On 3/12/2013 1:57 AM, Ben Pfaff wrote: > On Mon, Mar 11, 2013 at 12:17:52PM +0800, sparveriu...@gmail.com wrote: >> I was trying to set up multiple controllers in OVS. According to the >> ovs-vswitchd.conf.db document, if I add another primary controller to >> supplement an existing primary controller, or removing only one of the >> two primary controllers, it should have no effect on the flow table. >> However, it seems that whenever I terminate one of the two connections >> between OVS and my two controllers and reconnect again, the flow table >> would always be cleared. Is there any way to prevent this from happening? > > Either you are encountering a bug, or you do not understand how to > change the controllers without clearing the flow table. The latter > seems more likely. How are you changing the controllers? > Hi Ben,
Thanks for the reply, my scenario looks like this. [1] Use "ovs-vsctl" to set OVS fail-mode to secure mode. [2] Controller A connects to OVS. [3] Controller B connects to OVS. [4] Controller A sends a OFP_FLOW_MOD packet to OVS to insert a flow entry on the flow table, also verified with "ovs-ofctl dump-flows". e.g. ( cookie=0x0, duration=1.169s, table=0, n_packets=0, n_bytes=0, in_port=1 actions=output:2 ) [5] Controller A disconnects from OVS. The flow entry still remains on the flow table. [6] Controller A connects again to OVS. This time all the flow entries are cleared from the flow table. The same scenario also occurs when disconnecting and reconnecting Controller B instead. (For reference, both controllers are POX) _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
