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Mike Thank you for your explanation. i was using 3.3.4 version of tcpreplay, but your explanation has helped me out and answered my question! Thanks! Kevin On 08/31/2011 07:13 PM, tcpreplay-users-requ...@lists.sourceforge.net wrote: On Tue, Aug 30, 2011 at 2:39 PM, Kevin Johnson <kevin.john...@noaa.gov>wrote:Actual: 4260724 packets (5515523064 bytes) sent in 117.95 seconds. Rated: 46761536.0 bps, 356.76 Mbps, 36123.14 pps We noticed that 356MB/s is actually greater than the top speed which can be achieved over a GB network ... for my test, I just had a single cat-5e cable going from eth0 on one machine to eth0 on the other and both configured with private LAN addresses.First, it looks like you're using a somewhat older version of tcpreplay (I was similarly confused with the output from that version).The first number (46761536.0) is actually the *Bytes* per second, it should be labeled as Bps and is in the latest version I believe. The second number (356.76) is the speed in *bits* per second, however in your version the calculation is incorrect (using 1024*1024 instead of 1000*1000 for the units conversion). So, you sent 5515523064 Bytes in 117.95 seconds, this translates into: 5515523064 Bytes / 117.95 seconds = 46761535.09 Bytes per second and (46761535.09 Bytes * 8 bits/Byte) / (1000*1000) = 374.09 Megabits per second. -- Michael J Schultz --
Kevin P Johnson, RHCE™ Principal Engineer AWIPS Evolution & Systems Engineering Mission Operations & Services Raytheon Company +301-495-2257 (office) +301-244-8575 (cell) kevin.john...@noaa.gov 8401 Colesville Road Suite 800 Silver Spring, MD 20910 www.raytheon.com  This message contains information that may be confidential and privileged. Unless you are the addressee (or authorized to receive mail for the addressee), you should not use, copy or disclose to anyone this message or any information contained in this message. If you have received this message in error, please so advise the sender by reply e-mail and delete this message. Thank you for your cooperation. |
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