Netgear GS108Tv2 GS108Tv2/GS110TP Software Reference Manual - Page 286
Class, DiffServ Traffic Classes, Layer 4 protocol TCP, UDP etc.
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GS108T and GS110TP Smart Switch Software Administration Manual 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. There are 3 key QoS building blocks needed to configure DiffServ: • Class • Policy • Service (i.e., 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: • Source/destination MAC address • EtherType • Class of Service (802.1p priority) value (first/only VLAN tag) • VLAN ID range (first/only VLAN tag) • Secondary 802.1p priority value (second/inner VLAN tag) • Secondary VLAN ID range (second/inner VLAN tag) • IP Service Type octet (also known as: ToS bits, Precedence value, DSCP value) • Layer 4 protocol (TCP, UDP etc.) • Layer 4 source/destination ports • Source/destination IP address From a DiffServ point of view, there are two types of classes: • DiffServ traffic classes • 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: • Layer 2; Layers 3, 4 (IP only) • Protocol-based • Address-based B-8 Configuration Examples v1.0, April 2010