[pox-dev] Requesting port statistics (problem with connection)

[Tmusic]

Hi,

I'm trying to query the switches for port statistics, but I experience some
problems with the connections to the switches.


#Ask switches for their port stats periodically (ignore the arg, it was for
testing the Timer function)
def periodic_event(arg):
    print 'timer_event:',arg
    Timer(5, periodic_event, args = ['Requesting stats'])
    topology = core.components['topology']
    for switch in topology.getEntitiesOfType(Switch):
        msg=of.ofp_port_stats_request()
        switch.send(msg)
        print 'request send'

def _handle_port_stats(event):
    print 'port statistics message received'

I get no stats and following output (one switch connected in mininet):

timer_event: Requesting stats
INFO:openflow.of_01:[Con 1/1] closing connection
request send
INFO:openflow.of_01:[Con 2/1] Connected to 00-00-00-00-00-01
WARNING:openflow.topology:Switch 00-00-00-00-00-01 connected, but... it's
already connected!
INFO:openflow.topology:Switch 00-00-00-00-00-01 connected
timer_event: Requesting stats
INFO:openflow.of_01:[Con 2/1] closing connection
request send
INFO:openflow.of_01:[Con 3/1] Connected to 00-00-00-00-00-01
WARNING:openflow.topology:Switch 00-00-00-00-00-01 connected, but... it's
already connected!
INFO:openflow.topology:Switch 00-00-00-00-00-01 connected

Any ideas?

Thank you in advance,

Tim
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