[Adding back the discuss@ mailing list.] The "bond_mode" determines how traffic is balanced across interfaces. The ovs-vswitchd.conf.db (5) man page contains a lot more information about how bonding works and can be configured.
--Justin On Apr 6, 2012, at 4:31 AM, Folay_Chen wrote: > Thanks for your reply!! You are right!! > I created multiple iperf flows, some of them did use one link and the > others did use another link!! But I can only feel this by creating > enough flows. If just 2 flows were created, they usually just shared the > same link, that is, the first couple of flows will be compressed into a > single link while another link being kept idle (Ideally, the second flow > should be immediately allocated to the idle link to achieve balance). I > don't know the timing, when will OVS allocate a flow to another link? > > OVS can't distribute packets of the same flow to different interfaces. > OVS can't really achieve balance/fairness between flows. > OVS can't dynamically switch a flow between different interfaces on the > fly based on the bandwidth utilization. > > So it means the LACP implemented in OVS is not mature? > Or it's just the nature of LACP? It needs extra QoS scheme to achieve > real balance and full bandwidth utilization? > > PS: One interesting thing: > > In the very first sec (0.0~1.0sec), a flow can actually use the full > bandwidth (20Mbps)!! And degraded to a single link bandwidth afterward > (10Mbps)... > > On Fri, 2012-04-06 at 01:46 -0700, Justin Pettit wrote: >> On Apr 6, 2012, at 12:45 AM, Folay_Chen wrote: >> >>> Once again, I test the bandwidth, the speed stays at 10Mbps... >>> I expected that the speed should be doubled: 20Mbps. >>> Any ideas? >> >> Are you just doing a single iperf flow? I'm not an export on LACP, but I >> suspect a single flow will only use one of the interfaces, since at best it >> can hash on L4 ports (i.e., it won't spread a single flow across multiple >> links). Does it work as you expect if you run multiple iperf clients? >> >> --Justin >> >> > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
