An engineer is implementing a Cisco MPLS TE tunnel to improve the streaming experience for the clients of a video-on-demand server. Which action must the engineer perform to configure extended discove

Configuring interface bandwidth is related to QoS and traffic engineering, but it does not directly facilitate or configure the LDP session discovery process itself.

Configuring the MPLS TE tunnel on both ends is a prerequisite for the tunnel functionality, but it is a separate configuration from enabling extended LDP session discovery between the tunnel's endpoints.

Configuring an access list is a security measure to permit or deny traffic, including LDP (TCP port 646) traffic, but it is not the mechanism for initiating or enabling LDP's extended discovery process.

Extended discovery in MPLS LDP refers to establishing a Targeted LDP (TLDP) session between non-directly connected LDP peers, such as the headend and tailend of an MPLS TE tunnel. Configuring a targeted neighbor session using commands like `mpls ldp neighbor <ip-address> targeted` enables these endpoints to exchange labels over multiple hops or an existing tunnel.