Hello,
I am a university student and a newbie of Ryu.
I am trying to send Ethernet packets with a timestamp on them to monitor
latency, but it doesn't work.
I wrote the description shown below, but could not get the payload.
I could not understand it even after reading the text, so I would like
to know more about it.
req = parser.OFPFlowStatsRequest(datapath)
datapath.send_msg(req)
req = parser.OFPPortStatsRequest(datapath, 0, ofproto.OFPP_
ANY)
datapath.send_msg(req)
pkt = packet.Packet()
pkt.add_protocol(ethernet.ethernet(ethertype=0x5577,
dst='00:01:00:00:00:01',
src='00:01:00:00:00:02'))
pkt.data = int(time.time()*1000 - start_time)
pkt.serialize()
actions = [parser.OFPActionOutput(port=2)]
out = parser.OFPPacketOut(datapath=datapath,
buffer_id=ofproto.OFP_NO_BUFFER,
in_port=ofproto.OFPP_CONTROLLER,
actions=actions,
data=pkt.data)
datapath.send_msg(out)
self.logger.info("packet-out %s" % (pkt,))
Regards,
Hideya Masaki
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