How to configure a LAN with 2 servers connecting at 1GB

I have a network configured as seen on the attached file.
Currently the whole network in in the address range 192.168.X.0-254 with subnet 255.255.255.0

The two servers connect to a 100/1000 switch (D-link) and all other computers connected to the 10/100 switch.
I am trying to maintain 1GB connection between the servers but it looks like the connection is failrly slow.
1.  What is the right way to configure this network.
2. How can I measure the speed at which the servers are connected (both servers show 1GB on the network connection status)
LAN.pdf
ivolachAsked:
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DawilliamsConnect With a Mentor Commented:
Try this, I average 404 Mbits/sec with 3 gigs over 60 seconds I find that acceptable
iperf -s -u -w2m -i1

Those flags mean:

s: run as server
u: use UDP
w: use a buffer of 2meg
i: print out a report every second.

Then on your other PC, run iperf as a client:

iperf -c [ip address of server] -u -b400M -w2m -i1 -t60

Those flags mean:

c: run as client
u: use UDP
b: Send 400Mb/s data
w: Use a buffer of meg
t: run for 60 seconds
i: print a report every second
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that1guy15Commented:
The servers should have no issue communicating between each other at 1000. your bottle neck though is going to be communicating with the client systems since they are connected at 100.

One suggestion (if possible) to help client communication would be to connect the two switches with a gig port. If the client switch dosent have a gig port then you are running a good setup. If the D-link has the ports and can handle the number of computers then you can eliminate the 10/100 switch all together and run all devices at 1000
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ivolachAuthor Commented:
I have added the 1000 switch recently and for some reason it looks like the servers are communicating at a slower speed that when they were connected to the 100 switch.  Should I configure the server with a different subnet to avoid broadcasting traffic to all computers?
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ivolachAuthor Commented:
A quick timing test: I takes almost 17 minutes to copy a 15GB file between the servers.
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that1guy15Commented:
And both servers show you are running at 1GB?

Several things to check

Make sure both servers are connected with Cat 5e cable or higher
does the switch show both connections as 1000
You could also force the connection speed to 1000 in the nic properties.
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ivolachAuthor Commented:
Yes to all:
Cat 5e cables
switch shows 1000 connection
Both NIC indicate 1000 connection
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DawilliamsCommented:
Check the properties of the nics on all the servers, set them manually to 1000/full, also check the switch I don't know if you can force the dlink to 1000/full or not. Some times auto negotiate doesn't work for all nics and switches.
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ivolachAuthor Commented:
I have followed all the suggestions including updating the drivers and yet there is no change, the speed still looks more like 100mbs than 1000mbs
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DawilliamsCommented:
Is the Dlink a switch or a hub? what model is it ? Try Iperf at http://www.noc.ucf.edu/Tools/Iperf/default.htm to get a realistic throughput.
let me know.
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ivolachAuthor Commented:
It is a switch DGS-1008D
Here are the iperf results:
------------------------------------------------------------
Client connecting to 192.168.xx.y, TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[1884] local 192.168.xx.x port 1149 connected with 192.168.xx.y port 5001
[ ID] Interval       Transfer     Bandwidth
[1884]  0.0-10.0 sec   378 MBytes   316 Mbits/sec
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ivolachAuthor Commented:
Done it.
Thses are the results witn under 1GB per 60 Sec.

