topic Re: Download slow / upload fast in Operating System - Linux

Download slow / upload fast

Ryan Lee — Tue, 11 May 2004 22:37:16 GMT

I through ftp to get/put 17mb files, it will take 140second/10second. now I using the kernel is 2.4.21-9.0.1ELsmp.
Do you recommend update kernel to fix.

Thanks
Ryan

Re: Download slow / upload fast

U.SivaKumar_2 — Tue, 11 May 2004 23:06:14 GMT

Hi,

Please give more details. you have any routers/switches in between ?. Or client and server are in the same switch ?.

Check for Duplex mismatch of server,clients when connecting to switches.

#mii-tool

regards,

U.SivaKumar.

Re: Download slow / upload fast

Jeroen Peereboom — Wed, 12 May 2004 00:39:50 GMT

Ryan,

most probably the duplex settings are incorrect. I've experienced this a few times and used ftp as a test for Windows and HP-UX servers (we did not have Linux a year ago): if the upload speed equals (more or less) the download speed the speed/duplex settings of the switch and the server are correct (or at least compatible).

If the speed of the server is half duplex and the switch settings i full duplex, upload from the server will be at normal speed, but downloadwill be slow because the switch goes too fast.

JP.

Re: Download slow / upload fast

Steven E. Protter — Wed, 12 May 2004 00:58:44 GMT

Assuming your network configuration of the NIC is correct this issue is probably not your kernel.

The standard kernel configuration does not set this behavior. I would check the following:

1) Speed and duplex of the NIC card(software)
2) Speed of port and router configuration.
3) Same things on the client.

SEP

Re: Download slow / upload fast

Ryan Lee — Wed, 12 May 2004 01:11:26 GMT

I using 10/100 switch and detected full 100 speed, also updated new bcm5700 driver. if the problem on the switch, why we get different speed on the upload/download?
I finding similar case. but I am not sure it can fix my problem.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=104633

Thanks
Ryan

Re: Download slow / upload fast

Ryan Lee — Wed, 12 May 2004 01:15:22 GMT

Thanks all
The NIC should been detected half 100 speed, I checking switch now.