NoteHKLM\SYSTEM\CurrentControlSet\Control\Class\(Network adapters) {4D36E972-E325-11CE-BFC1-08002BE10318}\WAN Miniport (L2TP) <Device-number (000n)>
Specifies the suggested value for the maximum number of payload messages that can be held in the local receive window. The number of messages held determines the size of the window.
The value of this entry is sent to a peer in a Receive Window Attribute-Value Pair (AVP) message during call negotiation. This value is only a guideline; the driver does not enforce the value.
If the value of this entry is 0x0, the system does not control the flow of payload messages.
Note
Windows 2000 does not add this entry to the registry. You can add it by editing the registry or by using a program that edits the registry.