Changes between Version 10 and Version 11 of Tutorials/m0SDN/aHowTo

Timestamp:

Aug 20, 2009, 4:30:11 AM (15 years ago)

Author:

akoshibe

Comment:

—

Tutorials/m0SDN/aHowTo

@@ -117 +117 @@
 tcpdump pcap files can also be opened using wireshark - once the plugin has been installed, !OpenFlow packets can be interpreted from these files as well.  
 
-=== BWM-ng ===
-For performance testing, you may want to run some bandwidth tests. Real-time bandwidth use can be monitored using BWM-ng. By default, the tool will monitor all interfaces on the Console. To just monitor the !OpenFlow interface, you must specify `eth1.100`. To output this to a csv, use the following command: 
+=== Iperf ===
+For performance testing, you may want to run some bandwidth tests. iperf is a tool that measures maximum network performance using TCP for throughput and UDP for jitter and datagram loss. The standard image used for the Sandbox nodes when booted with command `omf tell on` comes with iperf. To take measurements, you need at least two nodes. One node becomes the server, the other(s), clients.
+
+To start the server:
+{{{
+iperf -s 
+}}}   
+and on the client:
+{{{
+iperf -c <server ip address>
+}}}
+
+iperf, however, cannot take real-time bandwidth measurements. Real-time bandwidth use can be monitored using BWM-ng.
+
+=== BWM-ng === 
+By default, the tool will monitor all interfaces on the Console. To monitor just the !OpenFlow interface, you must specify `eth1.100`. To output this to a csv, use the following command: 
 
 {{{
 bwm-ng -I eth1.100 -o csv -t 1000 -F <file-name>
 }}}  
-
-
 
 === Development ===