I didn't make any conclusion. I just stated whatever I have experienced and as I mentioned before since by removing the wireless interfaces from the bridge, there is no rate limitation problem, then (at least) OVS plays a role in this problem. Ben: may I know what do you suggest to deal with this problem?
On Fri, Dec 8, 2017 at 7:44 PM, Ben Pfaff <b...@ovn.org> wrote: > It seems like you're just jumping to conclusions here. What have you > done to understand the situation? > > On Fri, Dec 08, 2017 at 05:59:57PM -0800, Dawood Sajjadi wrote: > > when I remove the wireless interfaces from the bridge, there is no > problem. > > However, as soon as adding the wireless interfaces to the bridge, the > > problem shows up. So, it seems OVS (at least) is a part of the problem. > > > > On Fri, Dec 8, 2017 at 5:55 PM, Ben Pfaff <b...@ovn.org> wrote: > > > > > On December 8, 2017 5:53:44 PM PST, Dawood Sajjadi < > s.d.sajj...@gmail.com> > > > wrote: > > >> > > >> I created a bridge using OVS 2.8.1 in Ubuntu 14.04. The bridge > contains 4 > > >> physical ports including one ethernet and three wireless ports. The > > >> ethernet port is connected to a laptop that generated dummy traffic > using > > >> Iperf. So, the ethernet port is used as the incoming port and the > generated > > >> traffic leaves the bridge through the wireless (as the outgoing) > ports. I > > >> used tcpdump to capture the traffic at the incoming and outgoing > ports of > > >> the bridge and I noticed that the volume of the outgoing traffic (at > the > > >> wireless ports) is by far lower than the amount of the incoming > traffic > > >> (from the ethernet port). It seems the OVS bridge drops/limits the > rate of > > >> outgoing packets. For instance, if the size of the captured traffic > using > > >> tcpdump at eth0 is 15 MB, the total size of the captured traffic on > > >> wireless ports is 3 MB! > > >> > > >> I didn't make any change in the default configuration of the OVS. > Also, > > >> to ensure that there is no predefined Queue/QoS policy at the bridge, > I > > >> used "ovs-vsctl --all destroy qos && ovs-vsctl --all destroy queue" > > >> command. However, the problem persists! Has anyone encountered such an > > >> issue before? I really appreciate having your feedback. Thanks. > > >> > > > > > > OVS doesn't change data rates. You should try to figure out what's > going > > > on without making that assumption. > > > >
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