Sometimes one of the laptop when attached to the dock would drop the ethernet connection. By constantly pinging the default gateway usually there are no packet drops but sometimes, it results in response as given below. This doesn't seem to be correlated to anything except that it is felt more when the system is doing a lot of things. Changing the dock as well as the cable did not make any change. One of the recommendation is that the ethernet card itself might be going bad. Is there a way to troubleshoot this before involving the hardware vendor for warranty (that doesn't go very well as they usually want to "reinstall" the Windows first)? The laptop is about 6 month old Dell Latitude windows 7 Enterprise SP1 (fully patched) on it. This doesn't happen always and the ping would go without any packet drops for several hrs. This makes it even more difficult to troubleshoot.
Reply from 10.xxx.0.254: bytes=32 time=4ms TTL=255 Reply from 10.xxx.0.254: bytes=32 time=1ms TTL=255 Request timed out. General failure. General failure. General failure. Request timed out. Reply from 10.xxx.0.254: bytes=32 time=1ms TTL=255 Reply from 10.xxx.0.254: bytes=32 time=1ms TTL=255
Log Name: System Source: e1cexpress Date: 1/25/2012 12:58:00 PM Event ID: 27 Task Category: None Level: Warning Keywords: Classic User: N/A Computer: xxxxxxxxxxxxxxxxxxxx Description: Intel(R) 82579LM Gigabit Network Connection Network link is disconnected. Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="e1cexpress" /> <EventID Qualifiers="40964">27</EventID> <Level>3</Level> <Task>0</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-01-25T20:58:00.632012400Z" /> <EventRecordID>63900</EventRecordID> <Channel>System</Channel> <Computer>xxxxxxxxxxxxxxxxxxxx</Computer> <Security /> </System> <EventData> <Data> </Data> <Data>Intel(R) 82579LM Gigabit Network Connection</Data> <Binary>0000040002003000000000001B0004A00000000000000000000000000</Binary> </EventData> </Event>