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Topology Abstraction Service for IP-VPNs

机译：IP-VPN的拓扑抽象服务

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摘要

VPN service providers (VSP) and IP-VPN customers have traditionally maintained service demarcation boundaries between their routing and signaling entities. This has resulted in the VPNs viewing the VSP network as an opaque entity and therefore limiting any meaningful interaction between the VSP and the VPNs. The purpose of this research is to address this issue by enabling a VSP to share its core topology information with the VPNs through a novel topology abstraction (TA) service which is both practical and scalable in the context of managed IP-VPNs. TA service provides tunable visibility of state of the VSP's network leading to better VPN performance. A key challenge of the TA service is to generate TA with relevant network resource information for each VPN in an accurate and fair manner. We develop three decentralized schemes for generating TAs with different performance characteristics. These decentralized schemes achieve improved call performance, fair resource sharing for VPNs, and higher network utilization for the VSP. We validate the idea of the VPN TA service and study the performance of the proposed techniques using various simulation scenarios over several topologies.
机译：传统上，VPN服务提供商（VSP）和IP-VPN客户在其路由和信令实体之间维护服务边界。这导致VPN将VSP网络视为一个不透明的实体，因此限制了VSP和VPN之间的任何有意义的交互。这项研究的目的是通过使VSP通过新颖的拓扑抽象（TA）服务使VSP与VPN共享其核心拓扑信息来解决此问题，该服务在托管IP-VPN的上下文中既实用又可扩展。 TA服务可提供VSP网络状态的可调可见性，从而改善VPN性能。 TA服务的主要挑战是以准确，公平的方式为每个VPN生成具有相关网络资源信息的TA。我们开发了三种分散的方案来生成具有不同性能特征的TA。这些分散的方案可提高呼叫性能，VPN的公平资源共享以及VSP的更高网络利用率。我们验证了VPN TA服务的想法，并使用了几种拓扑上的各种模拟方案来研究所提出技术的性能。

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