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Extra resources for Advanced MPLS VPN Solutions (AMVS) 1.0
Com Page24 Each VPN paradigm has a number of benefits: ■ Overlay VPNs are well known and easy to implement, both from customer and Service Provider perspective ■ The Service Provider does not participate in customer routing in overlay VPNs, making the demarcation point between the Service Provider and the customer easier to manage. On the other hand, the peer-to-peer VPN give you: 2-20 ■ Optimum routing between customer sites without any special design or configuration effort ■ Easy provisioning of additional VPNs or customer sites, as the Service Provider only needs to provision individual sites, not the links between individual customer sites.
Com Page16 From the layer-3 perspective, the Service Provider network is invisible – the customer routers are linked with emulated point-to-point links. The routing protocol is run directly between customer routers that establish routing adjacencies and exchange routing information. The Service Provider is not aware of customer routing and has no information about customer routes. The responsibility of the Service Provider is purely the point-to-point data transport between customer sites. 2-12 Advanced MPLS VPN Solutions Copyright 2000, Cisco Systems, Inc.
MPLS VPN Technology 2-27 Overlay VPN Redundant Hub-And-Spoke Remote site (spoke) Central site (HUB) Service Provider Network Redundant Central site router Remote site (spoke) Redundant Central site router © 2000, Cisco Systems, Inc. com Page34 A typical redundant hub-and-spoke topology introduces central site redundancy (more complex topologies might also introduce router redundancy at spokes). Each remote site is linked with two central routers via two virtual circuits. The two virtual circuits can be used for load sharing or in a primary/backup configuration.
Advanced MPLS VPN Solutions (AMVS) 1.0