Microsoft KB Archive/831635

= The Exchange 2000 message services that are running on a Windows 2000-based computer cannot connect to the Exchange routing service on the local computer =

PSS ID Number: 831635

Article Last Modified on 2/19/2004

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The information in this article applies to:

 Microsoft Exchange 2000 Server, when used with:  Microsoft Windows 2000 Datacenter Server

 Microsoft Windows 2000 Advanced Server

 Microsoft Windows 2000 Server 

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SYMPTOMS
When you use Microsoft Exchange 2000 Server on a Microsoft Windows 2000-based computer, the Exchange 2000 message services cannot connect to the Exchange Routing service (also known as RESVC) on the local Exchange 2000 computer. Additionally, the Exchange 2000 winsock2 connect interface may return the following error message:

10060 connection timed out.

This behavior may occur with the following message services:
 * Simple Mail Transfer Protocol (SMTP)
 * Message transfer agent (MTA)
 * Winmgmt

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CAUSE
This behavior occurs if you set the subnet mask on the host computer to 255.255.255.255. When you set the subnet mask to 255.255.255.255, the source address is not valid when a loop back packet is processed on the receive side. Therefore, the Exchange 2000 message services cannot connect to the Exchange Routing service on the local computer.

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WORKAROUND
To work around this behavior, make sure that the subnet mask on the Exchange 2000 computer is valid.

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STATUS
This behavior is by design.

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MORE INFORMATION
The Exchange 2000 Routing service has a reserved port number of 691. All routing information between servers in a routing group is sent over this port.

Additional query words: XCON, XCCC

Keywords: kbprb KB831635

Technology: kbExchange2000Search kbExchange2000Serv kbExchange2000ServSearch kbExchangeSearch kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000DataServ kbwin2000DataServSearch kbwin2000Search kbwin2000Serv kbwin2000ServSearch kbWinAdvServSearch kbWinDataServSearch

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