Why can’t I connect to the Internet through my new GBIC module?

1545 pts.
Tags:
AT&T
fiber
Fiber Ports
GBIC
Linksys switch
MDF rack
Network equipment
Networking
Patch panels
Routing and switching
On the MDF Rack is a Linksys switch that has 24 ports with two mini gigabit interface converter (GBIC) modules: One GBIC module port states up to 12; the other port states up to 24. [o:p][/o:p]

Also, there are two fiber patch panels with 12-pair wires connected to Ports 1-2 3-4 5-6 7-8 9-10 11-12 on one patch panel. The other is numbered 13-14 15-16 17-18 19-20 21-22 23-24 with the 12-pair wire. The upper panel is marked for IDF 1 and the lower for IDF 2. First, I connected the two panels together. Then I connected the 1-2 port to the patch on the GBICs module labeled "Up to 12" port on the switch.[o:p][/o:p]

 

On the IDF Rack 1, I connected from the 1-2 fiber port a fiber patch to the GBIC module labeled "Up to 12" on the switch. When I connected a PC to the switch with the GBIC module I was not able to connect to the AT&T Demarc and access the Internet. There was no connection from the IDF to the MDF through the fiber connection. The two switches are new and work since I tested them with a copper uplink. I don't know what the problem with the fiber is. The fiber patches and fiber cable was recently installed and tested by a professional installer.[o:p][/o:p]

Answer Wiki

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IDF1 patch panel should lead to patch panels in another switch closet and the same with IDF2. You would not connect these two panels to each other. You would need to determine if devices were attached at the other end in the IDF’s. Then connect the appropriate pairs to fiber interfaces on the switch or convert from fiber to copper and connect into standard RJ45 switch ports. In other words, there should be another LAN switch in IDF1 with fiber connections to ports 1/2 which then connect in the MDF to a GBIC on the main switch.

Do you have any connection between the Linksys switch and the WAN router? You need to have a path from the LAN to the internet. You cannot connect the LAN switch to the T1 jack from AT&T. The T1 link should go to a router. It sounds like you need to work with a local network consultant for a quick effort on getting this all configured and properly secured. There is a lot of troubleshooting here that would be much easier with hands-on and eyes-on local support. We will be glad to help, but this may be a bit more difficult if you have never built a LAN/WAN with these types of interconnections. We all started somewhere, and it is usually best to have a local partner to work with and get some on-the-job-training for something like this.

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