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Hi, I am seeing a discrepancy in packet counters on IPERF 1.7.0
and on Wire Shark, which I think is packet loss numbers. First I am
running IPERF 1.7.0 on two Win2K3 server boxes, separated by an MPLS network. I
run IPERF client on one box and IPERF server (both in UDP mode) and send for
about half an hour @ 2.5M using 1400 byte packet size (the network allows 3M
and the MTU is 1500). The conclusion of one of my tests is below: [1924] 0.0-1799.9 sec 536 MBytes
2.50 Mbits/sec 8.214 ms 61/413505 (0.015%) If I count the number of packets sent by the client and
received by the server using Wire Shark (with a filter to look at just UDP
packets sent to port 5001 at size 1400 bytes) I see 413505 packets on the
sending side and 413502 on the receiving side. I have also set up some packet debug on the routers that
these two servers connect to and looked at the total number of packets sent and
received at each side - these numbers always match Wire Sharks numbers. So
it doesn’t look like I’m actually losing the packet, is it because
IPERF is looking at something else? I use the default buffer size of 8K
for the server side of UDP; perhaps I should try increasing that. Has anybody seen anything similar in the past? Any
comments welcomed!! Cheers, Barry The information contained in this email is strictly confidential and subject to the Confidentiality Notice at http://www.stratosglobal.com/email-privacy.html |