Slow File Transfer Performance

Unanswered Question
Jul 7th, 2011
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In our environment we use Cisco 3560x series switches for servers.

Switch Ports Model              SW Version            SW Image                

------ ----- -----              ----------            ----------              

*    1 54    WS-C3560X-48       12.2(53)SE2           C3560E-UNIVERSALK9-M   

All ports have speed 1000 and duplex full configuration. On the same switch when we copy file test between windows servers , speed is normal (single file 5 gb approximately 80 seconds ). But when we test with linux or solaris servers, we maximum see  14 - 30 mb/s (single file) .For gigabit performance i think its bad.

What do you suggest to fix this issue ?


Best regards

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Fabrice Ducomble Mon, 07/11/2011 - 08:45
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I would go first for a sniffer trace (via SPAN/monitor session). This will tell you if 'slowness' is due to inter-packet delay or packet loss. If it's due to packet loss (i.e. if there are restransmission), look for interface stats/errors at interface level.

If it's interpacket delay, troubleshooting is much more complex and could have various causes (like buffer allocation problem,etc...). Best is to investigate this via a TAC Service Request in that later case.  



Joseph W. Doherty Mon, 07/11/2011 - 09:58
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No possible duplex mismatch between switch and servers?


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