Hello All,
I have a group of 4 workstation that sit on my sales switch. My bandwidth on this switch is horrible. Even when I stay on it and don't hit the switch that it's uplinked to. I've wrote a small script that utilizes iperf.exe in order to check my bandwidth. Below are a couple of tests.
How to read the below tests:
The 1st line is the negotiated port
the next 3 lines are the speed traffic is being sent from one system to the other
the 5th line is the average of that test.
The other half is the same thing just in the opposite direction.
This is the command I'm using:
"iperf.exe" -f mb -c computername -r -t 15 -i 5
Below are the results:
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Server listening on TCP port 5001
TCP window size: 0.01 MByte (default)
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Client connecting to scsa01, TCP port 5001
TCP window size: 0.01 MByte (default)
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[ 4] local 172.24.27.22 port 3335 connected with 172.24.27.63 port 5001
[ 4] 0.0- 5.0 sec 3.31 MBytes 5.56 Mbits/sec
[ 4] 5.0-10.0 sec 2.30 MBytes 3.87 Mbits/sec
[ 4] 10.0-15.0 sec 2.67 MBytes 4.48 Mbits/sec
[ 4] 0.0-15.3 sec 8.30 MBytes 4.56 Mbits/sec
[ 4] local 172.24.27.22 port 5001 connected with 172.24.27.63 port 1357
[ 4] 0.0- 5.0 sec 0.20 MBytes 0.34 Mbits/sec
[ 4] 5.0-10.0 sec 0.20 MBytes 0.33 Mbits/sec
[ 4] 10.0-15.0 sec 0.20 MBytes 0.33 Mbits/sec
[ 4] 0.0-15.7 sec 0.61 MBytes 0.33 Mbits/sec
iperf.exe exited on scsa02 with error code 0.
1st test scsa02 to scsa01
2nd test scsa01 to scsa02
I simply can't explain these results. Let's try another:
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Server listening on TCP port 5001
TCP window size: 0.01 MByte (default)
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Client connecting to scad01, TCP port 5001
TCP window size: 0.01 MByte (default)
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[ 4] local 172.24.27.22 port 3343 connected with 172.24.27.83 port 5001
[ 4] 0.0- 5.0 sec 9.21 MBytes 15.5 Mbits/sec
[ 4] 5.0-10.0 sec 8.94 MBytes 15.0 Mbits/sec
[ 4] 10.0-15.0 sec 10.6 MBytes 17.8 Mbits/sec
[ 4] 0.0-15.0 sec 28.8 MBytes 16.1 Mbits/sec
[ 4] local 172.24.27.22 port 5001 connected with 172.24.27.83 port 4776
[ 4] 0.0- 5.0 sec 0.20 MBytes 0.34 Mbits/sec
[ 4] 5.0-10.0 sec 0.19 MBytes 0.31 Mbits/sec
[ 4] 10.0-15.0 sec 0.20 MBytes 0.34 Mbits/sec
[ 4] 0.0-15.7 sec 0.61 MBytes 0.33 Mbits/sec
iperf.exe exited on scsa02 with error code 0.
1st test scsa02 to scad01
2nd test scad01 to scsa02
On other test with other systems sometime I'll see 50 or 60 meg one way and less than a meg the other way. Which to me screams duplex mismatch, however, there isn't one.
These systems all reside on the same switch.
Things I've tried:
1.) Replaced switch
2.) Updated workstation nics (the drivers were fairly outdated)
3.) tried forcing 10-half, 10-full, 100-half, 100-full and auto
I got the same results for all. The only thing I haven't tried is making a crossover and hooking them back-to-back. I am seriously at a loss. Again, it acts like duplex problem but that simply isn't the case.
Anybody have an Idea as to what I can do next to find a solution?
Thanks
Eric
