Microsoft KB Archive/925127

= FIX: Some Advanced Program-to-Program Communications session requests are sent to an IBM host system over an IP-DLC connection in Host Integration Server =

Article ID: 925127

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Host Integration Server 2006
 * Microsoft Host Integration Server 2004 Enterprise Edition
 * Microsoft Host Integration Server 2004 Standard Edition

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SYMPTOMS
In Microsoft Host Integration Server 2006 and in Microsoft Host Integration Server 2004, you may notice that some Advanced Program-to-Program Communications (APPC) session requests are sent to an IBM host system over an IP-DLC connection. This behavior occurs even if the specified remote APPC logical unit (LU) for the APPC application or for the Common Programming Interface for Communications (CPI-C) application is not defined.

The expected behavior is that APPC session requests are sent to the IBM host system over one of the host or peer connections that have a remote APPC LU that is defined in SNA Manager.

If an APPC session request is sent over a host or peer connection to an IBM host system that does not have the specified remote APPC LU defined, the IBM host system rejects the session request and sends a BIND-RSP error response.



CAUSE
You can configure host or peer connections that use other link services so that these connections support dynamically creating remote APPC LUs. (The DLC 802.2 link service is one such service.) You can do this by enabling the Supports dynamic remote APPC LU definition option. Because this option is not available for connections that use the IP-DLC link service, the option cannot be disabled for these connections.

When the Supports dynamic remote APPC LU definition option is enabled, it lets APPC session requests be sent over a host connection even if the requested remote APPC LU is not defined for the host or peer connection.



Host Integration Server 2006
A hotfix is currently not available for Host Integration Server 2006.

Host Integration Server 2004
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Host Integration Server 2004 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Installation information
You must apply this hotfix to all the Host Integration Server 2004 systems that are in the Host Integration Server subdomain. Otherwise, you receive the following error message when you open SNA Manager on a Host Integration Server 2004 system:

Microsoft SNA

An IP-DLC connections should support dynamic APPC LU definition

When this problem occurs, SNA Manager may not display all the IP-DLC connections in the configuration. Additionally, SNA Manager may not display the correct status for resources in the Host Integration Server subdomain.

If the Host Integration Server 2004 servers will be managed by Host Integration Server 2004 clients that run SNA Manager, the Host Integration Server 2004 client version of this hotfix must be applied to the clients.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
After you apply the hotfix, the Supports dynamic remote APPC LU definition option is available for IP-DLC connections in SNA Manager. By default, this option is enabled. When this option is enabled, the default behavior for IP-DLC connections is the same as it was before the hotfix was applied.

If you want to disable the Supports dynamic remote APPC LU definition option, follow these steps:
 * 1) Click Start, click Programs, click Microsoft Host Integration Server 2004, and then click SNA Manager.
 * 2) Under Console Root, expand the subdomain and the server, and then expand the connections that you have defined in SNA Manager.
 * 3) Right-click the IP-DLC connection that you want to modify, and then click Properties.
 * 4) Click to clear the Supports dynamic remote APPC LU definition check box, and then click OK.
 * 5) On the Action menu, click Save configuration.

Note If the SNA Server service was active when you saved the configuration, you must restart the SNA Server service to have the configuration change take effect.

