What is RSVP-TE?

RSVP-TE (Resource Reservation Protocol - Traffic Engineering) is a signaling protocol used in MPLS (Multiprotocol Label Switching) networks to establish label-switched paths (LSPs) for traffic engineering purposes. It allows network operators to reserve bandwidth and other resources along a specific path through the network, ensuring a certain quality of service (QoS) for critical traffic. It is commonly used to create explicit routes that bypass congested links or to prioritize certain types of traffic over others.