IP-VPN

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. A key challenge is to expose each VPN to information about available network resources through an abstraction (TA) [1] which is both accurate and fair. In [2] we proposed three decentralized schemes assuming that all the border nodes performing the abstraction have access to the entire core network topology. This assumption likely leads to over- or under-subscription. In this paper we develop centralized schemes to partition the core network capacities, and assign each partition to a specific VPN for applying the decentralized abstraction schemes presented in [2]. First, we present two schemes based on the maximum concurrent flow and the maximum multicommodity flow (MMCF) formulations. We then propose approaches to address the fairness concerns that arise when MMCF formulation is used. We present results based on extensive simulations on several topologies, and provide a comparative evaluation of the different schemes in terms of abstraction efficiency, fairness to VPNs and call performance characteristics achieved.

摘要： 本文笔者探讨了IP-VPN安全策略系统的设计原则、系统组成、安全策略的分发以及执行,具有重要的现实意义.

摘要： 本文针对远程用户数量对IP VPN网络服务器及隧道性能进行分析,并使用OPNET网络仿真软件对两个场景进行建模仿真,通过对比两个仿真结果,可以得出远程登录的用户数量和业务量的增加不会显著地影响VPN的隧道延迟,IP VPN的性能不受影响.

摘要： IPVPN技术对于企业的通信的重要性如何？中小企业如何部署合适的IPVPN架构？这两个问题仍旧是企业最为关心的。其实，应用MPLS技术架设VPN的优越性已经成为很多企业的共识，它具有很高的扩充性，中小企业可从自身业务发展方向出发，架设最具成效的MPLSVPN（简称MPLS专线）。

摘要： For the purpose of establishing a virtual network on the IP network to cut the operating costs and reduce the unnecessary middle cycles of sales, realizing the non face-to-face immediate transactions with the online information and identity confirmation, the paper provided a secure, dependable and manageable way of realizing the virtual network which exclusively established a logical database channel for clients in MPLS VPN. Via the tests on the MPLS VPN's capability,dependability, security and the effect of cost reduction, it proved that businesses could receive prompt and accurate information based on the low-cost, highly capable and resource-efficient electronic information platform or E-commerce platform.%基于企业在IP网上建立专用虚拟网络,降低运营成本,减少销售中间环节,实现非面对面的实时交易,确认网上信息和身份真实性之目的,给出了在MRS VPN网上为用户建立专用的逻辑数据通道,构建一种安全、可靠、可管理的虚拟专用网络的实现方法.通过进行MPLS VPN的高性能、高可靠性、安全机制和低成本的实验,得出了企业可得到及时准确的信息,拥有低成本、高性能、资源合理利用的电子信息平台或电子商务平台的结论.

摘要： Orange公司近日在京举办了一场以”云计算”为主题的媒体推介会。会上，Orange Business Services全球服务部高级副总裁Didier Jaubert表示，该公司已经在整个亚太地区投入了大量的精力，中国是Orange一个不能忽略的市场，Orange Business Services已经与中国电信和中国联通建立了网络到网络的接口，可为国内约200座城市提供IPVPN接人。

摘要： 本刊讯日前，铁通公司在北京举办2010年增值业务现场培训推广会。四川铁通组织3名优秀的一线营销人员赴北京参与推广、交流。会上，四川铁通参会人员就互联网专线、IPVPN、智控眼、数据快线、互联网增值业务等重点业务的营销组织、业务管理、

摘要： 随着国民经济和社会信息化的不断发展,企业信息化建设越来越受到各企业的重视.利用IPVPN技术组建企业内部网络不仅成本低,而且安全性高,从而使IPVPN技术在各企业中得到越来越广泛的应用.本文重点就IPVPN技术的特点及实现方式进行了简单的描述.

摘要： 本发明涉及网络通信技术，具体的说，是一种实现MPLS VPN运行在加密的IP VPN之上的方法。目前没有现成的解决点对点对原始二层报文进行加密跨越IP公网进行透传的技术，本发明提供一种技术能将原始的二层报文进行加密后，使用IP VPN在运营商的IP网络上进行透明传送，安全的实现客户二层报文跨运营商网络的点对点传送。本发明将二层VPWS的MPLS标签引入GRE封装，且对GRE报文做IPSEC加密，使二层数据报文能够透明的跨越三层网络传送到远端，且该传送过程是加密的，满足了业务传送的透明性与安全性。