From: Jay Hennigan (jay@west.net)
Date: Thu Jan 16 2003 - 23:21:46 GMT-3
On Fri, 17 Jan 2003, Fan Shan wrote:
> May I ask a question not very relational to CCIE.
> I am working for a IDC, one our customer complained their application is slow. They ask to test the ftp speed between our two switch port.
> BTW, our structure is connecting customers to 6509 FE port,and 100M bandwidth supplied.We put 2 PC to 2 port, assign different vlan for these 2 port,
> one to be ftp client,another to be ftp server, the test result is 300-400Kbytes/s. We can see the mls entry established by the two ip address.The customer
> says the speed is too slow comparing to the port speed(100M).But we think this may be resulted in the tesing PCs or some features of FTP protocol.
> But I cannot explain why the speed maybe slow between two switch ports,but very fast to other sites on the internet. Can someone help me to explain that?
It could be any number of things, MTU/fragmentation issues, performance
of the PCs themselves or the FTP server/client applications.
Gather some facts:
* Try both PCs with just a crossover cable to get a benchmark.
* Then put them on the same VLAN.
* Then the setup you have now on different VLANs.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net NetLojix Communications, Inc. - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323 .
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