ZyXEL Communications 650 Series Manuel D’Utilisation

Prestige 650 Series User’s Guide 

Bandwidth Management 

 

20-9 

 The Bill class cannot borrow unused bandwidth from the Root class because the Sales class has 

bandwidth borrowing disabled. 

 The Amy class cannot borrow unused bandwidth from the Sales USA class because the Amy class 

has bandwidth borrowing disabled. 

 The R&D Software and Hardware classes can both borrow unused bandwidth from the R&D class 

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

 The R&D Software and Hardware classes can also borrow unused bandwidth from the Root class 

because the R&D class also has 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 BW Manager, Summary to open the Summary screen. 

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