Management Interface Address

The Fast Ethernet interface fe-0/0/0, labeled PORT 0 on the front panel of the Services Router, is the network interface through which you perform initial router setup. After the router is initially configured, you can attach fe-0/0/0 to the management network for use as a management interface.

Before Initial Configuration

Before initial configuration, when the factory default configuration is active:

1. The Services Router attempts to perform autoinstallation by obtaining a router configuration through all its connected interfaces, including fe-0/0/0. The Services Router acts as a DHCP client out the fe-0/0/0 interface.
2. If the Services Router does not find a DHCP server within a few seconds, it sets the address of fe-0/0/0 to 192.168.1.1/24 and becomes a DHCP server out the fe-0/0/0 interface.

   With the router temporarily acting as a DHCP server, you can manually configure it with the J-Web interface. Any DHCP client host, for example, a PC or laptop computer, directly connected to fe-0/0/0 receives an address on the 192.168.1.1/24 network.

The DHCP functionality for initial setup is different from the configurable DHCP server functionality of the Services Router during operation. To configure the Services Router as a DHCP server, see the J-series Services Router Administration Guide.

During Initial Configuration

Once you connect your laptop or PC to fe-0/0/0, you can use a Web browser to visit the address 192.168.1.1/24, access the J-Web Set Up Quick Configuration page, and initially configure the router.

After Initial Configuration

After you perform the initial configuration and commit it by clicking Apply or OK on the Set Up page, the configured router can no longer act as a DHCP server. You can do either of the following:

• Continue to use the J-Web Quick Configuration and leave the IP address and prefix length as 192.168.1.1/24. You can continue configuring the router until the DHCP lease expires, or the physical connection is lost because the cable is disconnected or the router is rebooted.
• Change the IP address and prefix length. You lose access to the router until you either adjust the IP address of the management device to be on the same subnetwork as the router, or connect to the router through the console port.