Juniper Networks J-Series manual Before You Begin

J-series™ Services Router Administration Guide

2.After the new Services Router acquires an IP address, the autoinstallation process on the router attempts to download a configuration file in the following ways:

a.If the DHCP server specifies the host-specific configuration file (boot file) hostname.conf, the router uses that filename in the TFTP server request. (In the filename, hostname is the hostname of the new router.) The autoinstallation process on the new router makes three unicast TFTP requests for hostname.conf. If these attempts fail, the router broadcasts three requests to any available TFTP server for the file.

b.If the new router cannot locate hostname.conf, the autoinstallation process unicasts or broadcasts TFTP requests for a default router configuration file called network.conf, which contains hostname-to-IP address mapping information, to attempt to find its hostname.

c.If network.conf contains no hostname entry for the new Services Router, the autoinstallation process sends out a DNS request and attempts to resolve the new router's IP address to a hostname.

d.If the new Services Router can determine its hostname, it sends a TFTP request for the hostname.conf file.

e.If the new Services Router is unable to map its IP address to a hostname, it sends TFTP requests for the default configuration file router.conf.

3.After the new Services Router locates a configuration file on a TFTP server, autoinstallation downloads the file, installs the file on the router, and commits the configuration.

Before You Begin

To configure a network for Services Router autoinstallation, complete the following tasks:

■Configure a DHCP server on your network to meet your network requirements.

You can configure a Services Router to operate as a DHCP server. For more information, see “Configuring the Router as a DHCP Server” on page 63.

■Create one of the following configuration files, and store it on a TFTP server in the network:

■A host-specific file with the name hostname.conf for each Services Router undergoing autoinstallation. Replace hostname with the name of a Services Router. The hostname.conf file typically contains all the configuration information necessary for the router with this hostname.

■A default configuration file named router.conf with the minimum configuration necessary to enable you to telnet into the new Services Router for further configuration.

■Physically attach the Services Router to the network using one or more of the following interface types:

■Fast Ethernet

84■ Before You Begin