Cisco 1812 Router WAN Configuration

[kgabo]

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.??

[a-vazquez]

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 .