Event ID 1029 — DHCP Lease Issuance

Applies To: Windows Server 2008

Internet Protocol (IP) addresses are leased by the Dynamic Host Configuration Protocol (DHCP) server to its clients. Each lease has an expiration date, which the client must renew if it is going to continue to use that IP address. If conflict detection is enabled, the DHCP server pings the client before assigning the IP address to determine whether an IP address is already in use on the network.

If the DHCP client cannot be pinged by the server, the server assumes no IP address conflict and assigns the IP address to the client.

Event Details

Resolve

Reconfigure reservations or exclusion ranges

This condition should resolve itself, but if it persists, you can reconfigure reservations or exclusion ranges on the DHCP server.

Reconfigure client reservations

Client reservations allow you to reserve an IP address for permanent use by a DHCP client. Typically, reservations are used if the client has an IP address that was assigned by using another method for TCP/IP configuration.

Reservation IP addresses cannot be modified. If you want to change the IP address of a reservation, delete the reservation, and then re-create it with the new IP address.

To perform these procedures, you must be a member of the Administrators group, or you must have been delegated the appropriate authority.

To delete the reservation and then re-create it with the new IP address:

1. At the DHCP server computer, click Start, point to Administrative Tools, and then click DHCP.
2. In the DHCP console tree, click Reservations.
3. In the details pane, select the reserved client for which you want to change the IP address.
4. To delete the current reservation, on the Action menu, click Delete.
5. Add a new reservation in DHCP that uses the new IP address for the client.

Reconfigure exclusion ranges

To perform these procedures, you must be a member of the Administrators group, or you must have been delegated the appropriate authority.

To prevent address conflicts, the scopes that you define must exclude the IP addresses of devices that you statically configure, such as DHCP servers. By setting exclusion ranges, an administrator can set aside IP address ranges within a scope so that those addresses are not offered to DHCP clients. When you create a new scope, immediately exclude IP addresses of the existing, statically-configured computers. Excluded IP addresses can be active on your network, but only when these addresses are manually configured or distributed as reserved IP addresses:

1. At the DHCP server computer, click Start, point to Administrative Tools, and then click DHCP.
2. In the DHCP console tree, expand the scope you want to configure.
3. Select and right-click Address Pool under the appropriate scope.
4. Select New Exclusion Range.
5. In the Add Exclusion dialog box, type the starting and ending IP addresses of the exclusion range, and then click Add.

Verify

To perform these procedures, you must be a member of the Administrators group, or you must have been delegated the appropriate authority.

To verify that clients are getting leased addresses from the DHCP server:

1. At the DHCP-enabled client computer, click Start, click Run, and then type cmd.
2. To verify the lease of the client with a DHCP server, type ipconfig /all to view lease-status information.
3. If the client has a validly leased IP address, the ipconfig /all command displays a date and time for Lease Obtained and Lease Expires.

Related Management Information

DHCP Lease Issuance

DHCP Infrastructure