[AG-TECH] Linux networking problems

[Jon Salva]

Also check your ports on your switch. If you don't have access/entitlement
to manage the switch, and your switch isn't locked down on your MAC
address - swap the stations & ports, try your test again and see if the
problem transfers to the other stations.


 -----Original Message-----
From: 	owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov]  On
Behalf Of Linda Winkler
Sent:	Wednesday, July 25, 2001 9:56 AM
To:	Kay Gunn; ag-tech at accessgrid.org
Subject:	Re: [AG-TECH] Linux networking problems

check that full duplex was negotiated correctly
between host and switch
lw

At 09:19 AM 7/25/2001, Kay Gunn wrote:

>I have noticed some weird behaviour/poor network performance on my Linux
>audio and video capture stations.  They are running the AG 1.0 linux 6.2
>OS downloaded from ftp://ftp.mcs.anl.gov/pub/AG/redhat-2001-0614-0732.iso.
>In one machine I have an Intel PCI EtherExpress Pro 100 network card, in
>the other a PCI 3c905c Tornado.  They are both set to run full duplex
>100MB and are hooked up to the same switch as a Redhat linux 7.1 ftp
>server.  When ftping files btw the grid nodes and my ftp server, I get a
>transfer rate of less than 3MB/second on each machine.  Doing the same
>transfer btw the ftp server and 2 different machines on the same switch
>running Redhat 7.1 with the same PCI 3c905c Tornado cards set to 100MB
>full duplex, I get a transfer rate of 11MB/sec. I've run these tests
>multiple times and always get the same results.
>
>Basically I'm getting much better thruput with 7.1.  Anyone have any ideas
>as to how to fix this with the AG release?
>
>------
>Kay Gunn