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Cisco 1812 Router WAN Configuration

I have question here,

Look I have an 1812 fixed router. Is it possible to configure it to connect to the Corporate Network over ATM or F/Relay network, without NAT? My corporate network and the remote sites are all using unregistered private IP, so I think I do not need NAT here. Basically I need the remote site subnet to communicate to the Central site subnet as I have done with routers with serial WAN interfaces like the 1700.

I have an STM1/OC3 link from my 7200 on the central site to the ATM network and they do F/relay to the remote sites. What is the right configs in this case? Is it PPPoe or PPPoATM with or witout NAT.??

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Re: Cisco 1812 Router WAN Configuration

Without NAt it's not possible to to connect to the corporate network over ATM or Frame Relay.For more details on network depoments refer to the link , http://www.cisco.com/en/US/products/ps5853/products_configuration_guide_chapter09186a0080458278.html

PPPoE will be a much better choice since it will be cost effective .

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