Haven't yet figured out how to "push a flow entry".

As evidenced by: when I run

   $ sudo mn --topo single,3 --mac --switch ovsk --controller remote

then type "pingall", I see

    *** Ping: testing ping reachability
    h1 -> X X
    h2 -> X X
    h3 -> X X
    *** Results: 100% dropped (6/6 lost)
    mininet>

... whereas if it were working, I'd see something more like

    mininet> pingall
    *** Ping: testing ping reachability
    h1 -> h2 h3
    h2 -> h1 h3
    h3 -> h1 h2
    *** Results: 0% dropped (0/6 lost)
Some thots about toks