UDP receiver getting more than the sender is sending .

To: "iperf-users --at-- dast.nlanr.net" <iperf-users --at-- dast.nlanr.net>
Subject: UDP receiver getting more than the sender is sending .
From: nirav jasapara <jasapara --at-- usc.edu>
Date: Mon, 22 Mar 2004 18:08:20 -0800
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Reply-to: iperf-users --at-- dast.nlanr.net
Sender: owner-iperf-users --at-- dast.nlanr.net

Hi,

i am runnning iperf for some performance tests between two machines connected 
via a crossover cable. Strangle my UDP receiver ( 341 Mbps ) shows more 
Bandwidth then my sender ( 279 Mbps ).
<>

[jasapara --at-- node0 ~]$ ./iperf -c 10.1.4.2 -u -B 10.1.4.3 -b 280M -w 256K
------------------------------------------------------------
Client connecting to 10.1.4.2, UDP port 5001
Binding to local address 10.1.4.3
Sending 1470 byte datagrams
UDP buffer size:  256 KByte (WARNING: requested  256 KByte)
------------------------------------------------------------
[  5] local 10.1.4.3 port 32775 connected with 10.1.4.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-10.0 sec   333 MBytes   279 Mbits/sec
[  5] Server Report:
[  5]  0.0- 8.2 sec   333 MBytes   341 Mbits/sec  0.082 ms  124/237342 (0.052%)
[  5]  0.0- 8.2 sec  19879 datagrams received out-of-order
[  5] Sent 237342 datagrams

<>

How is that possbile ?

Thanks
- Nirav.

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