Resource Reservation in DetNet with AVB

The Deterministic Networking (DetNet) working group of the Internet Engineering Task Force (IETF) is developing methods for building large networks with bounded latency, zero packet loss, and high reliability out of existing networking technologies. To provide strong end-to-end Quality of Service guarantees across multiple network domains, DetNet has to perform joint layer 3 and layer 2 resource reservation. The prime candidate for layer 2 technology in DetNet is Ethernet with Time-Sensitive Networking (TSN) extensions, but it is too new, and not yet fully standardized. In this paper we explore the possibilities of using Audio-Video Bridging (AVB), the precursor of TSN, as the layer 2 medium in DetNet by integrating the AVB resource reservation protocol with layer 3 reservations across multi-domain networks. We show how to match the flow identifiers and the QoS descriptors across the domains, and review the signaling steps needed to establish the connection.