42Specifying the TFTP server and boot file name for the clientTo implement client auto-configuration, you must specify the IP address or name of a TFTP server and theboot file name for the clients, and there is no need to perform any configuration on the DHCP clients.A DHCP client obtains these parameters from the DHCP server, and uses them to contact the TFTP serverto get the configuration file used for system initialization. Auto-configuration operates as follows:1. When a router starts up without loading any configuration file, it sets an active interface (such asthe interface of the default VLAN or a Layer 3 Ethernet interface) as the DHCP client to getconfiguration parameters from the DHCP server, including the IP address or name of a TFTP server,and the boot file name.2. After getting the parameters, the DHCP client sends a TFTP request to obtain the configuration filefrom the specified TFTP server for system initialization. If the client cannot get such parameters, itperforms system initialization without loading any configuration file.To configure the IP address of the TFTP server and the boot file name in a DHCP address pool:Step Command Remarks1. Enter system view. system-view N/A2. Enter DHCP address pool view. dhcp server ip-pool pool-name N/A3. Specify the IP address or thename of a TFTP server.• Specify the IP address of the TFTPserver:tftp-server ip-address ip-address• Specify the name of the TFTP server:tftp-server domain-namedomain-nameBy default, no TFTP server isspecified.4. Specify the boot file name. bootfile-name bootfile-name By default, no boot filename is specified.Specifying a server for the DHCP clientSome DHCP clients need to obtain configuration information from a server, such as a TFTP server. Youcan specify the IP address of that server. The DHCP server sends the server's IP address to DHCP clientsalong with other configuration information.To specify the IP address of a server:Step Command Remarks1. Enter system view. system-view N/A2. Enter DHCP address poolview. dhcp server ip-pool pool-name N/A3. Specify the IP address of aserver. next-server ip-address By default, no server is specified.
