Which device serves as the termination point of a Label Switched Path (LSP)?

The termination point of a Label Switched Path (LSP) is known as the egress Label Edge Router (eLER). The eLER is responsible for receiving the labeled packets at the peak of their journey through the MPLS (Multiprotocol Label Switching) network and then performing the necessary operations to forward them to their final destination. This includes removing the label from the packet and forwarding it based on its destination IP address.

In an MPLS architecture, the eLER is crucial because it marks the exit point from the MPLS domain where the traditional IP network resumes. It plays a vital role in terminating the LSP, ensuring that the packets are correctly processed and sent to the appropriate end-user device or network segment.

In contrast, the Customer Edge (CE) device does not directly manage LSPs, while the Provider (P) router and the ingress Label Edge Router (iLER) are involved in MPLS operations but do not serve as the termination point of the path. Therefore, the eLER is the correct answer as it fulfills the role of concluding the LSP by handling the outgoing packets correctly.