Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Initial Configuration Overview for Juniper Networks Devices

After you install and power on the Juniper Networks device, you are ready to begin initial configuration. All devices have a version of Junos OS preinstalled. The procedures in this guide show you how to connect the device to the network but do not enable the device to forward traffic. For complete information about enabling the device to forward traffic, including examples, see the software configuration guides.

For information about how to upgrade or reinstall software, see the Junos OS Installation and Upgrade Guide.


For an overview of Junos OSand for details regarding configuration statements and CLI commands, see the Overview for Junos OS and the CLI User Guide for Junos OS.

Console access to the device is enabled by default. Use a console port to connect to the device initially.

Gather the following information before configuring the device:

  • Name the device will use on the network

  • Domain name the device will use

  • IP address and prefix-length information for the Ethernet interface

  • IP address of a default device

  • IP address of a DNS server

  • Password for the root user

The most common method of configuring the device is through the use of CLI commands.