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cabling

By dep198 ·
i`m networking 4 pc`s w/ a lyncsys router, i ran cat 5 cable & attached rj45 connectors to the leads. i`m getting green lights from the router for all the pc`s . 1 pc works when i ping the router, 1 pc has packet loss and 1 has timed out displayed. i re - stripped the cabling & did it again. still getting the same results, i dont think its the length of the cable because it`s less than a 100m i`m left with the idea of bad network card`s or bad cat 5 or maybe the router is bad i just bought a tester to test the connection`s but if the tester gives me green lights . i`m up against a wall. running out of solutions. anybody!

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Most likely cabling issue

by MadMark In reply to cabling

"i ran cat 5 cable & attached rj45 connectors to the leads"
-Buy pre-made certified CAT5 cable if you are unfamiliar with crimping techniques. I say this as many cables are made quickly, and are improperly grounded, shielded or untwisted for ease of installation. They introduce noise and cause many hard to cure issues.

"i`m getting green lights from the router for all the pc`s"
-This indicates that there is an electric current that is connected at both ends. Does not indicate the quality of the connection.

"1 pc works when i ping the router, 1 pc has packet loss and 1 has timed out displayed."
-Use the connection that has success for subsequent tests. Move the cable to one of the other PC's. What are the results? Move the same cable to another port on the router. Test again.

If the second PC now passes the test, repeat on the other PC. If it too passes, then you have a bad cable. If they fail, you have to examine the NIC settings for differences. Are they all using the same Operating System? NIC? Common things to try: Set the MTU to 1500. Set the speed to 10MBit (not auto-detect). Set the duplex option to HALF (not full or auto-detect). If you have a spare NIC, try installing it and retesting above.Good luck!

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packet loss

by dep198 In reply to Most likely cabling issue

used different cables on different machines 1 worked ok switched it to another pc got time out`s used another cable worked fine. pinged 2 or 3 times different reply`s on the machine`s, going crazy!!

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by djent In reply to packet loss

Have you tried a crossover cable or replaced the router with Known good hub? The crossover will confirm NIC and config function, if it works on each PC. If you pass that test then try a known good hub or switch, if that works the router has problems.

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Speed

by bdgray In reply to packet loss

You may need to force the connnection speed rather than letting it auto detect. Try manually setting to 100Mb on the card. If your switch is manageable force the port connected to this PC to 100Mb as well.

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