Visio-network troubleshooting.vsd
Contents
1. PROBLEM The computer won t connect to the network The most common reason a computer won t connect is because it s not plugged in Unfortunately Macs don t have these handy indicator lights on the network port A unique IP address is essential for connecting to the Internet If you have one try a PING test Sometimes patch leads get damaged If you use the outlet and lead from a working computer and it still won t work it s a problem on the computer If there s no light try unplug the patch cable from one switch port to another that you know works 1 Check that the UTP cable is plugged in on both ends 2 Check if there a light flashing at the network port on the back of the computer No light means no connection to the switch 3 Does the computer have an IP address allocated 4 Try swap the patch lead and connect the computer to another outlet that you know works with another computer 5 Check the outlet number and trace it back to the patch panel and the switch in the cabinet Check for a light on the switch port it is connected to FIRST determine the extent of the problem Can other computers connect Is it just one computer not connecting BASIC NETWORK TROUBLESHOOTING FLOWCHART 1 Check if the problem is Internet only or access to your Server is lost as well 2 Check the2. cabinet and make sure the Switch es have lights on and flashing 3 Check there are lights flashing on the Backbone links on the Ethernet Switch i 4 Look closely at the lights flashing on the switch Normally the lights randomly flash If ALL the lights that are on appear to be flashing very quickly and simultaneously you may have a Bridge Loop on your network Stu Hasic 2006 If the Internet is the only problem then you need to check the router and gateway It s probably not a network problem in your school If the problem is only affecting one building check that BD If all buildings check the CD NOTE Some Fibre backbones connect via separate transceivers you need to check them as well A Bridge Loop can bring your entire network down and stop or extremely slow down network access Read through Bridge Loop Troubleshooting
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