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connecting 2 WAN sites

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by gsinclair

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I have 2 WAN sites connected by 2 routers. Each having 1 serial & 1 ethernet ports. I am changing my WAN provider that connects via the serial interfaces
to one that requires just a ethernet port link at both ends. Can I use the same routers to do this this physical connection? If so how will it work.

Thanks for ur reply.

4 replies

by zen37

I'm afraid not, you will need new routers with 2 ethernet interfaces.

But, if your routers have modules, you may be only required to purchase 2 ethernet modules, one for each.

by exnn

it will depend in the brand and model of your routers. If you are able to add a WAN ethernet interface, it will be just a matter of configuring IP and routing for the new interfaces as you have Serials now. Please provide more info about your HW.

by acattr

its not recommended to use the same interface for both your wan and lan. But if you have a cisco router, what you can do is create subinterfaces in your configuration. This will work.

by unclegeorge

Nope, but those serial interfaces can be connected directly via cross-over. If you have a WAN sniffer, tapping into this circuit can be instructive as you configure various WAN protocols and watch the traffic. You could, I suppose, set up a pair of such routers and end up with the two necessary ethernet ports --- but only at one end, the other would need two ether ports as well. Funny lashup, but it would work.

Best, UncleG

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