Non-MPLS Peer-to-Peer Model: Characteristics and Benefits

Characteristics of Non-MPLS Peer-to-Peer Model

Q: Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model? (Choose two.)

Provider routers know the customer network topology.Routing information is exchanged between the customer router and one or a few PEs.

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Question

Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model? (Choose two.)

Answers

A. The model is suited for nonredundant configurations.

B. The configuration on a newly added site PE is updated automatically.

C. Provider routers know the customer network topology.

D. The customer specifies the exact site-to-site traffic profile.

E. Routing information is exchanged between the customer router and one or a few PEs.

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Explanations

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A. B. C. D. E.

CE.

http://etutorials.org/Networking/MPLS+VPN+Architectures/Part+2+MPLS-based+Virtual+Private+Networks/Chapter+7.+Virtual+Private+Network+VPN

In a traditional MPLS overlay model, a VPN customer's sites connect to a service provider's MPLS network through a set of customer edge (CE) routers and provider edge (PE) routers. In this model, the service provider's core network acts as an overlay, providing connectivity between the customer's sites. The service provider's PEs maintain a complete view of the customer's VPN topology and exchange VPN routing information with other PEs via MP-BGP.

In contrast, a non-MPLS peer-to-peer model does not rely on MPLS to provide VPN connectivity. Instead, the customer's sites connect to each other directly, using a non-MPLS transport technology such as IPsec or GRE. This model is often used for simpler, less complex VPN deployments where the customer has a small number of sites and wants to avoid the overhead of MPLS.

The two characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model are:

The customer specifies the exact site-to-site traffic profile: In a non-MPLS peer-to-peer model, the customer has more control over the routing of traffic between sites. The customer can choose which sites communicate with each other and can specify the path that traffic takes between those sites. This is in contrast to a traditional MPLS overlay model, where the service provider's PEs maintain a complete view of the customer's VPN topology and handle the routing of traffic between sites.
Routing information is exchanged between the customer router and one or a few PEs: In a non-MPLS peer-to-peer model, the customer's sites are responsible for exchanging routing information with each other. The customer's routers advertise the VPN routes to each other using a dynamic routing protocol such as OSPF or BGP. In this model, the service provider's routers do not need to know the customer's VPN topology, which simplifies the configuration and reduces the overhead on the service provider's network.

Therefore, options D and E are the correct answers. Options A, B, and C are not applicable to the non-MPLS peer-to-peer model.

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