Network Issue.

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Tags:
Cabling
Hardware
Hubs
Networking
NIC
Routers
Switches
Hi. I am running a network, and have setup a small room with 12 PC's. The room is gonna be used for research, but there is only 1 network port coming in (10meg. So, i have a 8 port hub, and a small switch. 8 of my PC's are on the network,, on the hub, but the other 4 are not. I get a link light on the switch, and when i plug any of the 4 that do not work onto the hub, they work. Any ideas where i have gone wrong??
ASKED: January 12, 2006  11:16 AM
UPDATED: January 19, 2006  1:20 PM

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sounds like you have the hub hooked to the cat 5 coming into room and switch downline of hub….this is backwards

hook switch to cat 5 outlet and then hub downline of the switch…..also, depending on your other network configuration, you may need to dumb down the switch to merely act as hub.

depending on your requirements, you may find it easier to assign manual IP addresses on the LAN for these puters.

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  • SeethingGrey
    I am confused. You say you have 12 PC's and only 1 network port. But then you say you have 8 working and 4 not. The eight that are working are in the hub, which is plugged into the network port. The four that are not working I assume are plugged into the switch. What is the switch plugged into? Please outline how *exactly* you have everything connected. Please be specific as to whta ports on the hub and switch and the model of the hub and switch.
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  • HumbleNetAdmin
    How old is the hub, does it have link port it. Most hubs/switches today handle uplinks (connect hub to hub or switch) to each other automaticaly or have an uplink button on them (change a specific port from standard to uplink). Basicaly when you connect switch or hub to each other it takes a cross over cable if the switch or hub does not handle the crossover automaticaly. Or you simply have a bad hub, is it know to be good. I think that it is likely that you need a cross over cable between the hub and switch The humble netadmin
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  • DrillO
    MGREGORY is correct.....switch first then hub. More detail would help us help you, but I think if you turn things around you will be up and running. Let us know how you make out. Best, Paul
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  • Joco1141
    it sounds like your hub has a uplink port which is your eighth port. you can only hook up 7 computers to the hub and use the eighth port as the uplink to the switch and then plug the rest of the computers into it. that should fix you
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  • Ladrick
    a. 8 port hub 1 port is uplink - swap the ports around b. swap the hub and the switch over c. use a crossover cable to connect switch to hub
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  • Carl0s81
    cheers for all the reply's. Ok, Cat5 comes in and connects to the link (1 of 2) on the hub which is at the back. i put the second link into port 8 (link) of the switch. The hub has got 8 ports on the front and all these work. There are 8 PC's plugged into the hub and so all work. the other 4 are plugged into the switch and do not work. I have vhecked all the settings on the client side. I'll try the swap round (Sitch for hub) and see if that makes a difference.
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  • Paul144hart
    Look at the switch config - if its smart enough, you may need to configure it for DCHP use. If the last user used fixed IP addresses it won't work in what I assume is a DHCP network. If you do have an admin console, query for what it thinks is the next hop, and trying pinging things. This should lead you down the road to finding what is the hold up. (Yes switch should be first, but that for performance reasons, you should be able to forward DHCP requests throug it)
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  • SKMEHAB
    If i have correctly understood your problem then the scenario is that you have 7 PCs connected to Hub and Switch is connected on one port of Hub and then rest of the 5 PCs are connected on Switch. How many Ports you have on switch?
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  • ComputerSolutions77
    Stop fooling around. Buy a 16 port SWITCH. Be sure the INCOMING wire is plugged into the UPLINK port or the UPLINK button is set (most of the new switches will have AUTODETECT). Fix the cabling or remote switch to do at least 100 mbps. Goos luck. Bill
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  • Carl0s81
    ok, Meaning to update this for days now, works internet playing up too much though. Filled the switch and then started using the hub and now working. I had to re-image the non working cleint PC's and rename, and then re-install the network adapter, and.... 3 adapters were loose... (hangs head...) Cheers for all the help. FYI. Switch had 8 ports, but no.8 was uplink. The hub had two link ports at the back. All sorted now so no probs.
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