Re: Network problems on new FC4 box - please help.

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William W. Austin wrote:
> I had to replace a disk (the one with all of the home directories on  
> it) on an FC3 box, and so I bought a new drive (particulars  
> unimportant).
> To make a long story short, I decided to put FC4 on this box, and so I  
> installed the new drive and put the root filesystem on it.  I still  
> have the old FC3 root drive and can boot to either for comparison...
> Under FC3, I have no network problems that I can detect; however, under  
> FC4 there are two distinct (related? no idea) problems which have  
> eluded me.  I have tried looking up both of these in the archives, but  
> have had no luck (some similar issues, but nothing exactly like either  
> of these unless I missed them).
> Problem 1: network card goes to sleep.
> This machine has 2 network cards, both on-board.  The 1GB card L(Intel  
> 82540EM) goes to the smartswitch to tolk to the local network, and does  
> not show any problems.
> The other card (nVidia nForce2) is a 100MB card and talks to the DSL  
> modem.  Periodically I cannot connect to the internet at all - or even  
> ping the DSL modem.  This happens irregularly but about 5-10 times/day.  
> If I reboot back to FC3, the problem does not occur.  Network  
> configurations between the two (FC3/FC4) are as identical as I can make  
> them.  The first few times the problem occurs, sometimes retarting  
> networking works, but eventually a full sys reboot is the only thing  
> which works.
> Problem 2: slow local network.
> Under FC3 throughput on the LOCAL network (1GB lan) is very fast.   
> Under FC4, the best I have seen is ONE transfer of about 1.2 MB/s - and  
> throughput drops to as low as 50-75KB/s at times.  Again, this does not  
> occur under FC3 but does under FC4.  Again the same setup as nearly as  
> I can make it.  No workaround found so far.

First question: are you using Nvidia proprietary drivers? Were you? Are
they from somewhere like livna, or did you download direct from Nvidia?

Do a /sbin/lsmod | grep forcedeth if you're not sure.

(Likewise, it might be a good idea to check that your /etc/modprobe.conf
files have the right aliases for eth0 and eth1).

Second question: I note you say that the Intel card occasionally
connects at 100 Mbit/s. Do you get *any* improvements at that speed? At
10 Mbit/s? You can use the ethtool utility to change this.

Make sure that you've got the same duplex settings.

Third question: are you up to date with FC4 updates? Were you up to date
with FC3 updates?

One other point: it looks like you're reading the digest. If you do
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Hope this helps,


E-mail address: james | "But alas, we don't need a car, so I have a bus  | timetable and one day the buses will read it too."
                      |     -- Telsa Gwynne

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