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by dep198

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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!

14 replies

by road-dog

Try the other pc's connected to the known good port. Try the good PC in other ports. This will tell you if you have bad ports on the Linksys.

Sometimes autonegotiation doesn't work well. Take one of your problem child PCs and hardcode the speed to 10/full if the router supports it. If this works, do the others.

by dep198

i thank you for the response . tried to hard code the 10/fast? not applicable or not an option from my stand point. or the the router`s stand point. my last choice is to flash the bios, to upgrade the firmware?

by amo

It problabluy is due to the network cards, the way they are configured. Make sure that the cards are in autosence mode, for both speed and mode. make up a crossover cable, setup a notebook, or whatever to be on the same network ip. use the crosover cable and ping the other unit.
if they ping then the cardss are ok. You should be looking elswhere.

by bdgray

Make sure the cables between the router and the PCs are more than 3 feet long.

by madroxxx

Why is that? I know about the maximum length requirements but is there a minimum length requirement with cat 5?

by dep198

would anybody know why i`m still getting packet loss after i test the connection and all is green p.s. by the way thank`s for the other responses

by cb.kaltelco

The fact that your "green lights " come up only shows that the pinout is right. It doesn't confirm that you have achieved cat 5 compliance. There is more to this than simple pinout. Have your cables scanned by a Pro. for cat 5 compliance.

by dep198

i tested cat 5 & tested cat5e? gigabyte. both types from two different stores w/ rj45`s from different stores. switched cable & connectors to no avail. put a tester on them , connected each pc seperatly to the router with same cat 5 same result`s ?

by cb.kaltelco

The fact that your "green lights " come up only shows that the pinout is right. It doesn't confirm that you have achieved cat 5 compliance. There is more to this than simple pinout. Have your cables scanned by a Pro. for cat 5 compliance.

by madmark

"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!

by dep198

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!!

by djent

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.

by bdgray

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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