I'm not sure what you mean by "buffer" in this context, but I *think* you're talking about trying to get a measure of how full a queue associated with a port is. If that's the case... I don't think there is anything specified in OpenFlow to help you.
-- Murphy On Jul 14, 2013, at 5:56 PM, 朱超 wrote: > sorry, my English is so poor, i have saw the port stats. from the reply, we > can know the number of transmitted/received packets(bytes) and the number of > packets dropped by RX(TX). if i want to know the buffer size of the packets > in the port, (rx_bytes- tx_bytes) is right? or (rx_packets - tx_packets - > tx_dropped - rx_dropped) is right? can you tell me the relationship between > rx_packets, tx_packets, rx_dropped and tx_dropped? Thank you very much !!! > > > 2013/7/15 Murphy McCauley <[email protected]> > On Jul 14, 2013, at 9:15 AM, 朱超 wrote: > > > Hello everyone, I got puzzled when I use POX. I want to read the buffer > > size for the packet goes through the port periodly. How can I realize it in > > POX? > > If I'm understanding you correctly, you just want to send a port stats > request to the switch periodically and then examine the reply. The stats > sections and the "Statistics Collector Example" on the POX wiki should be > helpful: > https://openflow.stanford.edu/display/ONL/POX+Wiki > > -- Murphy >
