10-132 User’s Reference GuideIf you do not specify the Remote Tunnel Endpoint Address, the router will use the default gateway to reachthe partner. If the partner should be reached via an alternate port (for example, the LAN instead of theWAN), the Next Hop Gateway field allows this path to be resolved.Interoperation with other features Address serving is not supported through IPsec Tunnels. AH is not supported through an interface that has NAT applied to it. NAT may be applied to the innerpayload. AH is not supported through an interface which is either Unnumbered or Numbered with a dynamicallyassigned address unless the Local Tunnel Endpoint address is specified in the Advanced IP Profile Optionsscreen.About ATMP TunnelsTo set up an ATMP tunnel, you create a Connection Profile including the IP address and other relevantinformation for the remote ATMP partner. ATMP uses the terminology of a foreign agent that initiates tunnelsand a home agent that terminates them. You use the same procedure to initiate or terminate an ATMP tunnel.Used in this way, the terms initiate and terminate mean the beginning and end of the tunnel; they do not meanactivate and deactivate.ATMP is a tunneling protocol, with two basic aspects. Tunnels are created and torn down using a sessionprotocol that is UDP-based. User (or client) data is transferred across the tunnel by encapsulating the clientdata within Generic Routing Encapsulation (GRE). The GRE data is then routed using standard methods.ATMP configurationATMP is a Datalink Encapsulation option in Connection Profiles. It is not an option in device or link configurationscreens, since ATMP is not a native encapsulation. The Easy Setup Profile does not offer ATMP datalinkencapsulation. See the User’s Reference Guide for information on creating Connection Profiles.The WAN Event History screens will report VPN tunnel events, such as connections and disconnections, asChannel 4 (and higher) events.To define an ATMP tunnel, navigate to the Add Connection Profile menu from the Main Menu.MainMenuWANConfigurationAdd ConnectionProfile
