Netgear GSM4248P User Manual - Page 772

AV Line of Fully Managed Switches M4250 Series Main User Manual 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, 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 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 class, multiple match criteria are grouped together as an AND expression or a sequential OR expression, depending on the defined class type. Only classes of the same type can be nested; class nesting does not allow for the negation (exclude option) of the referenced class. To configure DiffServ, you must define service levels, namely the forwarding classes/PHBs identified by a DSCP value, on the egress interface. You define these service levels by configuring BA classes for each. Configuration Examples 772 Main User Manual