[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[1884]  0.0- 1.0 sec  14.4 MBytes   121 Mbits/sec  0.000 ms 1130320979/10251 (1.
1e+007%)
[1884]  1.0- 2.0 sec  16.0 MBytes   134 Mbits/sec  0.000 ms    0/11379 (0%)
[1884]  2.0- 3.0 sec  15.9 MBytes   133 Mbits/sec  0.000 ms    0/11337 (0%)
[1884]  3.0- 4.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11360 (0%)
[1884]  4.0- 5.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11355 (0%)
[1884]  5.0- 6.0 sec  14.7 MBytes   123 Mbits/sec  0.000 ms    0/10459 (0%)
[1884]  6.0- 7.0 sec  16.2 MBytes   136 Mbits/sec  0.000 ms    0/11538 (0%)
[1884]  7.0- 8.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11357 (0%)
[1884]  8.0- 9.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11176 (0%)
[1884]  9.0-10.0 sec  16.2 MBytes   136 Mbits/sec  0.000 ms    0/11539 (0%)
[1884] 10.0-11.0 sec  14.7 MBytes   123 Mbits/sec  0.000 ms    0/10462 (0%)
[1884] 11.0-12.0 sec  15.5 MBytes   130 Mbits/sec  1.092 ms    0/11027 (0%)
[1884] 12.0-13.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10969 (0%)
[1884] 13.0-14.0 sec  14.3 MBytes   120 Mbits/sec  0.014 ms    0/10179 (0%)
[1884] 14.0-15.0 sec  9.60 MBytes  80.5 Mbits/sec  0.002 ms    0/ 6845 (0%)
[1884] 15.0-16.0 sec  12.4 MBytes   104 Mbits/sec  0.009 ms    0/ 8830 (0%)
[1884] 16.0-17.0 sec  13.6 MBytes   114 Mbits/sec  0.000 ms    0/ 9712 (0%)
[1884] 17.0-18.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11358 (0%)
[1884] 18.0-19.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11357 (0%)
[1884] 19.0-20.0 sec  16.2 MBytes   136 Mbits/sec  0.000 ms    0/11539 (0%)
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[1884] 20.0-21.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11358 (0%)
[1884] 21.0-22.0 sec  15.5 MBytes   130 Mbits/sec  1.110 ms    0/11025 (0%)
[1884] 22.0-23.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10970 (0%)
[1884] 23.0-24.0 sec  16.2 MBytes   136 Mbits/sec  0.000 ms    0/11539 (0%)
[1884] 24.0-25.0 sec  15.6 MBytes   131 Mbits/sec  0.000 ms    0/11153 (0%)
[1884] 25.0-26.0 sec  13.7 MBytes   115 Mbits/sec  0.000 ms    0/ 9767 (0%)
[1884] 26.0-27.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11358 (0%)
[1884] 27.0-28.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11357 (0%)
[1884] 28.0-29.0 sec  14.4 MBytes   121 Mbits/sec  0.000 ms    0/10281 (0%)
[1884] 29.0-30.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/11002 (0%)
[1884] 30.0-31.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11356 (0%)
[1884] 31.0-32.0 sec  15.5 MBytes   130 Mbits/sec  1.137 ms    0/11024 (0%)
[1884] 32.0-33.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10972 (0%)
[1884] 33.0-34.0 sec  14.2 MBytes   119 Mbits/sec  0.000 ms    0/10108 (0%)
[1884] 34.0-35.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11174 (0%)
[1884] 35.0-36.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/11002 (0%)
[1884] 36.0-37.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11177 (0%)
[1884] 37.0-38.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11175 (0%)
[1884] 38.0-39.0 sec  14.2 MBytes   119 Mbits/sec  0.000 ms    0/10108 (0%)
[1884] 39.0-40.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11176 (0%)
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[1884] 40.0-41.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11176 (0%)
[1884] 41.0-42.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11365 (0%)
[1884] 42.0-43.0 sec  15.9 MBytes   133 Mbits/sec  0.000 ms    0/11350 (0%)
[1884] 43.0-44.0 sec  13.2 MBytes   110 Mbits/sec  0.000 ms    0/ 9391 (0%)
[1884] 44.0-45.0 sec  11.9 MBytes  99.8 Mbits/sec  0.000 ms    0/ 8483 (0%)
[1884] 45.0-46.0 sec  13.7 MBytes   115 Mbits/sec  0.000 ms    0/ 9744 (0%)
[1884] 46.0-47.0 sec  15.7 MBytes   132 Mbits/sec  0.000 ms    0/11183 (0%)
[1884] 47.0-48.0 sec  15.9 MBytes   134 Mbits/sec  0.000 ms    0/11355 (0%)
[1884] 48.0-49.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10995 (0%)
[1884] 49.0-50.0 sec  14.7 MBytes   123 Mbits/sec  0.000 ms    0/10463 (0%)
[1884] 50.0-51.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/11001 (0%)
[1884] 51.0-52.0 sec  15.2 MBytes   127 Mbits/sec  1.098 ms    0/10841 (0%)
[1884] 52.0-53.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10977 (0%)
[1884] 53.0-54.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11179 (0%)
[1884] 54.0-55.0 sec  14.4 MBytes   121 Mbits/sec  0.000 ms    0/10281 (0%)
[1884] 55.0-56.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11178 (0%)
[1884] 56.0-57.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11177 (0%)
[1884] 57.0-58.0 sec  15.7 MBytes   131 Mbits/sec  0.000 ms    0/11180 (0%)
[1884] 58.0-59.0 sec  15.4 MBytes   129 Mbits/sec  0.000 ms    0/10997 (0%)
[1884] 59.0-60.0 sec  14.2 MBytes   119 Mbits/sec  0.000 ms    0/10105 (0%)
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[1884]  0.0-60.0 sec   908 MBytes   127 Mbits/sec  1.110 ms    0/647736 (0%)
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ivolachAuthor Commented:
It looks like a problem with the switch, I have tried the connection with a third computer and got the same results.
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ivolachAuthor Commented:
Thanks for your help.  While the problem still exists, your solution helped identifying the problem and isolate it.
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