Microsoft KB Archive/266250

= XFOR: Exchange 5.5 Internet Mail Service on Cluster Uses Node IP Address =

Article ID: 266250

Article Last Modified on 2/22/2007

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APPLIES TO

 Microsoft Exchange 2000 Server Standard Edition, when used with:  Microsoft Windows 2000 Standard Edition  Microsoft Exchange Server 5.5 Standard Edition, when used with:  Microsoft Windows 2000 Standard Edition

 Microsoft Windows NT 4.0 </li> Microsoft Exchange Server 5.5 Service Pack 1, when used with:  Microsoft Windows 2000 Standard Edition</li></ul>

 Microsoft Windows NT 4.0</li></ul> </li> Microsoft Exchange Server 5.5 Service Pack 2, when used with:  Microsoft Windows 2000 Standard Edition</li></ul>

 Microsoft Windows NT 4.0</li></ul> </li> Microsoft Exchange Server 5.5 Service Pack 3, when used with:  Microsoft Windows 2000 Standard Edition</li></ul>

 Microsoft Windows NT 4.0</li></ul> </li></ul>

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This article was previously published under Q266250

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SUMMARY
When the Exchange Server 5.5 Internet Mail Service is installed and configured on either a Microsoft Windows 2000 or a Microsoft Windows NT 4.0 cluster, Internet Mail Service uses the physical node Internet Protocol (IP) address instead of the Exchange-based server's virtual IP address.

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MORE INFORMATION
You can use protocol logging and a network trace to determine what occurs when a node makes an outbound connection. The protocol log reports that the connection is coming from the cluster IP, but the network trace reports that the connection is using the IP address that is bound to the network adaptor on the node. This behavior can be an issue if a firewall has been implemented. If all IP addresses except for the cluster IP are blocked, traffic from the nodes is stopped, and the Exchange-based server is not able to send and receive mail.

The Exchange 5.5 Internet Mail Service does not use cluster APIs. Socket programs can only use the virtual address when the socket programs are rewritten with cluster APIs, which are able to reference the virtual IP addresses that can be used.

For additional information, see the Cluster.doc file in the Docs\Word_docs\Clustering folder that is located on the Microsoft Exchange Server 5.5 CD-ROM.

Additional query words: cluster IMS node virtual

Keywords: kbinfo KB266250

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