Defining Excluded Nodes

The DHCP server assigns IP addresses to all workstations that broadcast a DHCP request unless directed otherwise. If there are nodes on your network that you do not want to receive IP address assignments, you must add the nodes to the excluded nodes list. The DHCP server will not send a DHCP reply to any workstation that is listed on the excluded nodes list.


Gathering Necessary Information

You use the Excluded Nodes option from DHCPCFG's Configuration Menu to set up a list of workstations that you do not want the DHCP server to respond to.

To exclude a node, you need to know the physical (MAC) address of the workstation. You can also exclude a group of nodes by using the wildcard character in place of the node portion of the MAC address. NetWare DHCP accepts the asterisk (*) as a wildcard character.

For example, to exclude all nodes using a particular type of network board, you would enter the manufacturer ID portion of the MAC address and replace the node portion of the address with an asterisk (*).


Creating an Excluded Node Entry

  1. Start the DHCPCFG utility by typing the following command at the server console prompt:

    load dhcpcfg <Enter>

  2. From DHCPCFG's Configuration Menu, choose the following:

    Excluded Nodes

  3. From the list of excluded nodes, press <Insert> .

  4. When prompted, enter the physical address of the excluded workstation or a wildcard version of the physical address for a group of workstations.

    For Ethernet and token ring networks, enter the physical address as six hexadecimal bytes separated by colons. For ARCnet networks, enter the physical address as one hexadecimal byte.

  5. Enter a comment indicating why the workstation is excluded.

  6. To return to DHCPCFG's Configuration Menu, press <Esc> .