TCP and UDP Test Configurations

In this page the used test configurations are specified. An overview of the measurement results, executed at the Netherlight Lambda, will be given in the next page. will be given in the next page. The measurement configurations are listed below. The test results are classified and presented in the order of these configuration items.

1. Traffic Type.
   These network tests consist of TCP and UDP bulk transfer tests using the Iperf or Netperf tools and the results that were obtained from the UDPmon tool, such as UDP bandwidth and the # packets lost.
2. Network equipment configuration / hardware.
   The tests are also differentiated to the provider of the Lambda between Amsterdam and Chicago and to the version of the hardware used. This leads to the following classification:
   • Teleglobe before an update of the Cisco ONS15454.
   • Teleglobe after an update of the Cisco ONS15454.
   • Level(3) who was the successor of Teleglobe in supplying the Lambda.
3. Routes.
   The measurements are also presented according to the followed route and possible settings connected with that. Basically there are two routes involved:
   • SARA, Amsterdam - EVL, Chicago.
   • SARA - EVL - SARA. To be able to create this route the hosts at SARA are spread over two VLAN's.
   For some tests the hosts at SARA have been replaced by hosts at NIKHEF, Amsterdam.
4. Host hardware /OS version.
   In general the following host setups have been used during these tests:
   • Linux 2.2.15 with 128 Mbyte memory.
   • Linux 2.2.15 with 512 Mbyte memory.
   • Linux 2.4.16web100 with 512 Mbyte memory.
   In some occasions also hosts running FreeBSD have been used.