NETGEAR M4100, M7100 manual DiffServ, Class B subnet with differentiated services

ProSafe M4100 and M7100 Managed Switches

•Class. A class consists of a set of rules that identify which packets belong to the class. Inbound traffic is separated into traffic classes based on Layer 3 and Layer 4 header data and the VLAN ID, and marked with a corresponding DSCP value. One type of class is supported: All, which specifies that every match criterion defined for the class must be true for a match to occur.

•Policy. Defines the QoS attributes for one or more traffic classes. An example of an attribute is the ability to mark a packet at ingress. The 7000 Series Managed Switch supports a traffic conditions policy. This type of policy is associated with an inbound traffic class and specifies the actions to be performed on packets meeting the class rules:

-Marking the packet with a given DSCP code point, IP precedence, or CoS

-Policing packets by dropping or re-marking those that exceed the class’s assigned data rate

-Counting the traffic within the class

•Service. Assigns a policy to an interface for inbound traffic.

DiffServ

This example shows how a network administrator can provide equal access to the Internet (or other external network) to different departments within a company. Each of four departments has its own Class B subnet that is allocated 25 percent of the available bandwidth on the port accessing the Internet.

	Internet
	Port 1/0/5
	Outbound
Layer 3 Switch
	Port 1/0/1	Port 1/0/4
	Port 1/0/2	Port 1/0/3
VLAN 10:	VLAN 20:	VLAN 30:	VLAN 40:
Finance	Marketing	Test	Development

Figure 22. Class B subnet with differentiated services

The example is shown as CLI commands and as a Web interface procedure.

Chapter 12. DiffServ 201