IP Address Management

You use the DNS/DHCP Management Utility to create and set up any IP Address objects to be assigned to specific devices or to be excluded from dynamic assignment. Create an IP Address object for each such device or address. Assigning a specific address to a client requires you to specify the client's media-access control (MAC) address or Client ID.

If you have set up subnets and subnet address ranges, you are not required to set up individual IP addresses unless you want to perform manual address assignment or exclude addresses from assignment.

The IP Address Management role consists of the following tasks:

• Creating an IP Address object
• Viewing or Modifying an IP Address Object
• Deleting an IP Address Object

Creating an IP Address object

1. Click DHCP Management > IP Address Management to open the IP Address Management window in the main panel.

2. Select Create IP Address from the drop-down menu and click OK to open the Create IP Address window.

3. From the drop-down menu, select the subnet for which the IP address will be created.

4. Enter the IP address.

5. Choose an assignment type for the IP address object. Assignment types for an IP Address object are Dynamic, Manual, and Exclusion. If the IP address is dynamically assigned by the DHCP server, it will be automatically displayed.

   Valid types that can be created manually are Manual and Exclusion. A manual assignment type must have either a MAC Type or a Client Identifier for the IP address object to be created.

   Client Identifier uniquely identifies the client.

   MAC Type specifies the MAC address type.

   MAC Address specifies the hardware address of the NIC (Network Interface Card).

6. Click Create.

   A message is displayed indicating that the new IP Address object has been created.

Viewing or Modifying an IP Address Object

1. Click DHCP Management > IP Address Management to open the IP Address Management window in the main panel.

2. Select View/Modify IP Address from the drop-down menu and click OK to open the View/Modify IP Address window.

3. Select the subnet that contains the IP address to be modified.

4. Select the IP Address.

5. Click OK.

   You are led through a set of steps by which you can modify the following IP Address object parameters:

   • Assignment Type: Specifies Exclusion or Manual IP address assignment types.

     - Exclusion: Address objects are created to identify IP addresses to be excluded from DHCP server address assignment. An Excluded assignment type designates that the IP address will not be used.

     - Manual: Address objects are created to identify an IP address to be assigned to a device. A client identifier or MAC address must be configured for the manual address so that the DHCP server can identify the appropriate client. Manual assignment types specify client identifiers, MAC types, MAC addresses, or hostname parameters.

   • Client Identifier: Uniquely identifies the client.
   • MAC Type: Specifies the MAC address type.

     - 15, Frame Relay

     - 16, Asynchronous Transfer Mode (ATM)

     - 17, HDLC

     - 18, Fibre Channel

     - 19, Asynchronous Transfer Mode (ATM)

     - 20, Serial Line

     - 21, Asynchronous Transfer Mode (ATM)

   • MAC Address: Specifies the hardware address of the NIC (Network Interface Card).
   • Host Name: Specifies the name of the host server.
   • Associated eDirectory Object: Use this field to select another object in the eDirectory database to maintain a reference to. For example, identify a user who typically uses the device associated with this address.
   • Comments: You can type comments about the address object in this box. This is an optional parameter.
   • Lease Expiration Option: A lease type can be permanent or timed. Permanent leases never expire; the client is assigned an IP address for an indefinite period. Timed leases are defined in days, hours, and minutes. Timed leases expire, unless the client renews the lease.
   • Last Used: Displays when the IP address was last used.
   • Other DHCP Options: Use this to add, delete, update, or specify default DHCP options for a manually assigned address type. Default is used to display DHCP options inherited from global preferences and the Subnet object that the address object is under.

Deleting an IP Address Object

1. Click DHCP Management > IP Address Management to open the IP Address Management window in the main panel.

2. Select Delete IP Address from the drop-down menu and click OK to open the Delete IP Address window.

   • Select the subnet that contains the IP address.
   • To remove all the IP Address objects in the list, check the top-level check box and click Delete.
   • To remove one or more IP Address objects, check the check box next to it and click Delete.