[CentOS] System drops off network after a few minutes

[John R Pierce]

Joseph L. Casale wrote:
>
> I have an Intel SE7525RP2 motherboard with a Yukon Marvel (82541GB 
> controller) NIC in it. After installing CentOS 5.1 it functions fine 
> for some minutes then looses network connectivity. By coincidence, I 
> was using the system to clean some HD’s for another and had booted off 
> Knoppix and noticed it never exhibited this behavior, the network 
> remained functional even overnight when I returned to the system?
>
> I looked through messages and didn’t see anything NIC/network related, 
> can anyone suggest something to check?
>


if it literally drops in a few minutes, run wireshark and leave it 
capturing all traffic on the LAN interface until it craps. then stop the 
capture, and look at the last set of packets.