Microsoft Windows [Version 6.1.7000] (C) Copyright 2009 Microsoft Corp. C:\Windows>netsh ras ipv6 set routeradvertise ?
Usage: set routeradvertise [mode= ] ENABLE|DISABLE
Parameters:
mode - Specifies the mode for routeradvertise option
on this server.
ENABLE - Enable the routeradvertise option
DISABLE - Disable the routeradvertisement option
Remarks: A default route is a route for the zero-length prefix
A computer that is being used as an IPv6 router will not
advertise itself as a default router unless it is configured
with a default route (::/0) that is configured to be published.