Network problems on new FC4 box - please help.

[Bob Chiodini]

On Mon, 2006-02-27 at 08:18 -0500, 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.
> 
> Any suggestions would be greatly appreciated.
> 

Anything relevant in the syslog?

Bob...