What is a DHCP Reservation?
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.
You can configure a DHCP reservation in your DHCP server when you need to reserve a permanent IP address assignment. Use reservations for the DHCP enabled devices like print and file servers or other application servers which always have the fixed IP address on network.
A reservation is consists of the following information:
| Element | Description |
|---|---|
| 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).
- Description.
- Under supported types, select one of the following options.
- Both
- DHCP only
- BOOTP only
- In the new reservations dialog box, click add, and then click close.
Verifying the DHCP Reservation
- On the client computer, at the command prompt, using the ipconfig/release command, release the client's IP address.
- On the server computer, in the DHCP console, under address leases, verify that the reservation displays as inactive.
- On the client computer, at command prompt, using the ipconfig/renew command, renew the client's IP address.
- On the server computer, in the DHCP console, under address leases, verify that the reservation displays as active.
Client Verification
- To verify IP address of the client, you need to 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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