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【正文】 EV話音 VPN普通接入點(diǎn)話音Site 1Site 2Site 3Site 4Site 5 Site 6普通上網(wǎng)Site 7， 8網(wǎng)吧間共享資源 /聯(lián)網(wǎng)游戲 /VoIP通話 /可視聊天Presentation_ID 169。IP寬帶網(wǎng)絡(luò)平臺(tái)寬帶網(wǎng)絡(luò)平臺(tái)MPLS VPN－－－－ 語(yǔ)音語(yǔ)音 /電視會(huì)議專用電視會(huì)議專用 VPN電視會(huì)議Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 40A用戶 1A用戶 2虛擬專用網(wǎng) A路由互聯(lián)網(wǎng)訪問(wèn)路由虛擬專用網(wǎng) B的部分路由增加話音 VPN 的部分路由B用戶 1IP電話 通道V網(wǎng)關(guān)PSTN/GSM 國(guó)家級(jí)長(zhǎng)途 VOIP智能軟交換關(guān)守IP電話 傳統(tǒng)電話（ 鐵通號(hào)碼） （ 鐵通號(hào)碼）互聯(lián)網(wǎng)互聯(lián)網(wǎng)訪問(wèn)電視會(huì)議用戶端設(shè)備在提供企業(yè)內(nèi)聯(lián)網(wǎng)，互聯(lián)網(wǎng)在提供企業(yè)內(nèi)聯(lián)網(wǎng)，互聯(lián)網(wǎng)訪問(wèn)業(yè)務(wù)，企業(yè)外聯(lián)網(wǎng)業(yè)務(wù)訪問(wèn)業(yè)務(wù)，企業(yè)外聯(lián)網(wǎng)業(yè)務(wù)基礎(chǔ)上，利用同一線路，統(tǒng)基礎(chǔ)上，利用同一線路，統(tǒng)一的一的 IP寬帶網(wǎng)絡(luò)平臺(tái)提供企寬帶網(wǎng)絡(luò)平臺(tái)提供企業(yè)業(yè) IP電話業(yè)務(wù)。 2023, Cisco Systems, Inc. All rights reserved. 38網(wǎng)際 MPLS VPN 業(yè)務(wù)Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 36Carrier BackbonePE1PE2CE1CE2ISP customersASBR1ASBR2ISP customersNetwork = NIPDest=NIPDest=NIPDest=NIPDest=N 3 IPDest=N 2 IPDest=N 1 6 IPDest=N 1 IPDest=N 15 IPDest=N 7 運(yùn)營(yíng)商之運(yùn)營(yíng)商CustomerISP 運(yùn)行 MPLS中竟網(wǎng) 沈陽(yáng) IGP中經(jīng)網(wǎng) 北京 IGPPresentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 34運(yùn)營(yíng)商之運(yùn)營(yíng)商業(yè)務(wù)Presentation_ID 169。務(wù)。 2023, Cisco Systems, Inc. All rights reserved. 32Inter Access Through a Dedicated Subinterface—Traffic FlowPEPESite1PEIGSite2Network CE routing tableSite2 routes Inter routes IP packetD=PE Global TableInter routes , Label=3 InterLabel = 3 IP packetD=IP packetD=Presentation_ID 169。 security issues arise.More plex Inter connectivity options (for example, full Inter routing for customers) are hard to implement.Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 29Inter Access Through Global Routing? Two implementation options:? Inter access is implemented via separate interfaces that are not placed in any VPN routing/forwarding instance (VRF) (traditional Inter access setup).? Packet leaking between a VRF and the global table is achieved through special configuration mands.Presentation_ID 169。 increased security is realized.?Drawbacks:?All Inter routes are carried as VPN routes。 2023, Cisco Systems, Inc. All rights reserved. 27Combining Inter Access with VPN Services? Two major design models:? Inter access offered through yet another VPN? Inter access offered through global routing on the PE routersPresentation_ID 169。 a security breach could occur.? Traffic can flow from customer sites to the Inter and back。 2023, Cisco Systems, Inc. All rights reserved. 25Inter Access from Every Site—Addressing? Two addressing options:? Every CE router performs NAT functionality—a small part of the public address space has to be assigned to each CE router.? The customer uses only public IP addresses in the private work—not realistic for many customers.Private addressesPublic addressesPresentation_ID 169。同時(shí)可輕松提供針對(duì)不同業(yè)務(wù)的同時(shí)可輕松提供針對(duì)不同業(yè)務(wù)的 VPN服務(wù)服務(wù)如語(yǔ)音，視頻，財(cái)務(wù)，人事等如語(yǔ)音，視頻，財(cái)務(wù)，人事等MPLS VPN 企業(yè)內(nèi)聯(lián)網(wǎng)－用戶內(nèi)部網(wǎng)絡(luò)互連企業(yè)內(nèi)聯(lián)網(wǎng)－用戶內(nèi)部網(wǎng)絡(luò)互連同一線路訪問(wèn)互聯(lián)網(wǎng)同一線路訪問(wèn)互聯(lián)網(wǎng)Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 23互聯(lián)網(wǎng)A用戶 1 A用戶 2虛擬專用網(wǎng) A路由增加互聯(lián)網(wǎng)訪問(wèn)路由互聯(lián)網(wǎng)訪問(wèn)IP寬帶寬帶 城域城域 網(wǎng)絡(luò)網(wǎng)絡(luò)用戶端設(shè)備 用戶端設(shè)備在提供企業(yè)內(nèi)聯(lián)網(wǎng)業(yè)務(wù)基礎(chǔ)上，利在提供企業(yè)內(nèi)聯(lián)網(wǎng)業(yè)務(wù)基礎(chǔ)上，利用同一線路，統(tǒng)一的用同一線路，統(tǒng)一的 IP寬帶網(wǎng)絡(luò)平寬帶網(wǎng)絡(luò)平臺(tái)提供互聯(lián)網(wǎng)訪問(wèn)業(yè)務(wù)。 2023, Cisco Systems, Inc. All rights reserved. 21互聯(lián)網(wǎng)大樓 A 小區(qū) BInter 高速接入業(yè)務(wù)高速接入業(yè)務(wù)鐵通鐵通 IP寬帶寬帶 城域城域 網(wǎng)網(wǎng)絡(luò)絡(luò)企業(yè) C學(xué)校 D互聯(lián)網(wǎng)FE/GELRE/ADSLWirelessHFC端口帶寬Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 19MPLS VPN業(yè)務(wù)及相關(guān)技術(shù)Presentation_ID 169。 2023, Cisco Systems, Inc. All rights reserved. 17全國(guó)范圍的 MPLS VPN服務(wù)業(yè)務(wù)?目標(biāo)市場(chǎng)－高端企業(yè)用戶（ ARPU值）?MPLS VPN作
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