DNS/DHCP Management Console

Manage Subnet

The Subnet object is the most fundamental DHCP object. It enables you to distribute IP addresses and DHCP options to each network. The Subnet object acts as a container object for the host and pool objects.

A Subnet object's specific DHCP options and configuration parameters apply to the entire subnet and override global options.

To create a Subnet:

  1. Select the Service or Shared Network where you want to create the subnet from
    the tree view in the left frame of the Java Management Console utility.
  2. Click Create on the toolbar.
  3. Select Subnet from the list in the dialog box, then click OK.
  4. Enter a unique Subnet Address and Subnet Mask in the field provided.
  5. Click Create.

General

Select a zone from the drop-down list. The specified zone will be updated when an IP address from this subnet is leased out or when the lease expires.

You can record comments about the subnet object you are modifying.

Lease

Lease Type

Specifies the length of time for an address assignment. A lease type can be either 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, or minutes. Timed leases expire, unless the client renews the lease.

Boot Parameter Options

Select this option to specify the server address, server name, and boot file name for the BOOTP service. This is the address and name of a server the client can contact for a boot image, as well as a boot file name.  If the Boot Parameter option is selected, you need to specify all the boot parameters.

Settings

These settings are used to define configuration settings for a subnet.

To add/modify a setting:

  1. Click Modify.
  2. Select a setting from the list.
  3. Specify a setting value.
  4. Click OK.

To delete settings:

Configured Options

You can define values for the predefined options that are declared in the Available Option list.

For example, Time Offset is a predefined option in the Available Option list. Use the Configured Options task, to set a value for the Time Offset option.

To add a configured option:

  1. Click Modify.
  2. Select an option name from the list.
  3. Click Add.
  4. Specify an option value.
  5. Click OK.

To delete a configured option:

To modify a configured option:

  1. Select an option.
  2. Click Modify.
  3. Specify an option value.

A list of options and their definitions are available in the Novell DNS/DHCP Services Administration Guide.


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