[Gllug] Intermittent Network Loss on Centos Web Server

[Peter Corlett]

On 22 Sep 2009, at 18:27, George Siddiqui wrote:
> I'm experiencing regular intermittent (10-20 per day)  network dropout
> (over SSH and HTTP) on a web server running Centos 5.3 and was
> wondering if someone here could suggest what I could try next.


Assuming that the network infrastructure is otherwise sane and  
functional, pretty much every intermittent problem with network cards  
on Linux can be solved by ripping out the useless piece of crap  
currently installed, and replacing it with an Intel card.

My caveat about sane and functional networks is because occasionally  
you find some muppet network admin has done something stupid on the  
switch like turn off autonegotiation, which is required for GigE to  
work reliably. To fix this, you can either break a few fingers until  
the network admin gains a Clue, or if that doesn't work, drop an  
unmanaged switch between the misconfigured switch and your kit and  
hide it.

The latter "fix" appears to be common enough that two port switches  
exist, even though they are theoretically pointless.


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