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cable modem config

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6 replies

by rsarvis

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We have two isp lines coming into our building. One a 56K, the other a cable modem. The cable modem is not connected and I would like to connect it. We do not have a server setup, just a frame relay. Can I connect the cable moden to a hub then connect the internet computers we to the hub? If not, what would I need to make the connections so that I can utilize the cable modem. Thanks in advance.

6 replies

by cclark

What you will need is a device (router) that can provide NAT. This will allow your internal PC's access to the outside. You will also have to change your routing to determine where traffic goes, out the cable modem or through your frame link. Look at your frame relay router, it should be able to do NAT.

by rsarvis

The hub I have to use is one that I inherited with the system. There is not documentation and I see no reference to
NAT. The hub is a Synoptics LattisHub 2803 and it appears to be from Bay Networks. It has a terminal port (10 pins), Expansion port (25 pin), MDI-X/MDI switch, AUI port and 16 RJ45 connect ports. Is this the one?

by mshavrov

At first you need ISP where you can connect your cable modem. It's nothing you can configure in the modem. Secontary, you will need router which will perform NAT (see answer #1). ISP will provide you with ONE IP address for your connection and cheapest colution is to buy Cable Modem Router for 70-140$ and connect it to your MDI-X port on Hub. When choose this router check how many computers can it support. Cheapest can have only few connections. Another thing is that this router will hide your internal network and you will appear for Internet as one IP address.

Best regards,

Mike

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