On Wed, Dec 28, 2011 at 01:52:49PM +0800, Liang Liang wrote:
> I have one question regarding ovs-dpctl :
> NOX sets some flows with output actions to vswitch and expiration time is
> 500 seconds. I use ovs-dpctl to dump flows. Everything is fine, but several
> seconds later no flow output is shown. To my surprise, when i continue to
> send data out in VM, it succeeded and vswitch did not send packet in, which
> could demonstrate the flow does not expire. But ovs-dpctl shows 0 flow....
> 
> does anyone know how to solve this? thank you.

There's nothing to solve.

The kernel flow table is used only as a cache for active flows.  Flows
that aren't active are dropped from the kernel flow table to save
memory.

If you want to get OpenFlow flow information, use ovs-ofctl instead of
ovs-dpctl.
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