Reservation Styles and Merging Flows
When a reservation is made, a set of options can be chosen that is collectively
called the reservation style. RSVP supports two classes of reservations, shared and
distinct, and two scopes of reservations, explicit and wildcard.A shared reservation is
a single reservation made for all packets from multiple upstream senders. A distinct
reservation establishes a reservation for each sender. For the scope, an explicit list
can be chosen for the senders, in which each sender is enumerated.The other
scope option is to use a wildcard that implicitly selects all the senders.
These options give rise to three possible reservation styles (see Table 8.2).The
combination of a distinct reservation with a wildcard scope is disallowed and is
therefore not defined.