Which of the following message types does RSVP use to set up an LSP? (Choose two)
Which of the following message types does RSVP use to set up an LSP? (Choose two)
RSVP (Resource Reservation Protocol) is used to set up an LSP (Label Switched Path) in MPLS (Multiprotocol Label Switching) networks. RSVP uses two main message types for this process: the Path message and the Resv message. The Path message is sent downstream from the head-end (ingress router) to the tail-end (egress router) of the LSP. The Resv message is sent upstream from the tail-end to the head-end to confirm the reservation of resources along the path. Therefore, the correct answer is Path message and Resv message.
Setting Up an LSP with Path and Resv Messages RSVP-TE uses two message types to set up an LSP—the Path and Resv messages.
The Path message is originated on Head-end and go downstream until the tail-end. Once the path messagem arrives at tail-end, it will generate the resv message that will upstream to head-end.