Netgear M5300-28G (GSM7228S) - ProSAFE 24-port Gigabit L2+ Managed Stackable Switch ソフトウェアガイド
Configuration Examples
750
M6100, M5300, and M7100 Series Managed Switches
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Differentiated Services
: network resources are apportioned based on traffic classification
and priority, giving preferential treatment to data with strict timing requirements.
managed switch switches support DiffServ.
The DiffServ feature contains a number of conceptual QoS building blocks you can use to
construct a differentiated service network. Use these same blocks in different ways to build
other types of QoS architectures.
construct a differentiated service network. Use these same blocks in different ways to build
other types of QoS architectures.
There are 3 key QoS building blocks needed to configure DiffServ:
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Class
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Policy
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Service (the assignment of a policy to a directional interface)
Class
You can classify incoming packets at Layers 2, 3 and 4 by inspecting the following
information for a packet:
information for a packet:
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Source/destination MAC address
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EtherType
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Class of Service (802.1p priority) value (first/only VLAN tag)
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VLAN ID range (first/only VLAN tag)
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Secondary 802.1p priority value (second/inner VLAN tag)
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Secondary VLAN ID range (second/inner VLAN tag)
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IP Service Type octet (also known as: ToS bits, Precedence value, DSCP value)
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Layer 4 protocol (TCP, UDP and so on)
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Layer 4 source/destination ports
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Source/destination IP address
From a DiffServ point of view, there are two types of classes:
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DiffServ traffic classes
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DiffServ service levels/forwarding classes
DiffServ Traffic Classes
With DiffServ, you define which traffic classes to track on an ingress interface. You can define
simple BA classifiers (DSCP) and a wide variety of multi-field (MF) classifiers:
simple BA classifiers (DSCP) and a wide variety of multi-field (MF) classifiers:
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Layer 2; Layers 3, 4 (IP only)
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Protocol-based
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Address-based
You can combine these classifiers with logical AND or OR operations to build complex
MF-classifiers (by specifying a class type of all or any, respectively). That is, within a single
MF-classifiers (by specifying a class type of all or any, respectively). That is, within a single