Excessive Collisions After FC1 Installation

[Scot L. Harris]

On Wed, 2004-07-28 at 14:13, Christopher A. Smith wrote:
> > 
> > I would start by verifying the duplex settings on the NIC in the FC1 box
> > and the port on the switch.  mii-tool should let you check the setting
> > and force it.  100Mbp connections should be set to full duplex.
> > 
> > I have seen some cisco switches that fight with some systems (in my
> > experience SUN servers had this problem).  The auto-negotiate would not
> > work as expected for some reason.  Lock down the speed and duplex
> > settings on the switch and the NIC to eliminate this as a possible
> > problem.
> 
> Yep, that was the problem.  The NIC was in half-duplex and is much happier
> in full-duplex.
> 
> I didn't even think of that because auto-negotiation has been running fine
> here for so long.  Oh well.
> 
> Thanks!

No problem!  Glad it was something simple like that.  I spent way to
much time the first time I saw this problem.  Could not get several SUN
servers to run at full speed on the network.  Tried all kinds of stuff
until I figured out how to look at the duplex options on the SUN
interfaces.  

BTW: are you using Cisco switches?  If so what model?  I have seen this
problem using Cisco 3548 and 2924 switches as well as with a bigger
Catalyst switch.  At the time I figured it was more of a problem with
the SUN servers interface but I am beginning to wonder if
auto-negotiation has an intermittent problem on Cisco equipment.

-- 
Scot L. Harris
webid at cfl.rr.com

You don't become a failure until you're satisfied with being one.