模糊cac驱动MPLS-TE实现

J. Jelinskis, A. Skrastins, G. Lauks
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引用次数: 7

摘要

MPLS- te (Multiprotocol Label Switching - Traffic Engineering Extension)是Internet工程任务组(IETF)为保证MPLS上的流量工程而引入的。然而,在MPLS-TE网络中的资源预留协议—流量工程扩展(RSVP-TE)内部的实际连接允许控制(CAC)实现并不能提供有效决策的能力,因为应用的阈值CAC缺乏考虑MPLS-TE网络节点上QoS策略的能力。这阻碍了在完全动态的、应用驱动的LSP (Label Switched Path)建立场景中有效的端到端QoS控制。本文基于模糊cac算法在RSVP-TE代理上的具体实现,提出了一种实用的模糊cac驱动MPLS-TE实现方法。在一个测试平台中,客户端应用程序通过MPLS-TE网络请求实时数据传输,从而导致动态LSP的建立和排除。根据QoS类要求和网络资源可用性,对业务请求进行允许控制。利用基于IF-THEN规则的专家知识,实现了基于流量的差别化处理。有效的流量管理是在最佳和最差的情况下实现的,因此,它验证了fuzzy-CAC作为RSVP-TE协议增强的候选,用于MPLS-TE网络和通用多协议标签交换(GMPLS)网络中应用驱动的QoS供应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fuzzy-CAC driven MPLS-TE realization
The Multiprotocol Label Switching - Traffic Engineering Extension (MPLS-TE) was introduced by the Internet Engineering Task Force (IETF) to ensure traffic engineering over MPLS. However, an actual Connection Admission Control (CAC) implementation inside the resource reservation protocol - traffic engineering extension (RSVP-TE) in MPLS-TE networks does not provide the ability of effective decision making, since the applied threshold CAC lacks of the capability to consider QoS policies on MPLS-TE network nodes. This prevents an effective end-to-end QoS control in a fully dynamic, application driven Label Switched Path (LSP) setup scenario. Current paper presents the practical fuzzy-CAC driven MPLS-TE realization, which is based on the specific implementation of fuzzy-CAC algorithm over an RSVP-TE agent. Fuzzy-CAC implementation is applied to a testbed where a client application requests a real-time data transfer through the MPLS-TE network, which results in dynamic LSP setup and exclusion. The admission control is performed upon service request based on QoS class requirements and network resource availability. The differentiated traffic treatment on per-flow basis is realized through employment of IF-THEN rule based expert knowledge. Effective traffic management is achieved in a best and worst case scenarios and thus, it validates fuzzy-CAC as a candidate for RSVP-TE protocol enhancement for application driven QoS provisioning in MPLS-TE networks and Generalized Multiprotocol Label Switching (GMPLS) networks in the nearest future.
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