Netgear GSM7328Sv2 - ProSAFE 24+4 Gigabit Ethernet L3 Managed Stackable Switch 管理员指南

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:

Finance

VLAN 20:

Marketing

VLAN 30:

Test

VLAN 40:

Development

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