Ken897

Thanks for your help!! Just want to double check, does your NIC card also have such behavior? When you set the adapter speed at 100MB/Full duplex, then unplug the nic cable and the cpu utilization will go out for few seconds. But when we set the adapter speed back to automatic, then unplug the nic cable will not have any cpu utilization.

The reason to unplug the nic cable is trying to simulate nic cable fail, especially i have the two ports team up as Network Fault Tolerance, then i noticed whenever I unplug the nic cable, the CPU utilization went up. It happened only when the adapter speed is set to 100MB/Full duplex. Cause my nic cable is connected to the CISCO 2950. Since it is set to run at 100MB/Full duplex, that's why network admin told us to set the adapter speed to 100B/Full duplex as well. I also team up the broadcom embedded nic as Network Fault Tolerance. It is also set at 100MB/Full duplex, but when i unplug the nic cable from the embedded nic port, it doesn't have this CPU utilization at all. I just want to know what is the reason behind this Intel card will generate this CPU utilization, when the nic cable is connected?

I have a HP NC360T 2 ports NIC card, it is using the Intel 82571EB chipset. Could anyone explain to me why when the network cable is unplugged from the NIC Port, the CPU Utilization will go up to 60 to 70% for 3 to 4 seconds, causing my keyboard, mouse and application to hang for that few seconds. The OS is Windows 2003 SP1 Standard Server. My server also come with the embedded NIC, which is the NC373i, when I unplug the nic card from the NC373i, there is no CPU utilization, my keyboard, mouse and application have no issue. At first I thought maybe due to the Intel and Broadcom driver. But my other server has the NC7170, which is using Intel driver, but when I unplug that nic cable from the NC7170, there is no CPU utilization neither. But the NC7170 is a PCI-X adapter. I only have one PCI-Express NIC to try. Not sure is there anyone have a PCI-Express NIC using Intel or Broadcom driver. When unplug the NIC cable, the CPU utilization will go up to 70% for few seconds or not? If yes, why it will generate so high CPU utilization, while the other nic controller has no such behavior.