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Extra info for Advanced MPLS VPN Solutions (AMVS) 1.0
In both cases, connecting a new customer to a peer-to-peer VPN service usually requires IP renumbering inside the customer network – an operation, which most customers are reluctant to perform. The peer-to-peer VPNs based on packet filters also incur high operational costs associated with packet filter maintenance as well as performance degradation due to heavy usage of packet filters. The peer-to-peer VPNs implemented with per-customer PE-routers are easier to maintain and can give you optimum routing performance, but are usually more expensive since every customer requires a dedicated router in every POP.
25, Frame Relay, ATM) to modern IP-based solutions (GRE and IPSec). Copyright 2000, Cisco Systems, Inc. MPLS VPN Technology 2-23 The overlay VPNs, although well known and easy to implement, are harder to operate due to higher maintenance costs: ■ Every individual virtual circuit needs to be provisioned ■ Optimum routing between customer sites requires a full mesh of virtual circuits between sites ■ Bandwidth has to be provisioned on site-to-site basis. Traditional peer-to-peer VPNs are implemented with packet filters on shared PErouters or with dedicated per-customer PE-routers.
Central Services Extranet Amsterdam Service provider Extranet Infrastructure Customer A VoIP GW Customer B London VoIP GW Paris Customer C VoIP GW Service Provider Network © 2000, Cisco Systems, Inc. com Page41 This diagram shows a sample Central Services extranet implementing international Voice-over-IP service. Every customer of this service can access voice gateways in various countries, but cannot access other customers using the same service. Copyright 2000, Cisco Systems, Inc. MPLS VPN Technology 2-35 Central Services Extranet—Hybrid (Overlay + P2P) Implementation Amsterdam VoIP GW Frame Relay Infrastructure Service provider Extranet Infrastructure Provider Edge Router Frame Relay Edge switch Provider Edge Router London VoIP GW Provider Edge Router Service Provider Network © 2000, Cisco Systems, Inc.