When you first connect a management PC or laptop to a built-in Ethernet port on a Services Router, the router acts as a DHCP client and attempts to perform an autoinstallation. If it does not find a DHCP server, the router assigns 192.168.1.1/24 as the IP address for port 0. (If you are connected to port 1, 192.168.2.1/24 is assigned as the IP address. On the J2320, J2350, J4350 and J6350 routers, port 2 and port 3 are assigned 192.168.3.1/24 and 192.168.4.1/24, respectively.)
Because this address is not part of any explicit configuration, it is removed when you change the configuration in any way. You must configure an IP address for this LAN port when you commit your initial configuration. (See 4. Configuring Basic Settings with J-Web Quick Configuration or 4. Configuring Basic Settings with the CLI.)
The Web interface to the router—called the J-Web interface—is enabled by default. To configure the router with the Web interface, you attach a PC or laptop to a built-in Ethernet port. The examples in this document use the first built-in Ethernet port:
See 1. Connecting, Logging In, and Starting the J-Web Interface.
Services Routers are shipped with a console cable and adapter. To configure a Services Router through the console port with the JUNOS command-line interface (CLI), you use a terminal emulation program such as Microsoft Windows HyperTermimal. (See 1. Connecting, Logging In, and Starting the CLI.)
To use the following features on a Services Router, you must purchase a license. (See 3. Adding Licenses with the CLI or 4. Configuring Basic Settings with J-Web Quick Configuration.)
J2300 routers have built-in WAN ports. Other models have slots for replaceable Physical Interface Modules (PIMs):
Interfaces are named by type, slot number, module number (always 0), and port number. Port numbering starts with 0. For example:
Although Telnet and SSH are both supported, they are disabled by default.