Daily Archives: November 17, 2010


Reservations are deleted incorrectly from a DHCP server that is running Windows Server 2008 R2

Consider the following scenarios:

  • Scenario 1
    • You have two DHCP servers that are running Windows Server 2008 R2.
    • You set up a split-scope configuration on both DHCP servers.
    • You make identical reservations on both DHCP servers.
    • A DHCP client that reserves an IP address broadcasts a DISCOVER packet and both DHCP servers respond to the DISCOVER packet by sending an OFFER packet.
    • The DHCP client receives a reserved IP address from one of the DHCP servers.

    In this scenario, reservations on the other DHCP server are deleted incorrectly. Therefore, the reserved IP addresses may not be assigned to DHCP clients that reserve the addresses.

  • Scenario 2
    • You have a DHCP server that is running Windows Server 2008 R2.
    • You create reservations for DHCP clients on this DHCP server.
    • The DHCP client releases the obtained IP address multiple times.

    In this scenario, reservations on the DHCP server are deleted incorrectly. Therefore, the reserved IP addresses may not be assigned to DHCP clients that reserve the addresses.

http://support.microsoft.com/kb/981776