On Apr 28, 2013, at 3:42 AM, david zhang <ccie20...@gmail.com> wrote:
> Recently, we have built a script to monitor the size of OVS flow table. We > found the number of flow entries in flow table jumps up and down between 1500 > and 7000 in one OVS. So we want to understand more about the flow table. > > Below is my first 2 questions. Could you please help? Thank you very much! > > (1) How the flow table is built initially if we have not manually add any > entry in OVSflow table entry; > (According to my understanding, the new flow entry will be added/created when > the first packet of the flow is coming in; is it correct?) I assume your question is about the kernel flow table, as you'd see in "ovs-dpctl dump-flows". If so, you are correct. > (2) What the flow table entry update and timeout mechanism is? How I know > individual flow entry's timeout? ovs-vswitchd determines how long the flow should stay in the kernel flow table. By default, it expires a flow after five seconds of inactivity. It can be more aggressive if the flow table becomes large. --Justin _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
