Vivotek IP8352 manual QoS/DSCP the DiffServ model, Users Manual

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QoS/DSCP (the DiffServ model)

DSCP-ECN defines QoS at Layer 3 (Network Layer)� The Differentiated Services (DiffServ) model is based on packet marking and router queuing disciplines. The marking is done by adding a field to the IP header, called the DSCP (Differentiated Services Codepoint)� This is a 6-bit field that provides 64 different class IDs� It gives an indication of how a given packet is to be forwarded, known as the Per Hop Behavior (PHB)� The PHB describes a particular service level in terms of bandwidth, queueing theory, and dropping (discarding the packet) decisions� Routers at each network node classify packets according to their DSCP value and give them a particular forwarding treatment; for example, how much bandwidth to reserve for it�

Below are the setting options of DSCP (DiffServ Codepoint)� Specify the DSCP value for each application (0~63)�

64 - User's Manual