PPTP Performance Problems After Applying SP4

ID: Q231965

The information in this article applies to:

Microsoft Windows NT Server versions 4.0, 4.0 SP4
Microsoft Windows NT Server, Enterprise Edition versions 4.0, 4.0 SP4

SYMPTOMS

Clients may experience slow performance and delays with PPTP after they apply Windows NT 4.0 Service Pack 4 (SP4).

CAUSE

This problem occurs because, in order to increase performance, flow control was altered in SP4. This enhancement exposed a previously undiscovered bottleneck.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:

http://www.microsoft.com/Windows/ServicePacks/

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

This fix should be applied to the PPTP client and server.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was first corrected in Windows NT 4.0 Service Pack 6.

Additional query words: pptp performance RRAS

Keywords : kbbug4.00 kbfix4.00
Version : winnt:4.0,4.0 SP4
Platform : winnt
Issue type : kbbug