Re: Slow network problems.

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On Tue, 17 Jan 2006 15:13:54 -0600
"Aaron M. Hirsch" <aaronh@xxxxxxxxxx> wrote:

> On Tuesday 17 January 2006 14:52, Zane C. B. wrote:
> > On Wed, 18 Jan 2006 04:44:55 +0800
> >
> > John Summerfied <debian@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> > > Zane C. B. wrote:
> > > > I have two identical boxes. Each have a built in VIA Rhine II
and a
> >
> > pci
> >
> > > > Realtek 8139. When doing bandwidth tests between them, I am just
> >
> > getting
> >
> > > > about 84/5Mbps on the VIA and mid 70's on the Realteks. I am
testing
> > >
> > > Presumably, you mean Mbits/sec:-)
> >
> > Yeah, that is why I used a lower case b instead of a upper case b.
> >
> > > > using udp packets with iperf v. 1.7.0.
> > > >
> > > > We have several other of these boxes that get in the mid 90's.
> > > >
> > > > Any suggestions on what to check?
> > >
> > > What do you see as your problem?
> >
> > The fact that we have other similar boxes deployed, but am getting
far
> > better performance on them, than these to. Wondering if any one had
> > any suggestions on things to check.
> 
> Okay...have you checked for any potential duplex problems?  I would
almost 
> guarantee that, unless you've forced it, the NICs are coming up at 
> half-duplex.  Use mii-tool or ethtool.

Forcing the onboard interface to any thing actually caused problems.
Leaving it set to autonegotiate worked fine. Neither were coming up in
half-duplex.

Found what was cuasing the problems was a change in the BIOS.


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