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Bad_address entry on a DHCP Server

Symptoms: A "bad_address" entry may be generated on a DHCP server.

Causes: 1. You have one multihomed DHCP client and one DHCP server. Both network adaptors on the DHCP client and the network adaptor on the DHCP server are connected to the same segment.

2. There may be two DHCP servers are present on the network and DHCP Duplicate IP Detection is marking the IP address as Bad_Address when the response is "host unreachable"

3. The router has ARP cache enabled.

4. The router has the BOOTP relay agent enabled.

Resolutions: 1. Make sure you have only one DHCP in the network.

2. Make sure the DHCP server is not running on a multihomed computer.

3. Check the router settings.

4. To resolve this problem, obtain the latest service pack or hotfix. Multihomed DHCP clients may cause "bad_address" entry on a DHCP Server in Windows 2000 - http://support.microsoft.com/kb/325919

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