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

DESCRIPTION

 

 

Interface

Select an interface from the drop-down list box for which you wish to set up classes.

 

 

Back

Click Back to go to the main Media Bandwidth Management screen.

 

 

Add Child-Class

Click Add Child-classto add a sub-class.

 

 

Edit

Click Edit to configure the selected class. You cannot edit the root class.

 

 

Delete

Click Delete to delete the class and all its child-classes. You cannot delete the root

 

class.

Statistics

Click Statistics to display the status of the selected class.

 

 

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.

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Chapter 16 Media Bandwidth Management Advanced Setup