Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh interface ipv6 set state ?
Usage: set state [[6over4=](enabled|disabled|default)][[v4compat=](enabled|disabled|default)]
Parameters:
Tag Value
6over4 - Whether 6over4 interfaces are created.
v4compat - Whether V4-compatible addresses are enabled.
Remarks: Enables or disables various types of deprecated functionality.
The default value of all parameters is disabled.
Examples:
set state default default
set state 6over4=disabled v4compat=enabled