- play_arrow Understanding Junos OS
- play_arrow Junos OS Software Overview
- About the Overview for Junos OS
- Junos OS Overview
- Junos OS Architecture Overview
- Router Hardware Components
- Junos OS Routing Engine Components and Processes
- Junos OS Routing Processes
- Default Directories for Junos OS File Storage on the Network Device
- Junos OS Support for IPv4, IPv6, and MPLS Routing Protocols
- Junos OS Routing and Forwarding Tables
- Routing Policy Overview
- Junos OS Support for VPNs
- Configuring FIB Localization
- play_arrow Junos OS Security Overview
- play_arrow Junos OS Configuration Overview
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- play_arrow Configuration Statements and Operational Commands
Initial Router or Switch Configuration Using Junos OS
This topic provides an overview of initial network device configuration tasks using Junos OS.
When you turn on a device for the first time, Junos OS automatically boots and starts. You must enter basic configuration information so the device is on the network and you can log in to it over the network.
To configure the device initially, you must connect through the console port.
When you first connect to the console of a device
that has not yet been configured, log in as the user root. At first, the root account requires no password. You can see that
you are the user root, because the command prompt shows
the username root@#.
You must start the Junos OS command-line interface
(CLI) using the command cli. The command prompt root@> indicates that you are the user root and that you are
in Junos OS operational mode. Enter Junos OS configuration mode by
typing the command configure. The command prompt root@# indicates that you are in the Junos OS configuration mode.
When you first configure a device, you should configure the following basic properties:
Device hostname
Domain name
IP address of the device management Ethernet interface. To find the management Ethernet interface that you should use for configuration, see Supported Routing Engines by Router.
IP address of a backup router
IP address of one or more DNS name servers on your network
Password for the root account
