w1051 基于mpls技術(shù)的vpn網(wǎng)絡(luò)的實現(xiàn)2

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1、摘要VPN是一種依靠ISP和其他NSP在公用網(wǎng)絡(luò)中建立專用數(shù)據(jù)網(wǎng)絡(luò)的技術(shù)。在虛擬專用網(wǎng)中，任意的兩個節(jié)點之間的連接并沒有傳統(tǒng)專用網(wǎng)絡(luò)所需的端到端的物理鏈路，而是利用某種公眾網(wǎng)的資源動態(tài)組成的，是通過特殊設(shè)計的硬件和軟件直接通過共享的IP網(wǎng)所建立的隧道來完成的。它利用了公共網(wǎng)絡(luò)做為企業(yè)骨干網(wǎng)有低成本的優(yōu)勢，通過相應(yīng)的加密和認證技術(shù)來保證用戶內(nèi)部網(wǎng)絡(luò)數(shù)據(jù)在公網(wǎng)上安全傳輸，克服了公共網(wǎng)絡(luò)缺乏保密性的弱點，真正實現(xiàn)網(wǎng)絡(luò)數(shù)據(jù)的專有性和安全性。MPLS技術(shù)屬于第三代網(wǎng)絡(luò)架構(gòu)技術(shù)，它把第2層交換技術(shù)跟第3層路由技術(shù)結(jié)合在一起，以便建立一個具有更好性能、更高穩(wěn)定性、靈活的和易于擴展

2、的高速主干網(wǎng)絡(luò)。MPLS適合于動態(tài)隧道技術(shù)，而隧道技術(shù)是目前支持VPN業(yè)務(wù)的有效手段；同時，MPLS技術(shù)通過標記可以實現(xiàn)快速數(shù)據(jù)轉(zhuǎn)發(fā)和網(wǎng)絡(luò)質(zhì)量（QoS）控制，也為VPN網(wǎng)絡(luò)帶來與眾不同的好處。本文研究的基于MPLS技術(shù)的VPN網(wǎng)絡(luò)正是利用了MPLS的動態(tài)隧道技術(shù)和網(wǎng)絡(luò)質(zhì)量控制技術(shù)來實現(xiàn)VPN網(wǎng)絡(luò)，它結(jié)合了MPLS技術(shù)和VPN網(wǎng)絡(luò)兩方面的優(yōu)點，克服了傳統(tǒng)技術(shù)構(gòu)建VPN網(wǎng)絡(luò)的缺點，極大的提高了用戶網(wǎng)絡(luò)運營和管理的靈活性，同時又能滿足用戶對網(wǎng)絡(luò)傳輸?shù)陌踩浴崟r性、寬頻帶等高性能的需求。關(guān)鍵詞：MPLS技術(shù)，VPN網(wǎng)絡(luò)，MPLS技術(shù)的VPN網(wǎng)絡(luò)5ABSTRACTVPN,s

3、upportedbyISPandotherNSP,isonetechnologywhichestablishestheprivatedatanetworkinthepublicnetwork.ActuallyintheVirtualPrivateNetwork,itdoesnothavetheend-to-endphysicallinkbetweenthetworandomnodesthatthetraditionalprivatenetworkneed.Usually,itconsistsofsomedynamicresourcesfromthepublicnet

4、workslikeatunnelwhichisestablishedthroughthesharingIPnetworkandthespeciallydesignedhardwareaswellasthesoftware.Consideringthelowercost,ittakesthepublicnetworkasbackbonenetworkinenterprises.Throughthecorrespondingencryptionandauthenticationtechniquesitmakessurethatinternalnetworkusersca

5、ntransmitthedataonlinesafely.Atthesametime,VPNhasremovedtheweakpointaboutthesecurityinthepublicnetworkwhichalsoguaranteethedata’sproprietaryandsafety.TheMPLStechnologybelongstothirdgenerationnetworkconstructiontechnology.Itcombinesthe2ndexchangetechnologywiththe3rdroutetechnologysoasto

6、buildupahigh-speednetworkthathasabetterperformance,higherstability,moreflexibilityandeasierexpansibility.MPLSshouldbeusedinthedynamictunnelwhichisaeffectivewaytocarryouttheVPNserviceatpresent.Atthesametime,theMPLStechnologymayrealizethefastdatarepeaterandthequalityofservice(QoS)control

7、s,italsobringstheoutoftheordinaryadvantagefortheVPNnetwork.WhatthearticlemainlydiscussedisrightabouttheusingofMPLSdynamictunneltechnologyandtheserviceofqualitytorealizetheVPNnetworkbasedonMPLS.ItcombinestheadvantagesofbothMPLStechnologyandtheVPNnetwork,thenovercomestheshortcomingofth