Dynamic Internet overlay deployment and management using the X-Bone

Abstract

The X-Bone dynamically deploys and manages Internet overlays to reduce con®guration e ort and increase network component sharing. The X-Bone discovers, con®gures, and monitors network resources to create overlays over existing IP networks. Overlays are useful for deploying overlapping virtual networks on shared infrastructure and for simplifying topology. The X-Bone extends current overlay management by adding dynamic resource discovery, deployment, and monitoring, and allows network components (hosts, routers) to participate simultaneously in multiple overlays. Its two-layer IP in IP tunneled overlays support existing applications and unmodi®ed routing, multicast, and DNS services in unmodi®ed host operating systems. This two-layer scheme uniquely supports recursive overlays, useful for fault tolerance and dynamic relocation. The X-Bone uses multicast to simplify resource discovery, and provides secure deployment as well as secure overlays. This paper presents the X-Bone architecture, and discusses its components and features, and their performance impact. Ó

Dynamic overlay routing based on available bandwidth estimation: A simulation study

“…2 The flow duration is exponentially distributed with mean F d . The selection of the source and destination nodes for the overlay flows follows a randomly generated (non-uniform) traffic matrix.…”

“…A sketch of the native network topology (also showing the location of the overlay nodes). 2 The Poisson flow arrival model is reasonable, as long as there are no correlations on bursts in the overlay flow arrival process. The Poisson model has been previously validated for application session arrivals [32].…”

“…Overlay networks have been the subject of significant research and practical interest recently [1][2][3][4][5][6][7]. The initial motivation for overlay networks was mainly due to the following three shortcomings of the IP routing infrastructure (referred to as the native network).…”

“…Those studies showed the fault recovery and performance benefits of overlay routing [1,10,11]. Another research thread focused on enhanced services that can be provided by overlay networks, such as multicasting [2,12], end-to-end QoS [6,13], secure overlay services [14], and content delivery [4]. Overlay path selection algorithms, focused on QoS-aware routing, have been studied in [13].…”

Effects of channel bandwidth variation on performance of individual messages in spatially and temporally heterogeneous communication networks

“…Realization of an overlay network involves mapping its topology onto the base network [2,3]. This mapping requires finding a "path" in the base network for each "edge" in the overlay network.…”