Technical data

Configuring the DHCP Server
7.5 Using DHCP GUI to Configure DHCP
2. Choose Active IP Snapshot from the drop-down list.
3. On the left side of the window, select the record you want to remove.
4. Click Delete.
Changes to the database take effect immediately.
Refreshing the Active IP Snapshot Window
To refresh the Active IP Snapshot window so that it reflects the current status of
the database, click Refresh. This parameter will refresh data on leases that are
active or expired, or both.
7.5.2.5 Preload MAC Addresses
Use the Preload MAC Addresses window to restrict the assignment of IP
addresses. To enable this security measure, set the Restrict to known MAC
addr value to True in the Server/Security Parameters window. You can then
manually assign the desired MAC addresses. The server ignores all other client
DHCP requests.
Checking the Status of a MAC Address
Each configured MAC address and type is listed on the left side of the Preload
MAC Addresses window. To see the details of a MAC address:
1. Click the Server/Security tab.
2. Choose Preload MAC Addresses from the drop-down list.
3. Select a record from the left side of the window.
The right side of the window lists the information applicable to the address.
Adding a New MAC Address
Initially, you may need to add large numbers of MAC addresses to the known
clients database; it may be more practical to use the command line utility
jdbreg
for this purpose. You would typically use the GUI to add MAC addresses when
new (trusted) clients appear on the network.
To add a new MAC address:
1. Click the Server/Security tab.
2. Choose Preload MAC Addresses from the drop-down list.
3. Choose [New Record].
4. Enter a value for each parameter.
5. Click Add.
Changes to the database take effect immediately.
Removing a MAC Address
To remove a MAC address:
1. Click the Server/Security tab.
2. Choose Preload MAC Addresses from the drop-down list.
3. Choose the MAC address you want to delete.
4. Click Delete.
Changes to the database take effect immediately.
7–34 Configuring the DHCP Server