Rsvp Elements; Message Types - Extreme Networks BlackDiamond 6800 MPLS Installation And User Manual

Configuring RSVP-TE
terms of peak data rate, average data rate, burst size, and minimum/maximum packet
sizes.
RSVP-TE is a set of traffic engineering extensions to RSVP. RSVP-TE extensions enable
RSVP to be used for traffic engineering in MPLS environments. The primary extensions
add support for assigning MPLS labels and specifying explicit paths as a sequence of
loose and strict routes. These extensions are supported by including label request and
explicit route objects in the path message. A destination responds to a label request by
including a label object in its reserve message. Labels are then subsequently assigned at
each node the reserve message traverses. Thus, RSVP-TE operates in
downstream-on-demand label advertisement mode with ordered LSP control.
ExtremeWare does not support native RSVP. RSVP is supported only on TE
LSPs.

RSVP Elements

This section describes the following elements of the RSVP protocol:
• Message Types on page 5-2
• Reservation Styles on page 5-4
• Bandwidth Reservation on page 5-6

Message Types

RSVP has two basic message types, path message and reserve message, as shown in
Figure 5-1.
5-2 MPLS Module Installation and User Guide