VRF Lite Explained

D.

VRF Lite (Virtual Routing and Forwarding Lite) is a feature that allows a single physical device, such as a router, to support multiple logical routing tables or VRFs. Each VRF instance operates independently, as if it were running on its own dedicated router. This allows for traffic segregation, enabling different customers or applications to use the same physical network infrastructure while keeping their traffic separate and secure.

Out of the given options, option D is incorrect as MPLS label switching and the MPLS control plane are supported in VRF Lite implementation.

Option A is also incorrect as VRF Lite is not an IPv6 transition mechanism. Instead, it is used to segregate and isolate IPv4 or IPv6 traffic in a shared network infrastructure.

Option C is also incorrect as it describes an implementation of VRF Lite that uses VLAN SVI connectivity between the PE and CE devices, which is not a characteristic of VRF Lite.

The correct answer is option B. VRF Lite can be used to enable multiple customers to share a single customer edge (CE) device, while maintaining separate VRF tables by using Route Target (RT) information that it learns from Provider Edge (PE) devices. This allows for traffic segregation between different customers or applications that are using the same CE device, enabling them to operate independently as if they were connected to separate routers.