Re: eth0 won't stay up

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[email protected] wrote:
I just reinstalled fedora core 3 to solve the dual boot problem. This time
I did graphical install so I had a minimal choice so I would have fewer
packages to remove instead of a text install. I do not know what I did
different but I created a huge problem with eth0 my log is full of the
May 4 10:38:05 jupiter kernel: eth0: link up, 100Mbps, half-duplex, lpa 0x40A1
May 4 10:38:06 jupiter kernel: eth0: link down
repeated ever fraction of a second. Any ideas what I need to do? I made
a copy of ifconfig output, route and alot of files in /etc in case they
would be helpful.

You have a problem with autonegotiation of link speed between your net card and your switch. Your best bet is to force both of them to 100Mb, full duplex.

You didn't say what kind of net card you have, nor what the switch is.
If you tell us what the NIC is, we can tell you the options to put
into /etc/modprobe.conf to force it at the Linux side.  You'll have
to consult your user manual for the switch for its commands.

In the meantime, try "ethtool eth0 speed 100 duplex full" and see if
that stops it.
- Rick Stevens, Senior Systems Engineer     [email protected] -
- VitalStream, Inc.              -
-                                                                    -
-    "Hello. My PID is Inigo Montoya.  You `kill -9'-ed my parent    -
-                     process.  Prepare to vi."                      -

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