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New Member

gigabit performance

We are experiencing performance problems. When doing a filecopy between two NT4s we get about 7MB/s. When doing a blast (wsttcp.exe) I get around 30 MB/s between the two server. A local blast to the loopback gives 30 MB/s and 55MB/s for the two servers. I do not see any errors increasing on the port of the CAT4003 with WSX4418 module and on the NIC statistics...

I would expect around 100 MB/s when doing a blast on Gb??

5 REPLIES
Green

Re: gigabit performance

Describe your servers. What processor speed? Are you using 64 bit NICS in 64 bit / 66Mhz mode?

Aside from that, NT4 is somewhat less than a "performer" with high speed network interfaces.

Are you using fiber or copper?

If copper, have you tried other media? Are the jumpers you're using hand-made or purchased? Have you tried other physical paths?

If fiber, have you checked to see that the ends are clean & well terminated? Have you checked for extreme bends (smaller than a 1-2" radius) / kinks / nicks / connectors with no strain reflief? Did you also check the panels to see that the jack is clean / dust-free / in good shape?

What version of code are you running on the switch? Firmware Revs?

New Member

Re: gigabit performance

Two Compaq ML370 (933 mhz).

I am using Intel Pro/1000 (sx).

What would you expect as acceptable speed??

New Member

Re: gigabit performance

I don't have the details in front of me (and my brain was already full - so I don't have it memorized) but NT sets the TCP parameters differently depending on the type of file transfer (pushing a file or pulling a file) etc. Look at the Microsoft web site for some information. You may gain some speed if you hack the registry. Good luck.

Cisco Employee

Re: gigabit performance

Have you check for NIC issues described in the following document:

www.cisco.com/warp/customer/473/46.html

I recall something about using NT4.0 with Compaq Netflex requires the compaq driver for performance over the standard Windows driver.

New Member

Re: gigabit performance

I am not sure if you have disabled the full duplex function in NIC and Router.. I have experienced the similar problem before. It works after I did it.

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