Int Serv and Diff Serv Integration

In the DiffServ model, RSVP involves only the control plane performing admission control, and does not involve the data plane. With the IntServ integrated into the DiffServ model, it is possible to add RSVP admission control to a network that is already using a differentiated services approach to QoS. RSVP admits or rejects calls based on a preconfigured bandwidth amount, but the actual scheduling is based on preexisting LLQ criteria, such as the differentiated services code point (DSCP) value of each packet.

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