Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh interface ipv6 add route ?
Usage: add route [prefix=]/[interface=][[nexthop=]][[siteprefixlength=]][[metric=]][[publish=]no|age|yes][[validlifetime=]|infinite][[preferredlifetime=]|infinite][[store=]active|persistent]
prefix - Prefix for which to add a route.
interface - Interface name or index.
nexthop - Gateway address, if prefix is not on-link.
siteprefixlength - Prefix length for the entire site, if on-link.
metric - Route metric.
publish - One of the following values:
no: Not advertised in Route Advertisements
age: Advertised in Route Advertisements
with decreasing lifetimes.
yes: Advertised in Route Advertisements
with unchanging lifetimes.
validlifetime - Lifetime over which the route is valid.
The default value is infinite.
preferredlifetime - Lifetime over which the route is preferred.
The default is equal to the valid lifetime.
store - One of the following values:
active: Change only lasts until next boot.
persistent: Change is persistent (default).
Remarks: Adds a route for a given prefix. Time values can be expressed
in days, hours, minutes, and seconds; e.g. 1d2h3m4s.
When publish is set to no or age, the route will be deleted
after the end of the valid lifetime. When publish is set to
age, the Route Advertisement will contain the valid lifetime
remaining until deletion.
When publish is set to yes, the route will never be deleted,
regardless of the validlifetime value, and every Route
Advertisement will contain the (same) specified valid lifetime.
add route 3ffe::/16 "Internet" fe80::1