NIC card problems

[Will McDonald]

On 6/15/05, Bill Tangren <bjt at aa.usno.navy.mil> wrote:
> Will McDonald wrote:
> > On 6/15/05, Bill Tangren <bjt at aa.usno.navy.mil> wrote:
> >
> >>This server has dual NIC cards (Intel Corp. 82541 GI/PI Gigabit Ethernet
> >>Controller)
> >>
> >>I set both up, but they don't seem to be working properly. The minihub
> >>they are plugged into indicated they are running at 10 mbps.
> >
> >
> > Have you looked at the output of...
> >
> > ethtool eth0
> > ethtool eth1
> > mii-tool
> > /sbin/ifconfig -a
> > netstat -rn
> >
> > The cards could be negotiating the wrong link speed/duplex settings
> > with the hub. If your mini hub only supports 10MBit/Half-duplex then
> > try fixing the cards at that speed.
> >
> > Will.
> >
> 
> How do I fix the card speed?

It depends which utility "works" on your system. 

On some older 10/100 MBit interfaced rackmount systems we manage
ethtool doesn't report anything and mii-tool reports link status
accurately.

On newer boxes with GBit interfaces mii-tool reports 100 MBit link
speed for links which ethtool reports 1000 MBit and that is the actual
speed of the interfaces.

Read the man page for ethtool and mii-tool or Google for how to
actually "fix" interface speeds.

http://www.google.co.uk/search?hl=en&q=ethtool+mii-tool&meta=

If I remember rightly sometimes it can be done when loading the driver
from /etc/modules.conf / /etc/conf.modules , other times you might
have to do it somewhere like /etc/rc.d/rc.local using
mii-tool/ethtool.

Will.