We are recently confirmed the switch itself has some bug, it cant
collect byte statistics. Thanks all.

On Thu, Dec 10, 2009 at 6:02 PM, Guanyao Huang <[email protected]> wrote:
> Hello
> Sorry to bother others. I one question regarding querying flow
> statistics from switches through struct ofp_stats_request. I am using
> nox 5.0
>
> In my topology I periodically ping between hosts. However, I find the
> packet_count and byte_count from the switch are always 0. I am
> confirmed that I successfully received ofp_flow_stats from the desired
> switch. The central controller maintains flow information and I query
> flows with desired nw_proto, nw_src, nw_dst, tp_src, tp_dst, and
> in_port. Other fields I use wildcard.
>
> When I use tcpreplay to replay some big packets, I find that the
> returned size are not always 0. However, flows in pcap file expire
> quickly and it is not easy to debug.
>
> Is it true that the returned size will always be 0 if the packet is small?
>

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