NETGEAR XS712T-100NES manual DiffServ Traffic Classes, 291

XS712T Smart Switch

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)

•IP Service Type octet (also known as: ToS bits, Precedence value, DSCP value)

•Layer 4 protocol (such as TCP or UDP)

•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 multifield (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 (i.e., exclude option) of the referenced class.

To configure DiffServ, you must define service levels, namely the forwarding classes/PHBs identified by a given DSCP value, on the egress interface. These service levels are defined by configuring BA classes for each.

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