Zyxel-communications 10 Manuel d'utilisateur télécharger pdf (Page 324)

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ZyWALL 10~100 Series Internet Security Gateway

25-8 Bandwidth Management

25.7 Bandwidth Borrowing

Bandwidth borrowing allows a child-class to borrow unused bandwidth from its parent class, whereas

maximize bandwidth usage allows bandwidth classes to borrow any unused or unbudgeted bandwidth on

the whole interface.

Enable bandwidth borrowing on a child-class to allow the child-class to use its parent class’s unused

bandwidth. A parent class’s unused bandwidth is given to the highest priority child-class first. The child-

class can also borrow bandwidth from a higher parent class (grandparent class) if the child-class’s parent

class is also configured to borrow bandwidth from its parent class. This can go on for as many levels as are

configured to borrow bandwidth from their parent class (see section 25.7.1).

The total of the bandwidth allotments for child-classes cannot exceed the bandwidth allotment of their

parent class. The ZyWALL uses the scheduler to divide a parent class’s unused bandwidth among the child-

classes.

25.7.1 Bandwidth Borrowing Example

Here is an example of bandwidth management with classes configured for bandwidth borrowing. The

classes are set up based on departments and individuals within certain departments.

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Zyxel-communications 10 Manuel d'utilisateur Page 324

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