Hi guys, I have a problem that the traffic is very low between two VMs. please see the image of the topology below:
[image: Inline image 1] 1) VM-1 and VM-2 can ping each other. 2) Run netserver on VM-1, and run netperf on VM-2. the report is 0.00 3) If use a cable directly connect the eth1 on the two hosts. the report of netperf still is 0.00 4) If remove the tag 100 on ovs br0 for VM-1 and VM-2, then the netperf report is 274M/s 5) Test network speed between VM-2 and VM-3 is fast, about 400M/s 6) ifconfig eth1: RX packets:7774164 errors:338805 dropped:0 overruns:0 frame:338805 TX packets:12085635 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 7) i try to run the following command: # ethtool --offload eth1 rx off tx off # ethtool -K eth1 gso off # ethtool --offload br0 rx off tx off (Operation not supported) # ethtool -K br0 gso off But it still doesn't work. I use the openvswitch 1.7.1, centos6.0, eth1 driver igb version 2.1.0-k2 fireware-version 1.5-9 So my question is why the network speed is slow when use vlan in OVS? Any advice is welcome. Thanks in advance, Kris
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