PerfSONAR Server

PNWGP’s iperf server has been upgraded to a PerfSONAR node. PerfSONAR is a collaboration between R&E networks, including Internet2, ESnet, Geant, and RNP, that aims to create a mesh of nodes to measure network performance and ease troubleshooting between networks. PerfSONAR includes a suite of tools to monitor and measure network performance.

PNWGP operates two PerfSONAR nodes –

  • is the throughput monitoring node. It is connected to PNWGP’s core routers at the Westin building at 10Gbps.
  • is the latency measurement node. It is housed at the University of Washington campus and is connected to a CDMA-derivedtime source to provide accuracy to within 10 microseconds.

PerfSONAR provides two performance monitoring tools for users: NDT and NPAD. Both tools perform a series of TCP tests designed to find bottlenecks and misconfigurations on the path between the client and server. Both require a web browser with Java enabled, although command-line clients are also available. Further documentation on the tools can be found on the page for each tools.

PNWGP no longer runs a stand-alone iperf server on web100. Access to iperf is now controlled by bwctl, a wrapper that prevents multiple tests from interfering with each other. If you were previously using iperf to
perform throughput tests, and neither NDT nor NPAD suits your needs, you can install bwctl on your local machine with iperf to perform those tests.

PNWGP participants are encouraged to deploy PerfSONAR in their own networks for performance monitoring. If you have a server, please consider joining the TLPW community to make it easier for other PNWGP participants and regional partners to find you. You are also welcome to join the Translight/Pacific Wave PerfSONAR club, a group which shares experiences and highlights issues with PerfSONAR deployment.

If you have questions about the iperf server or test results, please contact the Network Operations Center at or +1 206-934-5580