Home Networking Question?

Question

I have a networking issue at my home. I have 6 comps that I want connected to a cable internet connection. Just reread if you dont understand.

The cable line comes into the house and is recieved to a cable modem. The Cable modem connects to Router#1. Router #1 has three connections on it. The three connections are to Comp #1, Comp #2 and to Router #2. Comp #1 and Comp #2 have internet.

Router #2 has three connections. Comp #3, Comp #4 and Router #3. Comp #3 and Comp #4 have internet.

Router #3 is were the problems begin. Router #3 has Comp #5 and Comp #6 to it. Comp #5 and Comp #6 are connected to each other via share files and lan games, but they can not connect to the Internet like all the other computers can. If I take the internet wire out of Router#3 and put it in Comp #5 I will have internet. I need help getting Router#3 gain internet.

Also all wiring is in the walls, thats why i need all the routers as multiple comps are in different rooms.

Thanks

Answer 1

it could be a number of things. props to the person who said swap router #2 and #3 and see if the issue lies in the router. that's how you troubleshoot. but i have a feeling it is ip conflict. you get an ip address from your isp, then router #1 gets an ip address and gives out ip addresses to the computers. but also, routers 2 and 3 have ip addresses. the default settings on these routers may be conflicting. If you are using DHCP which you probably are, cause that's the way most things are set up, you want to make sure that routers 2 and 3 get their own unique ip address, and that router #1 is giving ip address from a range that does not include the addresses that each router has.
for instance, router #1 should be 192.168.1.1, router #2 should be 192.168.1.2, and #3 should be 192.168.1.3, and have router #1 pass out addresses in the range of 192.168.2.100 through 192.168.2.150.
routers 2 and 3 both have to be configured not to act as routers but as switches. all your computers 1-6 should be getting their ip addresses from router #1 and not 2 or 3. you might have to go into the setting of those routers and turn off DHCP.
also, the cable has to be in the right hole. all routers are different, but on mine, hole #1 is designated for the uplink. so on my router #2 (i only use 2) the cable runs from hole #4 on router #1 to hole #1 on router #2. On mine, there's 5 holes total. one is seperated to the left and labled WAN. this is normally the one you would connect to the cable modem. but if you are connecting it to router #1, this hole must remain open and you use hole#1 to connect it. this hole is designed for the purpose of plugging into another router. Also, on mine, there is an "uplink" button, which I could swear was put on backwards cause it only works when it's not pushed but it's only supposed to work when pushed. so play with that.

Answer 2

It's more than likely the problem has to do with router #3s settings. You said computer #5 and #6 are able to communicate, so it's a safe assumption that they are configured correctly.

Are you able to ping router #3 from computer #5 and #6? If not they might not be in the same subnet as the router ... if you are:

Are you able to ping router #3 from router #2? If not they might not be in the same subnet (the interfaces facing each other will need to be in the same subnet as computer #3 and #4) ... if yes:

Are you able to ping router #3 from router #1? If not, the default gateway might be configured incorrectly on router #3 ... it should be pointing to the interface on router #2 that is connected to it (the same default gateway as computer #3 and #4)

Running through these questions should bring you to your problem.

Answer 3

Fisrt it would be better if you just used simple switches or hubs instead of router #2 and #3.

It sounds like to me you have not disabled DHCP in the third router. Try that.

Or you could have run out of IP addresses that router #1 gives out. Make sure you have the IP range sufficient for the number of computers you are connecting.

Answer 4

- look into the configuration of router 3. most probably the problem is there.
- comp 5 and 6 might be getting overlapping IPs which is preventing them to get to internet.
- i would suggest getting 1 wireless router and plug it to the cable modem. from there use wireless cards for all the PCs

Answer 5

Swap router 2 & 3 and see if you have the same problems on the same computers. Let's find out if this is an issue with the router, or if it's a configuration problem. If it's a configuration problem make sure your router is configured with gateway, etc..

Answer 6

first why don't get wirless

never mind

use the windows wizerd for reinstall the connection there is no problem in wires

except if you don't know there is a diffrent wire between router and router than the one between router and pc