Why is my gigabit ethernet so slow?

Feb 18, 2005
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I just got a new laptop that supports gigabit ethernet. Since my desktop also supports gigabit, I thought I'd add a new switch so I can transfer my music files. I bought a Linksys SD2005 gigabit switch. So my network is now set up as follows:

The cable modem is hooked up to a Linksys WRT54G wireless router. Connected to the router are a printer and a VOIP device. There's also a CAT 6 cable from the router to the new gigabit switch. Both the computer and laptop are connected via CAT 6 cable.

I have the default workgroup setup on the desktop computer and I turn sharing on for the music folder. From the laptop, I can see the shared music folder and can drag music files to the laptop. However, when I drag the music files to the laptop, I usually get transfer speeds of only about 3 to 4 MB/sec (though I did get 7 MB/sec once). If I were taking full advantage of the gigabit speed, I should be getting much faster transfer speeds.

What am I doing wrong?
 

Madwand1

Diamond Member
Jan 23, 2006
3,309
0
76
There could be a number of potential causes. You need some analysis to determine where the problem lies. I suggest starting by testing the network level without file transfers. E.g. using iperf version 1.7:

http://dast.nlanr.net/Projects/Iperf/

server: iperf -s
client: iperf -c server -l 64k -t 15 -i 3 -r

 

Goosemaster

Lifer
Apr 10, 2001
48,775
3
81
Originally posted by: Madwand1
There could be a number of potential causes. You need some analysis to determine where the problem lies. I suggest starting by testing the network level without file transfers. E.g. using iperf version 1.7:

http://dast.nlanr.net/Projects/Iperf/

server: iperf -s
client: iperf -c server -l 64k -t 15 -i 3 -r

aye.

Also, in case your switch is finiky, amke sure both cards are set to usign jumbo frames, and are both set to 1000Mbps/Fulll duplex to rule out auto-negotiation issues