Network Troubleshooting Facts When you have a network problem
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1. Network Troubleshooting Facts When you have a network problem the first place to start is to open Network and Dial up Connections to check the status of the connection right click on My Network Places and choose Properties e Make sure that the network connection is enabled e Check the connection status Verify that the connection is operating at the correct speed and that packets are being sent and received e Use Device Manager to verify that the device is installed recognized and enabled e If everything appears to be working normally troubleshoot the network configuration parameters and verify that the user is logging in to the network correctly If the connection shows that the cable is unplugged check the status indicator lights on the network card e The link light indicates a valid connection to the network o A solid green light indicates a good physical connection o On some switches an amber link light indicates a slower connection such as 10 Mbps compared to a 100 Mbps connection which might show a green light e The activity light indicates that the connection is being used o This light should flash periodically even if you are not currently sending data over the link This is known as a heartbeat or keepalive signal that lets the NIC know it has an active connection o The light flashes more constantly as data is being sent The following table describes possible problems and solutions based on the network car2. computers are Make sure all cables are plugged in Swap the cable with one you know to be working Plug the computer into a different hub or switch port Troubleshoot or replace the network card having a similar problem then the problem is likely with the hub switch or router Have your network administrator check these network devices
3. d status lights Light Activity The network card does not have a connection to the network For the link light to be lit the computer must detect a connection to another device Possible causes of no link light include Bad NIC Unlit Unlit Faulty cable Missing device on the other end unplugged cable Bad hub or switch port Meaning Switch or hub port is turned off If the link light comes on but is not green then the NIC has detected a Red Amber Unlit signal but the signal is not what was expected Possible causes include e Faulty transceiver on the NIC or on the remote device Solid l Solid UBAR Solid Constantly Green flashing e Incorrectly configured network cabling e Incompatible networking standards A solid normally green link light indicates a valid physical network connection However an Activity light that never lights up means that no data is being received If this is the case check all components and connections This is a normal condition that indicates a valid active connection If the activity light is constantly flashing verify that the computer is not trying to send large files on the network If the activity light stays lit a network card somewhere is constantly sending out frames This condition is known as chattering or jabbering Replace the network card to correct the problem If a single computer is having problems i If multiple
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