After you analyze your network environment, you decide to implement a full separation model for Internet access and MPLS L3VPN services.
For which reason do you make this decision?
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A. B. C. D.A.
The decision to implement a full separation model for Internet access and MPLS L3 VPN services is typically based on the need to achieve greater control and flexibility in managing and securing the network environment. This model involves deploying separate routers or routing instances for the two services, thereby allowing them to operate independently.
One of the main reasons for implementing this model is to enable EGP (Exterior Gateway Protocol) and IGP (Interior Gateway Protocol) to operate independently. EGP is used to exchange routing information between different autonomous systems (AS), while IGP is used to exchange routing information within an AS. By separating Internet access and MPLS L3 VPN services into different routing instances, it is possible to use different routing protocols for each service. This can help to optimize network performance and reduce the risk of routing conflicts and instability.
Another reason for implementing a full separation model is that it allows the network operator to choose whether to separate or centralize each individual service. This means that services can be deployed in a way that best suits the needs of the organization, rather than being constrained by the limitations of a single routing instance. For example, the Internet access service may be centralized for better security, while the MPLS L3 VPN service may be separated for better performance.
Contrary to option C, it is not necessarily easier to manage a system in which services are mixed. Mixing services can lead to increased complexity and potential conflicts, which can make management more challenging. By separating services into different routing instances, it is possible to simplify management and troubleshooting.
Finally, it should be noted that a full separation model typically requires more than one edge router. This is because separate routers or routing instances are required for Internet access and MPLS L3 VPN services. Multiple routers may also be needed to provide redundancy and ensure high availability for critical services. Therefore, option D is incorrect.