scope:

This service definition is compliant with the UPnP Device Architecture version 1.0. This OPTIONAL service models all layer-3 packet forwarding services applicable across all connection service instances of urn:schemas-upnp-org:device:WANDevice Generic Layer 3 packet forwarding services include all IP / layer-3 routing services. However, any such services that are configurable on a per connection instance basis, will be modeled in the context of the connection service itself. Network Address Translation (NAT) and Realm Specific IP (RSIP) are examples of such services. The service is defined to be included under the root device urn:schemas-upnp-org:device:InternetGatewayDevice