To all, I am currently a student at Oklahoma State University. I am doing a Research project on an Enterprise network with Iperf. I am encountering an anomaly that I haven't been able to figure out. When I run a UDP test at a packet size of 1470 the test will consistently fail (Warning: ack of last datagram not received after 10 tries). If I lower the packet size below 1273 then the test will consistently pass but still fail occasionally. Is there anything particular about the way Iperf creates the packets and/or socket that may be seen as suspicious or unallowable on a typical large campus network? I am aware of the overhead created by Iperf and the MTU on the routers the packets have to cross are set to 1500. The DF bit is also turned off on the routers. The packets are also travelling by way of a GRE tunnel which also creates its own overhead. I am not much of a programmer so I can't really determine what I need to know by looking at the source code. Any help on this matter would greatly appreciated. Thanks.
Matthew Reynolds (405)613-1016
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