DHCP Allocation Table

The DHCP Allocation Table window displays the following parameters:

• IP Address — This is a read-only field, displaying the IP Address allocated by the DHCP server.

• MAC Address — MAC Addresses are stored in canonical bit order to match incoming DHCP requests. To match all incoming requests from host devices centrally attached to the server, enter an all zero MAC Address.

• Mechanism — This is the mechanism used by the server to allocate IP Addresses. The DHCP server supports three mechanisms for IP allocation:

• Automatic allocation — The DHCP server selects a permanent IP Address from a predefined range when a new client requests configuration.

• Dynamic allocation — The DHCP server allocates an IP Address for a limited period, called a 'lease'. During the lease, the Address is guaranteed this allocation, and the Dynamic allocation mechanism attempts to return to the same network each time the client requests an address.

• Manual allocation — The network administrator assigns an IP Address to a client.

Note: The DHCP Address Allocation Edit option supports the Manual allocation mechanism only. Therefore, if Automatic or Dynamic allocation is defined for a particular DHCP server, its mechanism value is changed to Manual allocation after editing this server and clicking   in the Edit dialog box.

• Host Name — The host identity requesting the address.

• Application — This is a read-only field. It displays the application that allocated the IP Address. The application is either DHCP or RIP.

• Age Time — This is a read-only field, displaying the IP Address age time.

• Default Router — The default gateway IP Address.

• Configuration Server IP Address — The server address containing the TFTP configuration file to which the device relays the configuration file download request.

• Configuration File Name — The path and the configuration file name on the server.

Add DHCP Allocation Table Entry

Note: The Insert ,is available for DHCP servers with the Manual allocation mechanism only.

When the Host name is inserted in this window, it is checked against the host name requesting the address. If the name of that Host and the value entered in the Host Name field of this window is identical, the IP is granted. This option is used to enhance security.

To add a DHCP Allocation Table entry:

1. Click  . The DHCP Allocation Table Insert window is displayed.

2. Complete the table entry fields and click  . The DHCP Allocation Table window is displayed.

3. Click  . When the Status field displays “Finished!”, the entry is confirmed as created.

Edit DHCP Allocation Table Entry

To edit a DHCP Allocation Table entry:

1. Click  . The Allocation Table  Edit window is displayed.

2. Edit the required table entry fields and click  . The DHCP Allocation Table window is displayed.

3. Click  . When the Status field displays “Finished!”, the fields are confirmed as modified.

Delete DHCP Allocation Table Entry

To delete a DHCP Allocation Table entry:

1. Select the entry to delete.

2. Click  .

3. Click  . When the Status field displays “Finished!”, the entry is confirmed as deleted.