WE-bridge: West-east bridge for SDN inter-domain network peering

Abstract

Software defined networking (SDN) [1] works as a centralized control model. However, the Internet is managed by owners of different domains, which makes the centralized control does not work for inter-domain Controlling the flow of data packets in a global network requires each NOS (Network Operating System) to have a relative global network view to determine the next NOS hop. Hence, NOSes are required to exchange reachability and topology information between the inter-domain networks. How such information is efficiently exchanged has not been well addressed so far. Thus, this demo proposes a West-East Bridge (WE-Bridge) mechanism for different SDN administrative domains to peer and cooperate with each other: (1) we design a peer-to-peer based high performance network information exchange mechanism. We define what network information should be exchanged and how such information is efficiently exchanged among inter-domain SDN peers. (2) To achieve a resilient peer-to-peer control plane of heterogeneous NOSes, we propose a `maximum connection degree' based connection algorithm [4]. (3) Considering the privacy, we propose to virtualize the SDN network view, and only exchange the virtualized network view to construct the relative global network view. Applications above WE-Bridge carry out the route translation, calculation, and installation.