Illustrated TCP/IP by Matthew G. Naugle Wiley Computer Publishing, John Wiley & Sons, Inc. ISBN: 0471196568   Pub Date: 11/01/98

Chapter 332
RSVP Control

These options also allow for the control of the selection of senders: explicit, which allows for a selected group of senders (each filterspec must match exactly one sender); or a wildcard that implicitly selects all the senders to the session (no filterspec is needed). These styles define how reservations are treated from different senders within the same session, and if the requests need to meet a specific criteria or not. There are three types:

Wildcard filter type: Implies both the shared reservation and the wildcard sender selection. This creates a single reservation shared by flows from all upstream neighbors. You can think of this as a big pipe, completely independent of the number of senders using it, which is shared by multiple inputs to the pipe. The size is simply the largest of the resource requests from all receivers; it automatically extends to new senders as they appear.

Fixed Filter: Implies distinct reservation and explicit sender selection. This allows a reservation to be set up for packets from a particular sender, which are not shared with other senders’ packets, even from the same session. This style can quickly use up all available resources.

Shared Explicit: This implies shared reservation and explicit sender. It creates a single reservation shared by selected, not all, upstream neighbors.

RSVP Control