A policy based QoS management system for the IntServ/DiffServ based Internet

Proceedings Third International Workshop on Policies for Distributed Systems and Networks Pub Date : 2002-06-05 DOI:10.1109/POLICY.2002.1011303

Appan Ponnappan, L. Yang, R. Pillai, Peter Braun, Peter Braun

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引用次数: 57

Abstract

This paper reports the design, implementation, and performance evaluation of a policy based QoS management system for the IntServ/DiffServ based Internet which is based on COPS for interfacing with the network device and on LDAP for interfacing with a directory for storing policies. The design is based on distributed components and CORBA is used as a middleware for component interaction. The Diffserv policies are installed based on the role combination assigned to the network device interfaces and policy caching is used to improve the performance. The feasibility and performance of managing and deploying IntServ and Diffserv, policies for QoS management is demonstrated using Linux-based routers. The preliminary performance measurements show that the policy server response time is below 5 ms per request for 20 COPS-RSVP requests per second. COPS-PR processing takes more time compared to COPS-RSVP requests. It is found that the directory access could become a bottleneck in scaling the performance of the policy server and it can be improved substantially by employing appropriate policy caching mechanisms.

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基于IntServ/DiffServ的Internet的基于策略的QoS管理系统

本文报道了基于IntServ/DiffServ的基于策略的QoS管理系统的设计、实现和性能评估，该系统基于COPS与网络设备接口，基于LDAP与存储策略的目录接口。该设计基于分布式组件，使用CORBA作为组件交互的中间件。Diffserv策略是根据分配给网络设备接口的角色组合来安装的，并且使用策略缓存来提高性能。利用基于linux的路由器验证了管理和部署IntServ和Diffserv策略进行QoS管理的可行性和性能。初步性能测量表明，对于每秒20个cop - rsvp请求，策略服务器响应时间低于5 ms。与COPS-RSVP请求相比，COPS-PR处理需要更多的时间。研究发现，目录访问可能成为扩展策略服务器性能的瓶颈，通过采用适当的策略缓存机制可以大大改善这一瓶颈。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings Third International Workshop on Policies for Distributed Systems and Networks

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