How to Access Junos for the First Time - dummies

How to Access Junos for the First Time

By Walter J. Goralski, Cathy Gadecki, Michael Bushong

First-time users of the Junos network operating system most typically access the Junos OS running on their device in one of two ways:

  • Over a network: Someone else installed the device and can provide you with the hostname as well as the username and password assigned to you. The device may be on a separate subnet behind a gateway device that protects unauthorized access to it, in which case, you will also need the login credentials of the gateway server.

  • In direct connection: You are directly connected to the device through the console or a management port using a null-modem or rollover cable. The first time you log into a device that has never been configured, log in as root user, to avoid needing a password. The root user performs any operation from looking at the status of the device to changing the configuration and rebooting the device.

To install and access your new device out of the box, check out the Quick Start Guide for your product. Navigate to your specific product to find the guide for your device.

Whichever way you access your Junos device, follow these steps to log in:

  1. If you are accessing a previously configured device (otherwise skip this step), use a terminal emulation program, such as Telnet, to open a connection. Use netnik as the hostname:

    telnet netnik
  2. At the login prompt, enter your username (use the username root if you are logging in for the first time). At the password prompt enter your password (or press Enter if you are logging in for the first time as the root user):

    netnik (ttyp0)
    login: wiley
    password: ********
  3. If you logged in with the root username (otherwise skip this step), you see a shell, similar to a UNIX shell. Type cli to enter the Junos command-line interface (CLI).

    root@Amnesiac% cli
  4. You are now in the operational mode of the CLI. You see a command-line prompt, which shows your username followed by an @ sign and the hostname of the device. You can enter a ? anywhere in the command-line and receive a list of possible entries.

    wiley@netnik> ?

A few users may access the Junos operating system their first time through one of the Junosphere services available from Juniper Networks. Junosphere offers a virtual network running Junos in a cloud-based delivery model. See the sidebar for more about Junos in the cloud.

Junosphere is a cloud-based environment where users can configure and connect virtual devices that are running Junos to support training, network modeling, and other lab activities. The Junosphere services from Juniper Networks enable realistic, large-scale virtual networks, including a means to interoperate the virtual network with physical network elements.

Additionally, users can incorporate Junos Space, the Junos and Junos Space SDKs, virtualized testing equipment and other lab elements into their network. Together these elements enable organizations to create a highly scalable virtual network of devices running the Junos operating system without requiring dedicated lab resources.