On Tue, 17 Jan 2006 15:13:54 -0600
"Aaron M. Hirsch" <aaronh(a)uptime.net> wrote:
On Tuesday 17 January 2006 14:52, Zane C. B. wrote:
> On Wed, 18 Jan 2006 04:44:55 +0800
>
> John Summerfied <debian(a)herakles.homelinux.org> 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.