1. 14-Nov-07 OWAMP (One-Way Latencies) BWCTL (Bandwidth Test Control) Jeff Boote (boote@internet2.edu)boote@internet2.edu Network Performance Tools BOF-SC07

2. 2006-Apr-05 2 BWCTL: What is it? / What is it good for? A resource allocation and scheduling daemon for arbitration of iperf tests Users want to verify available bandwidth from their site to another. Methodology Verify available bandwidth from each endpoint to points in the middle to determine problem area.

3. 2006-Apr-05 3 Typical Performance Debugging Process Run “iperf” or similar tool on two endpoints and hosts on intermediate paths Typical road blocks Need software on all test systems Need permissions on all systems involved (usually full shell accounts*) Need to coordinate testing with others * Need to run software on both sides with specified test parameters * (* BWCTL was designed to help with these)

4. 2006-Apr-05 4 Future (soon) Plans Additional ‘testers’ integrated more closely: Thrulay(api)/nuttcp/pathload Iperf (api) (Am I missing anything I should really be considering?) Direct NMWG-Schema output Bug fixes relating to time offset issues Minor feature additions (parallel streams…) RPM packages

5. 2006-Apr-05 5 Availability Currently available http://e2epi.internet2.edu/bwctl/ Mail lists: bwctl-users@internet2.edu bwctl-announce@internet2.edu https://mail.internet2.edu/wws/lists/engineering

6. 2006-Apr-05 6 OWAMP: What is it? / What is it god for? OWD or One-Way PING Find problems in the network Congestion usually happens in one direction first… Routing (asymmetric, or just changes) SNMP polling intervals mask high queue levels that active probes can show There have been many implementations to do One- Way delay over the years (Surveyor, Ripe…) The problem has been interoperability. RFC 4656

7. 2006-Apr-05 7 Future (soon) Plans User-space high precision clock (TSC register tricks) RPM packages

8. 2006-Apr-05 8 Availability Currently available http://e2epi.internet2.edu/owamp/ Mail lists: owamp-users@internet2.edu owamp-announce@internet2.edu https://mail.internet2.edu/wws/lists/engineering

9. 2006-Apr-05 9 Future Direction perfSONAR integration Tool for creating owamp/bwctl measurement groups and collecting that data in a perfSONAR enabled archive perfSONAR integration of diagnostic on- demand control of tests. (Helpful for GUI integration)

10. www.internet2.edu