You have been asked to deploy a Layer 2 VPN for a new customer. What information will be present in the PE's associated VPN forwarding table? (Choose three.)
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A. B. C. D. E.ABD
In a Layer 2 VPN, the customer's sites are connected to a provider edge (PE) router, which encapsulates the customer's traffic and forwards it across the provider's network to the remote PE router, where it is de-encapsulated and delivered to the destination site. The PE router maintains a VPN forwarding table to keep track of the customer's traffic.
The information that will be present in the PE's associated VPN forwarding table are:
A. The customer site ID: This is a unique identifier for the customer's site that is used to differentiate between different sites within the same VPN. The site ID is used in the VPN forwarding table to associate incoming traffic with the correct site and to determine the correct outgoing interface for the traffic.
B. The route distinguisher: This is a unique identifier that is used to distinguish between different VPNs that are using the same IP address space. The route distinguisher is used in the VPN forwarding table to associate incoming traffic with the correct VPN and to determine the correct outgoing interface for the traffic.
D. The label base: In a Layer 2 VPN, traffic is encapsulated with MPLS labels to enable it to traverse the provider's network. The label base is a starting point for the label stack that is used to encapsulate the customer's traffic. The label base is used in the VPN forwarding table to determine the correct label stack for the traffic.
C. The interface encapsulation: The interface encapsulation is the method that is used to encapsulate the customer's traffic for transport across the provider's network. There are several methods that can be used for encapsulation, such as MPLS, VLAN, or GRE. The interface encapsulation is used in the VPN forwarding table to determine the correct encapsulation method for the traffic.
E. The community name: A community is a group of sites within a VPN that share common routing policies or characteristics. The community name is used to identify which community the customer's site belongs to. The community name is used in the VPN forwarding table to determine the correct routing policies for the traffic.
In summary, the information that will be present in the PE's associated VPN forwarding table includes the customer site ID, the route distinguisher, and the label base. The interface encapsulation and the community name may also be present, depending on the specific configuration of the Layer 2 VPN.