A DHCP reservation is a permanent IP address assignment. It is a specific IP address within a DHCP scope that is permanently reserved for leased use to a specific DHCP client.
Users can configure a DHCP reservation in their DHCP server when they need to reserve a permanent IP address assignment. Reservations are used for DHCP enabled devices like print and file servers or other application servers that always have the fixed IP address on the network.
A reservation consists of the following information:
|Reservation name||Name that the administrator assigns|
|IP Address||IP address from the scope for the client|
|MAC Address||Client’s Media Access Control (MAC) address|
|Description||Description that the administrator assigns|
|Supported||DHCP reservation, Boot Protocol (BOOTP), or both|
Working with DHCP Reservations in the Microsoft DHCP Server
Configuring a DHCP Reservation
- Open the DHCP console.
- In the console tree, click reservations.
- On the action menu, click new reservation.
- In the new reservation dialog box, provide the values for the following fields:
- Reservation name.
- IP address.
- MAC address (without hyphens).
- Under supported types, select one of the following options:
- DHCP only
- BOOTP only
- In the new reservations dialog box, click add then close.
Verifying the DHCP Reservation
- On the client computer, release the client’s IP address at the command prompt with the ipconfig/release command.
- On the server computer, in the DHCP console under address leases, verify that the reservation displays as inactive.
- On the client computer, renew the client’s IP address at command prompt with the ipconfig/renew command.
- On the server computer, in the DHCP console under address leases, verify that the reservation displays as active.
- To verify the client’s IP address, set obtain IP address automatically from TCP/IP properties.
- Use the ipconfig/all command. Verify that the DHCP server IP address for the partner network connection is the IP address of the DHCP server’s partner network connection.
- Use the ipconfig/release command to release the IP address from the DHCP server.
- Use the ipconfig/renew command to renew the IP address from DHCP server.
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