Pool Configuration

Use the DHCP Pool Configuration page to edit pool settings or to configure additional settings for existing manual and dynamic pools. The fields that can be configured depend on the type of binding that is selected.

To access this page, click System > Advanced Configuration > DHCP Server > Pool Configuration in the navigation menu.

If you select Automatic or Manual from the Type of Binding drop-down menu, the screen refreshes and a slightly different set of fields appears.

DHCP Pool Configuration Fields

Field	Description
Pool Name	For a user with read/write permission, this field would show names of all the existing pools along with an additional option Create. When the user selects Create, another text box, Pool Name, appears where the user may enter name for the Pool to be created. For a user with read-only permission, this field would show names of the existing pools only.
Type of Binding	Specifies the type of binding for the pool. Unallocated: The addresses are not assigned to a client. Automatic: The IP address is automatically assigned to a client by the DHCP server. Manual: You statically assign an IP address to a client based on the client‘s MAC address.
Network Base Address	(Dynamic pools only) The network portion of the IP address. A DHCP client can be offered any available IP address within the defined network as long as it has not been configured as an excluded address.
Network Mask	For dynamic bindings, this field specifies the subnet mask for a DHCP address of a dynamic pool. You can enter a value in Network Mask or Prefix Length to specify the subnet mask, but do not enter a value in both fields.
Client Name	For manual bindings, this field specifies a name for the client to which the DHCP server will statically assign an IP address. This field is optional.
Hardware Address Type	For manual bindings, this field specifies the protocol of the hardware platform of the DHCP client. Valid types are ethernet and ieee802. Default value is ethernet.
Hardware Address	For manual bindings, this field specifies the MAC address of the hardware platform of the DHCP client.
Client ID	(Manual pools only) The value some DHCP clients send in the Client Identifier field of DHCP messages. This value is typically identical to the Hardware Address value. In some systems, such as Microsoft DHCP clients, the client identifier is required instead of the hardware address. If the client's DHCP request includes the client identifier, the Client ID field on the DHCP server must contain the same value, and the Hardware Address Type field must be set to the appropriate value. Otherwise, the DHCP server will not respond to the client's request.
Host IP Address	(Manual pools only) The IP address to offer the client.
Host Mask	For manual bindings, this field specifies the subnet mask to be statically assigned to a DHCP client. You can enter a value in Host Mask or Prefix Length to specify the subnet mask, but do not enter a value in both fields.
Lease Expiration	Whether the information the server provides to the client should expire. Enable: Allows the lease to expire. If you select this option, you can specify the amount of time the lease is valid in the Lease Duration field. Disable: Sets an infinite lease time. For Dynamic bindings, an infinite lease time implies a lease period of 60 days. For a Manual binding, an infinite lease period never expires.
Lease Duration	The number of Days, Hours, and Minutes the lease is valid. This field cannot be configured if the Lease Expiration is disabled.
Next Server Address	The IP address of the next server the client should contact in the boot process. For example, the client might be required to contact a TFTP server to download a new image file. To configure this field, click the Edit icon in the row. To reset the field to the default value, click the Reset icon in the row. To configure settings for one or more default routers, DNS servers, or NetBIOS servers that can be used by the client(s) in the pool, use the buttons available in the appropriate table to perform the following tasks: To add an entry to the server list, click the + (plus) button and enter the IP address of the server to add. To edit the address of a configured server, click the Edit icon associated with the entry to edit and update the address. To delete an entry from the list, click the – (minus) button associated with the entry to remove. To delete all entries from the list, click the – (minus) button in the heading row.
Default Router	Lists the IP address of each router to which the client(s) in the pool should send traffic. The default router should be in the same subnet as the client.
DNS Server	Lists the IP address of each DNS server the client(s) in the pool can contact to perform address resolution.
NetBIOS Server	Lists the IP address of each NetBIOS Windows Internet Naming Service (WINS) name server that is available for the selected pool.

After you configure values for the DHCP address pool, click Submit to create the pool and apply the changes to the system.

To delete a pool, select the pool from the Pool Name drop-down menu and click Delete.

Published October 2018prev | next

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