> 
> Did you run your iperf tests also with UDP? (The numbers don't look
> like it.)
> 
> With TCP you won't see many drops on your switches, it will adjust - and
> you will see less throughput.
> 
> With iperf available at all three sites I would run tests with UDP streams.
> This won't find the maximum bandwith automatically, you have to set a
> bandwidth for testing and see if you have any packet loss.
> 
> Keep in mind that your carrier might police on ethernet bandwidth,
> iperf measures IP throuput.

Thanks Klaus - No, did not test with udp...here it is:
(With 100M had too many drops - 80M was the best:)[  3] local xxx.xxx.73.54 
port 45790 connected with xxx.xxx.65.2 port 5001[ ID] Interval       Transfer   
  Bandwidth[  3]  0.0-10.0 sec  95.4 MBytes  80.0 Mbits/sec[  3] Sent 68029 
datagrams[  3] Server Report:[  3]  0.0-10.0 sec  95.4 MBytes  80.0 Mbits/sec  
0.044 ms    1/68028 (0.0015%)[  3]  0.0-10.0 sec  1 datagrams received 
out-of-order
So to be able to see similar performance with tcp, I will need to adjust tcp 
window correct?

                                          
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