How to force traffic though a chosen interface in Windows 8.1?

Question

Windows 8.1 seems to be able to detect dead routes and picks up the default gateway or next best route for routing.
I have a requirement where I want traffic for specific destinations to "always" go through the Interface that I pick and if that interface is not providing a path from some reason then I want the communication to fail instead of switching to the
next best interface.
How do I achieve this? I already tried EnableICMPRedirect and DeadGWDetectDefault registry settings and disabling Auto Metric on the interface through which I want to route this traffic.
Any clues would help.
Thanks
GW

Answer 1

With PowerShell you should be able to view the applicable routes and modify them accordingly to alter this behavior:
# you can determine your adapters with
Get-NetAdapter
-IncludeHidden
# then you can see what routes are associated with what adapter interface (lets assume your wifi interface is 4 and your loopback is 1)
Get-NetRoute
-AddressFamily IPv4
# you will get your specific interface index, destination prefix, nexthop and the routemetric
# you can then set a specific route policy using:
New-NetRoute
-DestinationPrefix "200.200.200.200/32"
-InterfaceIndex 1
-RouteMetric 256
New-NetRoute
-DestinationPrefix "200.200.200.200/32"
-InterfaceIndex 4
-NextHop 10.1.1.1
-RouteMetric 0
# you can modify the configuration with:
Set-NetRoute
-DestinationPrefix "200.200.200.200/32"
-InterfaceIndex 4
-NextHop 192.168.10.1
-RouteMetric 0
# finally, you can remove the specific route or all the routes with:
Remove-NetRoute
-DestinationPrefix "200.200.200.200/32"
-InterfaceIndex 1
-Confirm:$false
Remove-NetRoute
-DestinationPrefix "200.200.200.200/32"
-Confirm:$false