Internet2 Performance Tools

One-Way Ping (OWAMP)
With the availability of GPS- and CDMA-based time sources, hosts have very accurate time sources; by standardizing a technique for collecting IPPM one-way active measurements, IPPM metrics may be collected across a far broader mesh of Internet paths than is currently possible. Widespread deployment of open OWAMP servers would make measurement of one-way delay as commonplace as measurement of round-trip time using an ICMP-based tool, like ping. Click here for a 2-page overview.

Bandwidth Test Controller (BWCTL)
Scheduling bandwidth tests, like Iperf, can be very difficult -- testers at each end of the path need to agree upon a precise time to begin tests and they must each participate in activating the tests; else, the administrator at the remote site must grant the tester an account on a machine within their domain for some period of time. By using BWCTL to schedule such tests, administrators need only designate a machine in their domain for the tests and set policy regarding the duration of tests and which users may have access; after that, the BWCTL daemon process self-schedules and ensures that tests do not overlap.Click here for a 2-page overview.

Thrulay
Thrulay is a tool to allow testers to collect data on both delay and throughput at the same time. This is an implementation of a tool formerly called I2Perf.

Network Diagnostic Tool (NDT)
This java applet was developed to test the reliablity and operational status of your desktop computer and network connection. It does this by sending data between your computer and this remote NDT server. These tests will determine: The slowest link in the end-to-end path (Dial-up modem to 10 Gbps Ethernet/OC-192); The Ethernet duplex setting (full or half); If congestion is limiting end-to-end throughput. It can also identify 2 serious error conditions: 1) Duplex Mismatch and 2) Excessive packet loss due to faulty cables. Click here for a 2-page overview.