Print jobs time out when you send them from an AIX-based computer to a Windows Server 2003-based computer (923786)

Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry

CAUSE

This problem occurs if the timestamp option for RFC 1323 is enabled on the server that is running the LDP service. During the TCP session setup, Windows Server 2003 sets the RFC 1323 timestamp values to 0. Then, when the timestamp option is enabled, IBM AIX calculates retransmission times by using the differences between the timestamp values that are acknowledged by TCP and the 0 timestamp values. Print jobs are more likely to time-out when retransmission time values are high.

RESOLUTION

A fix is available for AIX-based computers that are experiencing this problem. You can also disable the timestamp option on the server that is running the LDP service. To resolve this problem, use one of the following methods:

Method 1: Install the fix on the IBM AIX-based computer

To do this, follow these steps:

Visit the IBM Web site that contains the fix for the version of AIX that the client computer is running.
- If the client computer is running AIX 5.3, visit the following Web site:
  http://www-1.ibm.com/support/docview.wss?uid=isg1IY65481
- If the client computer is running AIX 5.2, visit the following Web site:
  http://www-1.ibm.com/support/docview.wss?uid=isg1IY65761
- If the client computer is running AIX 5.1, visit the following Web site:
  http://www-1.ibm.com/support/docview.wss?uid=isg1IY65138
Follow the instructions on the Web site to download and install the fix.

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Method 2: Disable the timestamp option on the server that is running the LDP service

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To do this, follow these steps:

Click Start, click Run, type regedit, and then click OK.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters
Right-click Tcp1323Opts, and then click Modify.
In the Value data box, type 0 or 1, and then click OK.

Note If you want to disable all RFC 1323 options, type 0. If you want to enable Windows scaling, type 1.

MORE INFORMATION

For more information about Windows TCP features, click the following article number to view the article in the Microsoft Knowledge Base:

224829 Description of Windows 2000 and Windows Server 2003 TCP features

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