Automatic Configuration of a New Services Router

After a new Services Router obtains an IP address, autoinstallation attempts to download a configuration file using one of the following methods:

• Host-specific configuration. If the DHCP server specifies the name of the host-specific configuration file (boot file), the specific filename is used in the TFTP server request. The new Services Router makes three unicast TFTP requests for the specified boot file. If these attempts fail, then the router makes three broadcast requests to any available TFTP server looking for the specified boot file.
• Default configuration. If the boot file cannot be located, or the new Services Router does not receive a specified boot filename from the DHCP server, the autoinstallation process then unicasts or broadcasts TFTP requests for a default router configuration file called network.conf. The default configuration file, network.conf, contains hostname-to-IP address mapping information.

  If there is no entry for the new Services Router, the autoinstallation process sends out a DNS request and attempts to resolve the hostname. If the J-series Services Router can determine its hostname, a TFTP request is sent for the hostname.conf file. The variable, hostname, is replaced by the hostname of the router. If the new Services Router is unable to map its IP address to a hostname, then TFTP requests are sent for the default configuration file, router.conf.

After the configuration file is downloaded from the TFTP server, it is loaded onto the Services Router and committed.