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5
Configuring RSVP-TE
This chapter describes the Resource Reservation Protocol (RSVP), traffic engineering
(TE) extensions to RSVP, and how you configure RSVP-TE using ExtremeWare.
This chapter covers the following topics:
• RSVP Elements on page 5-2
• Traffic Engineering on page 5-8
• RSVP Features on page 5-10
• Configuring RSVP-TE on page 5-14
• Configuration Example on page 5-26
RSVP is a protocol that defines procedures for signaling QoS requirements and
reserving the necessary resources for a router to provide a requested service to all nodes
along a data path.
RSVP is not a routing protocol. It works in conjunction with unicast and multicast
routing protocols. An RSVP process consults a local routing database to obtain routing
information. Routing protocols determine where packets get forwarded; RSVP is
concerned with the QoS of those packets that are forwarded in accordance with the
routing protocol.
Reservation requests for a flow follow the same path through the network as the data
comprising the flow. RSVP reservations are unidirectional in nature, and the source
initiates the reservation procedure by transmitting a path message containing a traffic
specification (Tspec) object. The Tspec describes the source traffic characteristics in
MPLS Module Installation and User Guide
5-1
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