OWAMP (One-Way Active Measurement Tool)
OWAMP is a command line client application and a policy daemon used to determine one way latencies between hosts. It is an implementation of the OWAMP protocol (see references) that is currently going through the standardization process within the IPPM WG in the IETF.
With roundtrip-based measurements, it is hard to isolate the direction in which congestion is experienced. One-way measurements solve this problem and make the direction of congestion immediately apparent. Since traffic can be asymmetric at many sites that are primarily producers or consumers of data, this allows for more informative measurements. One-way measurements allow the user to better isolate the effects of specific parts of a network on the treatment of traffic.
The current OWAMP implementation (V3.1) supports IPv4 and IPv6.
Example using owping (OWAMP v3.1) on a linux host:
| Code Block |
|---|
welti@atitlan:~$ owping ezmp3 Approximately 13.0 seconds until results available --- owping statistics from [2001:620:0:114:21b:78ff:fe30:2974]:52887 to [ezmp3]:41530 --- SID: feae18e9cd32e3ee5806d0d490df41bd first: 2009-02-03T16:40:31.678 last: 2009-02-03T16:40:40.894 100 sent, 0 lost (0.000%), 0 duplicates one-way delay min/median/max = 2.4/2.5/3.39 ms, (err=0.43 ms) one-way jitter = 0 ms (P95-P50) TTL not reported no reordering --- owping statistics from [ezmp3]:41531 to [2001:620:0:114:21b:78ff:fe30:2974]:42315 --- SID: fe302974cd32e3ee7ea1a5004fddc6ff first: 2009-02-03T16:40:31.479 last: 2009-02-03T16:40:40.685 100 sent, 0 lost (0.000%), 0 duplicates one-way delay min/median/max = 1.99/2.1/2.06 ms, (err=0.43 ms) one-way jitter = 0 ms (P95-P50) TTL not reported no reordering |
References
- Internet2 Web page about OWAMP - http://e2epi.internet2.edu/owamp/
Wiki Markup OWAMP Cookbook \- !http::^e2epi.internet2.edu/npw/binder-docs/owamp-cookbook.pdf!
- RFC 4656, A One-way Active Measurement Protocol (OWAMP), S. Shalunov, B. Teitelbaum, A. Karp, J. Boote, M. Zekauskas, September 2006
– Main.ChrisWelti - 03 Apr 2006 - 03 Feb 2009
– Main.SimonLeinen - 29 Mar 2006 - 01 Dec 2008