ZyXEL ADSL Prestige 2602R-61 VoIP 91-006-024004B Manual Do Utilizador

Prestige 2602R Series User’s Guide

Chapter 18 Media Bandwidth Management Advanced Setup

205

Figure 98   Bandwidth Borrowing Example

• The Administration and Sales classes cannot borrow unused bandwidth from the Root 

class because the Administration and Sales classes has bandwidth borrowing disabled.

• The Marketing and R&D classes can both borrow unused bandwidth from the Root class 

because the Marketing and R&D classes both have bandwidth borrowing enabled. 

If you configure both maximize bandwidth usage (on the interface) and bandwidth borrowing 
(on individual child-classes), the Prestige functions as follows.

1 The Prestige sends traffic according to each bandwidth class’s bandwidth budget.

2 The Prestige assigns a parent class’s unused bandwidth to its child-classes that have more 

traffic than their budgets and have bandwidth borrowing enabled. The Prestige gives 
priority to bandwidth child-classes of higher priority and treats bandwidth classes of the 
same priority equally.

3 The Prestige assigns any remaining unused or unbudgeted bandwidth on the interface to 

any bandwidth class that requires it. The Prestige gives priority to bandwidth classes of 
higher priority and treats bandwidth classes of the same level equally.

4 The Prestige assigns any remaining unbudgeted bandwidth to traffic that does not match 

any of the bandwidth classes.

Click Media Bandwidth Management, Summary to open the screen as shown next. 

Enable bandwidth management on an interface and set the maximum allowed bandwidth for 
that interface.