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Resolved Question

Cable Internet hook up issues

Sep 26, 2013 3:56AM PDT

I have an Arris TM228 cable modem, Net Gear WNDR3700-100NA router and Net Gear FS116 (no E) LAN switch. If I hook modem to router and router to server I can get internet only on the server not to other computers on the network. If I hook modem to router, router to LAN switch and server to LAN switch I can't get internet on anything. If I use existing AT&T modem/router in one hooked to LAN switch everyone has internet. I have tried every configuration of cable to switch hook ups I can find and nothing works. The cable company says since it works when hooked directly to server it is something on my end and they aren't responsible. I have been working on this for 3 days. I am computer literate and can do a lot of things but don't have much knowledge of networks and switches.

The Server Windows IP Configuration when AT&T Modem is connected is:

Ethernet adapter Local Area Connection 2:
Media State : Media disconnected
Connection-specific DNS S u f f i x . :
Ethernet adapter Local Area Connection:
Connection-specific DNS S u f f i x . : sbcglobal.net
Link-local IPv6 Address : fe80::a032:d3ba:35d7:60b5%ll
IPv4 Address : 192.168.1.29
Subnet Mask : 255.255.255.0
Default Gateway : 192.168.1.254
Tunnel adapter Local Area connection- 8:
Media State : Media disconnected
Connection-specific DNS S u f f i x . :
Tunnel adapter Local Area Connection- 9:
Connection-specific DNS S u f f i x . :
IPv6 Address : 2001Shocked:9d38:6abd:103f:lb4b:3f57:fee2
Link-local IPv6 Address : fe80::103f:lb4b:3f57:fee2%10
Default Gateway : ::
Tunnel adapter Local Area Connection- 11:
Media State : Media disconnected
Connection-specific DNS S u f f i x . : sbcglobal.net
C:\windows\system32>

Can anyone give me guidance? PLEASE

Discussion is locked

jwilsoncimco has chosen the best answer to their question. View answer
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Clarification Request
(NT) So you have ATT and another cable company?
Sep 26, 2013 2:28PM PDT
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PS. Huzzah.
Sep 26, 2013 3:13PM PDT

I just looked and at home I have some Arris cable modem (not ATT service) and the Netgear wndr3800 so we should be able to compare notes.

Here it works great.

" If I hook modem to router, router to LAN switch and server to LAN switch I can't get internet on anything."

Try something directly to the router but keep in mind that we must power off/on the cable modem when we change what attaches to it's LAN port.
Bob

Best Answer

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Cable Internet hook up issues
Sep 26, 2013 7:08PM PDT

have you checked the configuration of your switch?

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Solved
Sep 27, 2013 12:31AM PDT

Turns out there were multiple problems causing the issue. So just in case someone else runs into this -
The Network card in server was failing intermittently so we switched to the second network card. Once that was solved we were able to determine that an old modem (affiliated with SBC Global) was being used as a switch between computers. Once we removed that and replaced it with a regular switch everything worked. We are now flying along with cable internet.

Thanks for your responses!!