NOVELL SUSE NCLP 3103课程9.pptVIP

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * In this module, * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * /etc/dhcpd.conf The configuration file for the DHCP server is /etc/dhcpd.conf. The entries in the configuration file belong to two categories: Parameter statements Declarations /etc/dhcpd.conf (continued) Starting with DHCP server version 3, dynamic updates of a DNS server are possible. If no dynamic update is done (as in this example), specify none as the parameter to this statement: # # /etc/dhcpd.conf # ddns-update-style none; /etc/dhcpd.conf (continued) The following are statements regarding the lease times (the validity period for assigned IP addresses): # # specify default and maximum lease time # default-lease-time 86400;max-lease-time 86400; /etc/dhcpd.conf (continued) The following section of dhcpd.conf shows how to provide information on the DNS domain to be used: As the last parameter, specify the addresses of routers in the subnet: # # What is the DNS domain and where is the name server? # option domain-name ; option domain-name-servers , 0; # # This is a router # option routers ; /etc/dhcpd.conf (continued) There are several options that are needed to enable booting using PXE: Define the range of addresses that can be used for assigning IP addresses to clients. allow bootp; next-server ; server-name ; filename pxelinux.0; # # Which IP addresses may be assigned to the clients? # subnet netmask { range 01 20; } /etc/dhcpd.conf (continued) In the following example, the host with the MAC address specified after “hardware ethernet” is assigned the IP address 50: # # Host specific configuration # host da150 { fixed-address 50; hardware ethernet 00:11:22:33:44:55; } /etc/dhcpd.conf (continued) To test your setup, boot a machine that has a PXE-capable network card. The machine should get an IP address from your DHCP server and briefly after that, you should see t