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| Sun Ethernet Fabric Operating System ### DHCP Administration Guide

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## Configure Host-Specific Options

In addition to configuring global and subnet options, you can also configure host-specific options. This configuration is used for specific hosts as a configuration parameter. See RFC 2132 for the complete list of DHCP options and their corresponding codes.

In this example, the address pool is `pool 1`, the MAC address is `00:11:22:33:44:55`, and the subnet mask option is `255.255.0.0`. This option is offered to DHCP clients with a hardware address of `00:11:22:33:44:55` even if there is a pool-specific option or global option with this option code.

1. Create the address pool.

       SEFOS# configure terminal
       SEFOS(config)# ip dhcp pool 1

2. Configure option 1 (subnet mask) and the MAC address.

       SEFOS(dhcp-config)# host hardware-type 1 client-identifier 00:11:22:33:44:55 option 1 ip 255.255.0.0
       SEFOS(dhcp-config)# end

3. View the options configured in the switch.

       SEFOS# show ip dhcp server pools

   The output in switch 1 is:

       Pool Id                         : 1
       -------------------------------------------
       Subnet                          : 12.0.0.0
       Subnet Mask                     : 255.0.0.0
       Lease time                      : 3600 secs
       Utilization threshold           : 75%
       Start Ip                        : 12.0.0.1
       End Ip                          : 12.255.255.255

       Host Options
       --------------
       Client Identifier     Hardware type     Code      Value
       00:11:22:33:44:55     1                 1         255.255.255.0

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