Diffserv; Dscp And Per-Hop Behavior; Figure 81 Media Bandwidth Management: Class Setup; Table 56 Media Bandwidth Management: Class Setup - ZyXEL Communications P-660H-D Series User Manual

P-660R/H-D Series User's Guide

Figure 81 Media Bandwidth Management: Class Setup

The following table describes the labels in this screen.

Table 56 Media Bandwidth Management: Class Setup

LABEL
Interface
Back
Add Child-Class
Edit
Delete
Statistics

16.12.1 DiffServ

DiffServ is a class of service (CoS) model that marks packets so that they receive specific per-
hop treatment at DiffServ-compliant network devices along the route based on the application
types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) indicating the
level of service desired. This allows the intermediary DiffServ-compliant network devices to
handle the packets differently depending on the code points without the need to negotiate
paths or remember state information for every flow. In addition, applications do not have to
request a particular service or give advanced notice of where the traffic is going.

16.12.1.1 DSCP and Per-Hop Behavior

DiffServ defines a new DS (Differentiated Services) field to replace the Type of Service
(TOS) field in the IP header. The DS field contains a 2-bit unused field and a 6-bit DSCP field
which can define up to 64 service levels. The following figure illustrates the DS field.
169
DESCRIPTION
Select an interface from the drop-down list box for which you wish to set up classes.
Click Back to go to the main Media Bandwidth Management screen.
Click Add Child-class to add a sub-class.
Click Edit to configure the selected class. You cannot edit the root class.
Click Delete to delete the class and all its child-classes. You cannot delete the root
class.
Click Statistics to display the status of the selected class.
Chapter 16 Media Bandwidth Management Advanced Setup