1-11 Automatic ConfigurationWhen configuring automatic configuration, go to these sections for information you are interested in:z Introduction to Automatic Configurationz Typical Networking of Automatic Configurationz How Automatic Configuration WorksIntroduction to Automatic ConfigurationAutomatic configuration enables a device to automatically obtain and execute the configuration filewhen it starts up without loading the configuration file.Automatic configuration simplifies network configuration, facilitating centralized management ofdevices. Currently, enterprise networks are facing the problems of large distribution of devices and lessadministrators, resulting in the huge cost for administrators to manually configure each device. With theautomatic configuration function, network administrators can save the configuration files on a specifiedserver and the device can automatically obtain and execute the configuration files, therefore greatlyreducing the workload of administrators.Typical Networking of Automatic ConfigurationFigure 1-1 Network diagram for automatic configurationAs shown in Figure 1-1, the device implements automatic configuration with the cooperation of a DHCPserver, TFTP server and DNS server:z DHCP server: Assigns an IP address, configure file name, TFTP server IP address, and DNSserver IP address for the device that performs automatic configuration.z TFTP server: Saves files needed in automatic configuration. A device obtains files needed from aTFTP server, for example, network intermediate file and the configuration file of the device.z DNS server: Used for IP address-to-host name resolution. A device that performs automaticconfiguration can resolve an IP address to a host name through a DNS server to get theconfiguration file with the name hostname.cfg from a TFTP server; if the device gets the domain
