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In highly dynamic airborne environments, per link information becomes crucial in effectively routing packets throughout the network. Point-to-point Protocol over Ethernet (PPPoE) RFC4938/5578 ¹ describes an elegant way to standardize an interface to transmit per link information to the router to make educated routing decisions. These dynamically changing point-to-point links to the router pose an interesting challenge in defining interfaces in the router configuration and providing multicast/broadcast emulation. In this paper, we present an open-source, Linux implementation of a Common Virtual Multipoint Interface (CVMI). The CVMI aggregates multiple point-to-point interfaces into a virtual interface and provides multicast/broadcast emulation on these dynamically changing interfaces. We describe our implementation in detail and show how each link can be grouped to perform differently despite the …