200 through the console port using the CLI or through Zero Touch Provisioning (ZTP). In order to use ZTP to provision the device, you must have access to a Dynamic Host Control Protocol (DHCP) server, and a File Transfer Protocol (anonymous FTP), Hypertext Transfer Protocol (HTTP), or Trivial File Transfer Protocol (TFTP) server on which the software image and configuration files are stored. For more information about using ZTP for provisioning the device, see Understanding Zero Touch Provisioning in the Installation and Upgrade Guide.

To connect and configure the switch from the console:

  1. Connect the console port to a laptop or PC using an RJ-45 cable and RJ-45 to DB-9 adapter. The console (CON) port is located on the management panel of the switch.
  2. Log in as root. There is no password. If the software booted before you connected to the console port, you might need to press the Enter key for the prompt to appear.
  3. Start the CLI.
  4. Enter configuration mode.
  5. Add a password to the root administration user account.
  6. (Optional) Configure the name of the switch. If the name includes spaces, enclose the name in quotation marks (“ ”).
  7. Configure the default gateway.
    • For standard Junos OS systems:

    • For Junos OS Evolved systems:

  8. Configure the IP address and prefix length for the switch management interface.
    • For standard Junos OS systems:

    • For Junos OS Evolved systems:


    Although the CLI permits you to configure two management Ethernet interfaces within the same subnet, only one interface is usable and supported.


    On the QFX5200-48Y, the management port em0 is the top right-hand RJ-45 port on the port panel.

  9. (Optional) Configure the static routes to remote prefixes with access to the management port.


  10. Enable services such as SSH and Telnet.

    You will not be able to log in to the switch as the root user through Telnet. Root login is allowed only through SSH.

    • The default option for SSH is yes. Select this to enable SSH.

    • The default option for Telnet is no. Change this to yes to enable Telnet.

  11. Commit the configuration to activate it on the switch.