These might be helpful:
http://fasterdata.es.net/network-tuning/
http://www.mellanox.com/related-docs/prod_software/Performance_Tuning_Guide_for_Mellanox_Network_Adapters.pdf
-Azher
On 4/1/2013 3:51 PM, CiscoNSP List wrote:
Hi,
We have a 40Mb link between 2 POPs - Latency ~65m/sec (No packet-loss)
POP A Is a 7301 and 2960POP B is a 7200 and 4948
40Mb link is connected to the two switches (L2), and then a trunk link to both
routers for all L3.
Have a Linux server connected to both switches, and achieve the following
performance:
IPERF (UDP)
POP A -> POP B - 38.5Mb/secPOP B -> POP A - 38.5Mb/sec
IPERF (TCP)
POP A -> POP B - ~20Mb/secPOP B -> POP A - ~12Mb/sec
FTP
POP A -> POP B - ~38Mb/secPOP B -> POP A - ~16Mb/sec
WGET
POP A -> POP B - ~30Mb/sec POP B -> POP A - ~16Mb/sec
Any suggestions on why I am seeing poor performance with TCP transfers?
(Especially POP B -> POP A direction) - I've tried adjusting the window size in
IPERF but it actually made the results worse?
Thanks in advance.
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