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Perform Initial Software Configuration for the ACX7100-48L Routers

Before you begin connecting and configuring an ACX7100-48L router, 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 ACX7100-48L router through the console port using the command-line interface (CLI).

  1. Connect the console port on the ACX7100-48L to a laptop or desktop PC using an RJ-45 cable and RJ-45 to DB-9 adapter. The console (CON) port is the lower RJ-45 port on the right side of the port panel.

    We no longer include the RJ-45 console cable with the DB-9 adapter as part of the device package. If the console cable and adapter are not included in your device package, or if you need a different type of adapter, you can order the following separately:

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

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

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

    If you want to use 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, to download the driver.


    If your laptop or desktop PC doesn't have a serial port, use a serial-to-USB adapter (not provided).

  2. At the Junos OS login prompt, type root to log in. You don't need to enter a password. If the software boots before you connect your laptop or desktop PC 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. Stop the chassis auto-upgrade process
  6. ZTP is enabled on the ACX7100-48L device in factory default configuration. You must stop ZTP before you proceed to configure any settings.
  7. Add a password for the root administration user account.
  8. Commit the configuration.
  9. Wait for the ZTP process to exit. A message appears on the console, confirming that the ZTP process has stopped.
  10. (Optional) Give the router a name. If the name includes spaces, enclose the name in quotation marks (“ ”).
  11. Configure the default gateway.
  12. Configure the IP address and prefix length for the management port on the router. On the ACX7100-48L, the management port is the upper RJ-45 port on the right side of the port panel and is labeled MGMT.
  13. (Optional) Configure the static routes to remote prefixes with access to the management port.
  14. Enable Telnet service, if needed.

    When Telnet is enabled, you cannot log in to the ACX7100-48L through Telnet using root credentials. Root login is allowed only for SSH access.

  15. Enable SSH service.
  16. To allow users to log in to the router as root through SSH, include the root-login statement.

    By default, users are not allowed to log in to the router as root through SSH.

  17. Commit the configuration. Your changes become the active configuration for the router.