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Network Hub Problem

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by spider-man

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I have a network here at the office I work at that I take care of. This is a Windows 2000 Server Network with 3 Win98 computers, 1 Win2000 computer, and 1 WinME computer. I have two hubs on this network, a DSL router, and an HP Printer with HPJetDirect. The WinME computer has an HP NIC card, two Win98 computers have a Linksys card, the server has a linksys card, and the Win98 and Win2000 computers have generic cards. All of these cards are 10/100 cards. The DSL router is 10 MB/s and so is the HP printer. One of the hubs is a Linksys 10BaseT and the other hub is a Linksys 10/100.

I am running a NetBEUI network on the server for our LAN. I am running a TCP/IP network just for internet use. Also the printer is on the network with a TCP/IPconnection through the 10 hub to the server. I am attempting to do away with the 10BaseT hub and go to the newer 10/100 AUTOSENSING hub. When I do this, only the server and one win98 machine with linksys card work. What I mean by work is that they connect and the network/internet works fine with no problems. However, when I plug in any of the other computers to the new hub, they read as 100 and it shows this on the card and the hub, but my network does not work. These computers can not see the network or the server. The DSL router is connected to the new hub with a crosslink cable and works fine. The old hub is now plugged into the uplink port on the new hub. I also have all of the computers that will not work on the 10/100 hub plugged into the 10 hub. If at all possible, I would like to plug them all into the new hub and do away with the old hub. Network is working fine as is, only have problems when attempting to do away with old hub.

Thanks in advance!

8 replies

by simon.donohue

In relation to the problem regarding the hub reading the cards as 100, try changing the cards to read as 10. The card might be set to a default setting which sometimes can cause these problems. If you specify 10 Base T (by going to the NIC properties - it should be in there somewhere).

Hope this helps.

by william

Here are a couple of tips,
1. Double check you nics. Make sure that they are 10/100.
Gateway advertized a pc with an intergrated 10/100 nic that I worked with but after many hours of frustration and many emails with Gateway, they tell me that the nic is only 10mb.
2. Double check your network cables. Get a cable tester. Make sure that your cables aren't running next to electricity cables.
Make sure your cables are made properly according to the cat5 specifications.
3. See if you nics are on autosense, put hem on 100 or on 10. Try different settings.
Make sure the cable that you are using is cat5.
4. You may want to give every pc in your office the same operating system. This makes your job easier.
Hope these tips help.
Good Luck!

by shanghai sam

Check your cables. If nothing but the hub has changed, I am 99.9999% confident that your cabling is the problem.

If you can, Run a factory made patch cable from the PC directly to the hub and see if that works. If that is not an option, forceyour NIC to connect at 10Mb and I bet it works.

What is going on here is one of two things:

Possibility 1:
The pairs on your cabling are split. If you can check the pinout You probably have something like this:

1 - orange/white
2 - orange
3 - blue/white
4 - blue
5 - green/white
6 - green
7 - brown/white
8 - brown

Or some other color scheme that is pairint pins 1&2, 3&4, 5&6, 7&8 This will work fine, though wrong, for 10BaseT but not for 100BaseT.

For 10/100/1000 Baset Ethernet there are 4 wires of the 8 that matter. THey are pins 1-2-3-6. The others don't even have to be there.

Pins 1&2 are a Pair and MUST share 1 of the twisted pairs. (ie: orange/white and orange) and 3&6 MUST be a pair and share another 1 of the Twisted Pairs. ie: (ie:green/white and Green)

If that is not the problem, then your wireing is most likely category 3 or possibly, but unlikely Category 4. (I say unlikely because Cat4 lasted about a day and a half before 5 replaced it)(slightly facetious)

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