TCP/IP Information
Copyright (C) 1997, 1998 by International Business Machines Corporation

DHCP Server Configuration


DHCP Server Configuration window

The DHCP Server Configuration window enables you to add, modify, delete, or view configuration information for your DHCP server. The items in the configuration are displayed in two panes:

A banner at the bottom of the window provides a brief summary of information for an item. The banner also displays status information about major operations, such as loading or saving a file.

To open a notebook to view or modify an item in the current configuration, double-click the item.

The menu bar has these choices:

File menu

Use the File pull-down menu to create or save a configuration file.

Note:

The DHCP Server Configuration program provides a default file type of dhcpsd.cfg for all configuration files.

The file menu contains:

New
Start a new configuration file.

Note:

If you click New while you are currently editing an existing configuration file, the DHCP Server Configuration program prompts you to save your current work.

Open
Opens the Open window so you can open an existing configuration file.

Load Sample
Load the sample configuration file, which contains an example of every type of configurable object. You can use the sample as a starting point for your own configuration.

Save
Save the current file, using the existing file name. The configuration remains open, available for additional changes. If this is a new file, the default file name is DHCPSD.CFG in the in the directory specified by the ETC environment variable. If the configuration file is not saved in the directory specified by the ETC environment variable, it cannot be used by the DHCP server until it is moved to the ETC directory.

Save As...
Opens the Save window so you can specify a configuration file name.

Exit
Exit the DHCP server configuration program. You are prompted to save unsaved changes.

Edit menu

Use the Edit pull-down menu to find configuration items and also to delete, cut, copy, and paste configuration items. Items on the pull-down are active or grayed, depending on the whether the action is available for the item selected in the configuration.

The edit menu contains:

Find
Opens the Find window to enable you to specify a string to find, for example, the IP address of a subnet.

Cut
Cut the selected configuration item to the clipboard, graying the item in the current view. Subordinate items are included in the cut. Pasting the cut item moves the item to the paste location.

Note:

If you cut an item and immediately cut or copy a second item without pasting the first item, the clipboard content is not discarded; the DHCP Server Configuration program returns the previously-cut item to an active state in the view.

Copy Item
Copy the selected configuration item to the clipboard. Items subordinate to the selected item are not copied.

Copy Tree
Copy to the clipboard the selected configuration item and all items defined within its scope.

Paste After
If appropriate to the target destination, paste the clipboard content at the same level, after the currently-selected item. The copied item remains on the clipboard so you can paste it again.

Paste Within
If appropriate to the target destination, paste the clipboard content as a subordinate item within the currently-selected item. For example, paste a class within a subnet. The copied item remains on the clipboard so you can paste it again.

Delete
Delete an item AND all other items defined within the scope of the item.

Attention: A delete action cannot be undone.

Configure menu

Use the Configure pull-down menu to open a notebook to add or modify configuration items. Items on the pull-down are active or grayed, depending on the whether the action is available for the item selected in the configuration. For example, because a class can be added only at a global or subnet level, Add Class is active when a global or subnet item is selected in the configuration.

Note:

Only one notebook can be open at any time.

The configure menu contains:

Modify Selected Item
Modify the currently-selected item. This is equivalent to double-clicking the item. This menu item displays the appropriate notebook for the selected configuration item.

Add Subnet
Add a subnet. Add Subnet is active if a global item is selected in the configuration.

The Subnet item specifies configuration parameters for an address pool administered by a server. An address pool is a range of IP addresses to be leased to clients.

Add Class
Add a class.

The Class item specifies configuration parameters for a user-defined group of clients that identify themselves as belonging to a named class administered by a server. Classes can be specified at global and subnet levels. For example, define a class called "fastprt" for clients that require the use of a high-speed printer.

Add Client
Add a client. The DHCP server provides a specific address, lease, and other configuration parameters, or DHCP configuration parameters only to a specific client that identifies itself to the server with an identifier such as a MAC address.

Clients can be specified at global or subnet levels.

Add Vendor Options
Add a vendor and vendor options. For more information on vendor options, see the online book DHCP Server Administration.

Add Comment
Add a comment.

Add Subnet Group
Define a group of subnets that share the same physical network. Subnet groups can be defined only at a global level.

Exclude Client
Exclude a client uniquely identified by a MAC address from service by the DHCP server. Clients can be excluded at global or subnet levels.

View menu

Use the View pull-down menu to display the configuration in a variety of ways, making it easier to navigate within large configurations to find specific items. The View pull-down enables you to quickly move between a complete view of the configuration and a subset view. For example, you can filter the configuration to display views of only subnets, subnet groups, classes, or clients.

The view menu contains:

Main View
Display all configuration items.

Expand All
Expand all branches of the main view.

Collapse All
Collapse all branches of the main view.

Subnet View
Display a list of subnets defined in the configuration.

Class View
Display a list of classes defined in the configuration.

Client View
Display a list of clients and excluded clients defined in the configuration.

Subnet Group View
Display only the subnet groups and their subordinate subnets defined in the configuration.

Option View
Display all options defined in the configuration. Click a specific option to see a cross-reference of all the items that specify or inherit the option, displayed in the details pane.

View Entire File
Display the entire (read-only) configuration file in text format. This is the same text that would be stored in a configuration file if the file were saved at this point in your work session.

View File Item with Entire Scope
For an item highlighted in the configuration, display the statement defining the item in the configuration file and any items within its scope.

View File Item Alone
For an item highlighted in the configuration, display only the statement defining the item in the configuration file.

Item on Clipboard
Display the content of the clipboard

Help menu

Use the Help pull-down menu to view help information for this program.

The help menu contains:

How Do I
Describes basic tasks to use the program

Window Help
Provides help for the DHCP Server Configuration window

Introduction
Displays the help table of contents and introduction

About
Describes the product version and copyright


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