Abstract
A Virtual Private Network (VPN) is a solution that provides corporate networking between geographically dispersed sites. VPN sites consist of local area networks (LANs). Their interconnection is based on a public network infrastructure. Links connecting VPN sites are allocated with a peak rate and the VPN customer pays for the reserved bandwidth. The goal of this work is to develop a control model able to manage traffic on these links. By maximizing bandwidth utilization, an optimum balance for the allocation of bandwidth on each link can be found. To respond to such needs, we propose to introduce in each LAN of the VPN a control architecture that we call The Hierarchical Bandwidth Manager. This manager is able to cope with best-effort and guaranteed flows so that bandwidth left unused by guaranteed flows is dynamically distributed among best-effort ones. It uses a tree representation of the LAN nodes and regulation of link bandwidth is done in a hierarchical and distributed manner. Each node in the tree respects either an inter-node bandwidth share protocol or an intra-host regulation protocol. The bandwidth manager relies on the implementation of both protocols in the tree node. Results of the implementation of the bandwidth manager in the ns network simulator are described in this paper.
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© 2000 IFIP International Federation for Information Processing
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Lamti, L. (2000). A Traffic Management Model for Virtual Private Network Links. In: Touch, J.D., Sterbenz, J.P.G. (eds) Protocols for High-Speed Networks VI. PfHSN 1999. IFIP — The International Federation for Information Processing, vol 31. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35580-1_12
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DOI: https://doi.org/10.1007/978-0-387-35580-1_12
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