5.1 box network hang....

[Sean Hafeez]

I have a strange issue. Running 5.1 on an AMD w/512 RAM. 20GB IDE and a 
Firewire card that has a 120GB drive on it. The load on the box is under 
1%. The NIC is a RealTech. It was an Intel PRO/100 card.

The issues:

Networking stops running. Everything is up. All the processes are runing 
the interface is up. But you cannot do anything with the network. Pings 
hang. You can bring the interface up and down and still hung. There is 
nothing in the logs. This happend every 3-5 days. I have replaced the NIC.

Thoughts?