Rsvp Terminology - 3Com 4007 Implementation Manual

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RSVP Terminology

RSVP
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Familiarize yourself with the following RSVP terms:
RSVP Flow — A data stream that operates in simplex, going one way
from the origin to multiple destinations. The flows go from a set of
senders to a set of receivers.
Reservation Style — The types of multicast flows that RSVP installs:
Fixed Filter (distinct) Style — A flow that originates from one
sender only (for example, a video application). This style requires a
separate reservation per sender on each transmission type.
Shared Explicit — A shared-reservation flow that originates from
a limited number of senders (for example, an audio application).
This style identifies the flows for specific network resources. A
single reservation can be applied to all senders in the set.
Wildcard Filter — A shared-reservation flow from all senders.
Total reservable bandwidth percentage — Controls the admission
control policy. RSVP begins to refuse reservations when the requested
bandwidth on an output link exceeds the total reservable bandwidth.
You specify a percentage of the output link (a value of from 0 through
200, with 50 as the default). This percentage is the amount of
bandwidth that you allow RSVP to reserve in the Multilayer Switching
Module. You can over-subscribe (over 100) and specify a value up to
200.
Maximum per-reservation bandwidth — The largest reservation
that RSVP attempts to install. Specify this bandwidth using a
percentage of the output link (a value of from 0 through 100; 50 is
the default).
Policing options — Ensure that an RSVP session uses only as much
bandwidth as it requested. The policing options mandate when to
drop nonconforming excess packets. You configure the Multilayer
Switching Module to observe one of these policing options:
Edge — Causes nonconforming excess packets to be dropped only
at the edge (that is, when the traffic has not yet passed through
any network device that has already performed policing for that
flow). The Multilayer Switching Module polices the flow when
RSVP requests it. Edge is the default policing option. The RSVP
protocol knows how to detect what is edge and what is not when
it polices.
Always — The Multilayer Switching Module always polices the
flow.