When you click the LAN DHCP Server button on the Add Interface window, the Edit LAN DHCP Server window will be displayed.
Select the Enable LAN DHCP Server option and fill out this window as follows to configure how DHCP leases are served to computers on the Location's LAN:
DNS Suffix: If you would like, enter a DNS suffix to be served to LAN computers by DHCP. When these computers submit a name for DNS name resolution, this DNS suffix will be appended to that name.
Serve DNS with DHCP: This option enables you to select whether or not to pass the DNS Server IP addresses with the DHCP leases. When this box is selected, the computers on your LAN will be passed the DNS server addresses that are on the Network Tab of this Location form.
Serve WINS with DHCP: This option enables you to select whether or not to pass WINS Server IP addresses with the DHCP leases. WINS is the network protocol used in Windows networking; the computer names you see in Network Neighborhood are all resolved into IP addresses, and vice versa, using WINS. When this box is checked, you must enter the IP addresses of the WINS server on your network. These are the addresses that will be passed.
Primary WINS: Enter the IP address of the primary WINS server used to resolve WINS names on your local network.
Secondary WINS: Enter the IP Address of the secondary WINS server that will be used to resolve names if the primary WINS server does not respond. You cannot enter a Secondary WINS address if you have not entered a Primary WINS entry.
Lease expires: If this box is unchecked, the leases that the DHCP server assigns to local computers will be infinite. An address will not change unless the computer reboots. However, if this box is checked, the IP addresses will be temporary assignments. You must then specify in the fields that follow the number of days, hours, and minutes that the addresses should be used. When the specified amount of time is over, the lease is renewed. A lease is also renewed when a computer reboots. The renewed lease may or may not contain the same addresses.
A DHCP Server saves you from the task of manually assigning IP addresses to computers on the Location's subnet. However, each user computer must be configured to obtain IP addresses automatically. In Windows, for example, this can be accomplished easily using the Network option in the Control Panel.
DHCP Address Ranges
When you select the Address Ranges tab in the lower half of the window, this section enables you to create the address pools that will be served by the Location.
The ranges that you create here must correspond with address ranges that are included in the Default User Group on the User Groups tab of this Location’s Location form, to ensure that these computers can participate in the application network.
To begin creating address pools, select the Add button.
On this screen that is displayed, enter the following:
Include Address Range: Select this option to indicate that the entire range you enter here will be served by DHCP.
Exclude Address Range: After defining an Included range, you can exclude certain addresses from that address pool with this option. Enter the range of IP addresses that you would like to exclude from the included range in the Start Address and End Address fields. These addresses will not be served by DHCP. Note that the address of the Corente Services Gateway is automatically excluded and does not need to be entered here.
After selecting Include or Exclude, enter the following:
Start Address: Enter the lowest value of the address range in this field.
End Address: Enter the highest value of the address range in this field. If the range you would like to create contains only one IP address, you do not have to enter anything in this field.
Select the OK button to store this pool. Select Cancel to discard your changes and close the window.
DHCP Reservations
When you select the Reservations tab in the lower half of the window, you can reserve specific IP addresses for machines on the LAN that receive their addressing from the Location's DHCP server.
To begin reserving addresses, select the Add button.
Display Name: Enter a name that will be used to identify this reservation on the App Net Manager interface.
IP Address: Enter the IP address that will be reserved by the Location's DHCP server for use by this machine only. The machine will always receive this address from the DHCP server.
Reserved: When this checkbox is selected, the IP address you entered will be saved and assigned to the machine whenever it receives its addressing via the Location's DHCP server.
MAC Address: If this field is not already filled in, enter the MAC address of the machine for which the reservation is being made. This is how the DHCP server will identify the machine that will receive the reserved IP address.
NetBIOS Name: If the Location has received information from the backend about the machine for which you are reserving an address, this field will display the Net BIOS name of the machine. This field will not accept manual input.
Select the OK button to store this reservation. Select Cancel to discard your changes and close the window.
The Location may receive MAC address information from the backend about clients on the LAN. In that case, those machines will be listed on the table on the right side of the App Net Manager interface when you open the Location in the domain directory, open the Network Interfaces entry, open LAN DHCP Server or RAS Client DHCP Server, and click DHCP Reservations.
Double click any entry in this table and the Edit DHCP Reservation dialog box will be displayed for that machine. Click the Reserved checkbox for this machine to ensure that the machine is served the IP address that you enter on this dialog box every time it receives addressing information from the gateway’s DHCP server.
DHCP Options
When you select the Options tab in the lower half of the window, you can include DHCP options that will be delivered along with addressing information by the Location's DHCP server. These options will be delivered to every device on the LAN that receives its addressing information via DHCP. The receiving device itself will determine whether or not it will use the option string. A typical use for option strings is for configuring handsets for IP telephony.
To begin reserving addresses, select the Add button.
Option Number: Enter the option number that defines this option.
Option String: Enter the string for this option. Only text string options are supported by Corente Cloud Services Exchange. Select the OK button to store this option. Select Cancel to discard your changes and close the window.