Netgear GS724TPv2 User Manual - Page 297
Class, Integrated Services, Differentiated Services
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NETGEAR 24-Port Gigabit Smart Managed Pro Switch with PoE+ and 2 SFP Ports Model GS724TPv2 Two basic types of QoS are supported: • Integrated Services. Network resources are apportioned based on request and are reserved (resource reservation) according to network management policy (RSVP, for example). • Differentiated Services. Network resources are apportioned based on traffic classification and priority, giving preferential treatment to data with strict timing requirements. The switch supports DiffServ. The DiffServ feature contains a number of conceptual QoS building blocks that you can use to construct a differentiated service network. Use these same blocks in different ways to build other types of QoS architectures. You must configure three key QoS building blocks for DiffServ: • Class • Policy • 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: • 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 and so on) • Layer 4 source/destination ports • Source/destination IP address From a DiffServ point of view, two types of classes exist: • DiffServ traffic classes • DiffServ service levels/forwarding classes Configuration Examples 297