Description: This variable describes the external type of metric that the export policy will advertise an external route as. Essentially this variable determines if the E Bit in an AS External Links Advertisement is set or not. A selection of external type II will cause the E bit to be set to 1. An external route tagged as an external type II indicates that the external cost to the route is all that should be associated with it's cost metric. A route tagged as external type I indicates that the internal cost to the Autonomous System Border Router as well as the external cost of the route should be associated with the route's cost metric.