[realtek] Slow transfer speed

Donald Becker becker@scyld.com
Tue Mar 5 13:51:01 2002

On Tue, 5 Mar 2002, Thomas Young wrote:

> To: realtek@scyld.com
> I have a network of 2 computer both have Realtek RTL8139 network cards 
> installed. These are connected directly by Cat5 cable. The problem is the 
> network is really slow in one direction. Say a 1meg transfer would take 
> 10sec from PC1 to PC2. It would take 10min from PC2 to PC1.

What driver version?
What is the driver detection messages?
Are you getting errors reported in /proc/net/dev?
What does 'mii-diag' report?

My guess is that you have a bad cable, likely mispaired in one direction.

Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993