Hi, My name is Da Yu. I'm building a prototype in Mininet. Now, I have trouble in measuring performance with Iperf.
My Mininet Version: >sudo mn --version 2.1.0 My OVS Version: >ovs-vswitchd --version ovs-vswitchd (Open vSwitch) 2.5.0 Compiled Apr 21 2016 16:52:42 Here is my topology: h1(eth0)-----(port1)s1(port2)-----(port2)s2(port1)----(eth0)h2 I created this topology by: > sudo mn --topo linear,2 --mac --controller remote --switch ovsk,protocols=OpenFlow13 I added 4 forwarding rules. H1 will push an MPLS label on each packet and h2 will pop this label. > sudo ovs-ofctl add-flow s1 in_port=1,eth_type=0x0800,action=push_mpls:0x8847,set_field:102-\>mpls_label,output:2 -O OpenFlow13 > sudo ovs-ofctl add-flow s1 in_port=2,action=output:1 > sudo ovs-ofctl add-flow s2 in_port=2,eth_type=0x8847,mpls_label=102,action=pop_mpls:0x0800,output:1 -O OpenFlow13 > sudo ovs-ofctl add-flow s2 in_port=1,action=output:2 After set static ARP for h1 and h2, I can ping these two hosts. mininet> pingall *** Ping: testing ping reachability h1 -> h2 h2 -> h1 *** Results: 0% dropped (2/2 received) Then, I ran iperf to measure the performance. But I can only get information and Iperf freezes (no reports). On h1: > iperf -c 10.0.0.2 ------------------------------------------------------------ Client connecting to 10.0.0.2, TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 10.0.0.1 port 52385 connected with 10.0.0.2 port 5001 On h2: >iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 5] local 10.0.0.2 port 5001 connected with 10.0.0.1 port 52385 I check the flow tables of these two switches. Rules are correctly installed but it seems no packets are sent for iperf. >sudo ovs-ofctl dump-flows s1 -O OpenFlow13 OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=485.599s, table=0, n_packets=76, n_bytes=62968, ip,in_port=1 actions=push_mpls:0x8847,set_field:102->mpls_label,output:2 cookie=0x0, duration=485.584s, table=0, n_packets=138, n_bytes=25635, reset_counts in_port=2 actions=output:1 > sudo ovs-ofctl dump-flows s2 -O OpenFlow13 OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=461.520s, table=0, n_packets=14, n_bytes=1212, mpls,in_port=2,mpls_label=102 actions=pop_mpls:0x0800,output:1 cookie=0x0, duration=461.509s, table=0, n_packets=12, n_bytes=956, reset_counts in_port=1 actions=output:2 Can somebody help me to point out whether there's something wrong with my setup? Or this is a known issue with OVS/Mininet? Thanks, Da
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