I have two Archer C9 V1's 3.17.1 Build 20180125 Rel.56387n.  I'm using WDS to expand the network (root router and WDS client router).  However, the connection from the WDS router will drop after some time.  If I am actively using the connection or setup a constant ping to the root router, the connection stays active.  Is there a "Keep Alive" setting somewhere I'm missing?  Perhaps a way to set up a constant ping from the WDS router to the root router?  Anyone experience this?

Thanks!