Microsoft KB Archive/280482

= Delays Occur When Establishing Point-to-Point Tunneling Protocol Connection with a Connection Manager Administration Kit Profile =

Article ID: 280482

Article Last Modified on 1/25/2006

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows Advanced Server, Limited Edition

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This article was previously published under Q280482





SYMPTOMS
When you attempt to establish for the first time a Point-to-Point Tunneling Protocol (PPTP) connection by means of a Connection Manager profile, you may experience a significant delay before you are able to connect, or you may be unable to connect.



CAUSE
This behavior may occur because of the default behavior of a Connection Manager Administration Kit (CMAK) profile which attempts to establish a tunnel (a connection) using Layer 2 Tunneling Protocol (L2TP) before it attempts to use PPTP. If the virtual private networking (VPN) server is unable to accept L2TP connections, the attempted connection can time out. At this point, the connection can fail over and attempt to connect by means of PPTP.



RESOLUTION
To resolve this behavior, you must configure the tunneling protocol that is used to establish the connection. The VPNStrategy key must be added to the .cms file.

The VPNStrategy key must be placed under the Networking& section of the .cms file, where   is the value of the   key in the Connection Manager section of the file.

The following values for the VPNStrategy key are:

0 = Automatically select the primary protocol

1 = Use Point-to-Point Tunneling Protocol (PPTP) only

2 = Try PPTP first

3 = Use L2TP only

4 = Try L2TP first

The following value is an example of the preceding key:

Networking&CorpNet Tunnel

VPNStrategy=1



MORE INFORMATION
For a full list of keys and values for Connection Manager, read the CMAK Online Help file.

Additional query words: cmak delay pptp vpn tunnel

Keywords: kbenv kbnetwork kbprb KB280482

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