FAQ - Frequently Asked Questions/Troubleshooting

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Before you start reading this section, make sure that your computer has correct setup, see previous section of this document. The following text is intented for those, who has well functioning connection and suddenly they experienced malfunction of net. In the answers the possibility of wrong setup is not considered.

How do I know, that net doesn't work and what should I do in case it happens?

Try to run program ping on your PC with command: ping IP_gateway, where IP_gateway is IP address of router (gateway), that you are connected. This program sends data to the given address and checks what returns. If you see in output ...100% lost... or linex with ...Request Timed Out..., it means that the destination PC cannot be reached from your computer -- referred as pinging. You can download utility pinger, created by one strahov administrator, that tests the most important routers on Strahov. The following table assumes, that in time when the net went down you were not making any changes in internet setup. Other prerequisite is that your roomate's connection is working. For testing pings usi only numerical IP addresses and not hostnames! Service for of domain name translation could be inaccessible during the net is down.

I
my roomate
my friend on other block
pings
me my roomate my gateway world
NO Wrong driver of network intarface card
YES NO NO NO Breakdown of switch. Wait a few minutes, it can be drop-out because of maintenance. After a while ask your televisor, if he/she could fix the problem. At first control, if you're connected to the proper (left/right) connector.
NO YES NO NO
NO NO YES YES
YES NO NO NO Net is well working, but you are disconnected. Please control your cable, if it is properly connected to the connector of your PC and on the wall. Also make sure, that the address of network card (MAC) is the one that you gave to admin. Check if your cable is connected to the right/left connector on the wall, because it cannot be swapped. Also check the power cable to your PC (Modern switches detect irregularities of signal and can disconnect the host in case of power fluctuation).
NO YES YES YES
NO YES YES YES
YES YES NO NO Net is working, but you are administratively disconnected. Probably you forgot to pay for internet, changed your network card, or done something prohibited and your admin disconnected you. Visit your administrator and he/she will help you to find out what's the problem.
NO YES YES YES
NO YES YES YES
YES YES NO NO
NO NO NO YES
YES YES YES NO
NO NO NO YES
YES YES YES NO Failure of connection of Strahov net to the world. There's nothing to do, admins must be solving the problem. Check out the information on localnews.
YES YES YES NO
YES YES YES NO
YES YES YES YES

Most probalby the setup of PC is wrong, see section [#www www], or there's a blackout of one DNS, www server or cache. There's nothing to do, admins should work out the solution.

YES YES YES YES
YES YES YES YES
Though it is impossilbe to reach the pages relevant to the given address.


Connection with the school's Novell-type server doesn't work, what should I do?

Old Novel servers where connected via protocol IPX, which is not supported by new CISCO routers (used at Strahov). Nowadays it is not possible to connect by Novell Netware to the school, if the server in schools uses this service by IPX protocol. Servers Novell are gradually converted to IP protocol, but the situation at school's servers is not mapped yet. If you want to transfer some files from school try protocol FTP. Spread of IPX at Strahov is not planned in future.

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