FC3 box brings lan to its knees

[Kyrre Ness Sjobak]

fre, 05.11.2004 kl. 15.52 skrev Charles R. Anderson:
> On Fri, Nov 05, 2004 at 02:29:28PM +0000, Marc McAllister wrote:
> > I don't have a spare hub I'm afraid, I'm pretty much stuck with the
> > configuration that I have. I presume if I run ethereal from my FC2 box it will
> > not pick up anything "interesting" that is being broadcast from the FC3 box?
> 
> The FC2 box should pick up broadcasts, but not unicasts after the 
> first one when the switch first learns where each MAC address is.
> 
> You could also try running ethereal on the FC3 box itself--it should
> then capture all traffic.
> 

Or you could do som MAC-spoofing... Not simple, but possible... Or does
SELinux prevent this?

> > What things should I check on the FC3 box, are there any log files that will
> > show what happens during boot etc?
> 
> Try ethtool and/or mii-diag to see what speed/duplex the NIC is
> running at.  Compare that with the lights on the switch to see if the
> speed and duplex are matched at both ends of the link.  If they
> mismatch, then many errors could be generated.