When you add clients with the add_install_client -d script on the install server, the script reports DHCP configuration information to standard output. You can use this information when you create the options and macros that are needed to pass network installation information to clients.
To install DHCP clients with a DHCP server over the network, you must create DHCP options. This information is needed to install the Solaris OS.
When a client sends a DHCP request, the server must have the following client information:
Client's ID, which is typically the Ethernet address
Class of the client request
Subnet the client resides on
The class macro is based on a class string that is contained in the DHCP request. On x86 based systems, the BIOS already makes a DHCP request with the class PXEClient:Arch:00000:UNDI:002001. If a macro by this name is defined in the DHCP server configuration, then the macro content is sent to the x86 based clients.
The network macro is named by the IP address of the subnet that the client resides on. If the macro 220.127.116.11 is defined on the DHPC server, the macro content is sent to all clients on that subnet. The macro content is sent, regardless of the class of the request. If an option is defined in both the class macro and the network macro, the network macro takes precedence.
The client macro is named by the client type (01 for Ethernet) and the mac address of the client, in uppercase letters. For a client with the Ethernet address 0:0:39:fc:f2:ef, the corresponding macro name is 01000039FCEF. Note the absence of colons in the client macro.
For example, for a client on the subnet 192.168.100.0, with the Ethernet address 0:0:39:fc:f2:ef, making a DHCP request of class PXEClient, the DHCP server has the following matching macro:
PXEClient BootSrvA: 192.168.100.0 BootFile: pxegrub 18.104.22.168 Router: 22.214.171.124 NISdmain: sunsoft.eng.sun.com 01000039FCEF BootFile: 01000039FCEF The actual DHCP response will be BootSrvA: 192.168.100.0 BootFile: 01000039FCEF Router: 126.96.36.199 NISdmain: sunsoft.eng.sun.com
Note that the BootFile in the client macro overrides the BootFile in the class macro.
For more detailed information, see Preconfiguring System Configuration Information With the DHCP Service (Tasks) in Solaris Express Installation Guide: Network-Based Installations.