Vivotek FD8166A-N ~ EOL FD8166A-N User Manual

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VIVOTEK

User's Manual - 81

QoS/DSCP (the DiffServ model)

DSCP-ECN denes 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 eld

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).

QoS Baseline/Technical Marketing Classication and Marking Recommendations

Application Layer3 Classication Layer 2 CoS/MPLS EXP

IPP PHB DSCP

IP Routing 6 CS6 48 6

Voice 5 EF 46 5

Interactive Video 4 AF41 34 4 QoS B

Streaming-Video 4 CS4 32 4

Locally-dened Mission-

Critical Data

3 - 25 3

Call-signaling 3 AF31/CS3 26/24 3

Transactional Data 2 AF21 18 2

Network Management 2 CS2 16 2

Bulk Data 1 AF11 10 1

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Vivotek FD8166A-N ~ EOL FD8166A-N Ultra-mini Fixed Dome Network Camera