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Prestige 660H/HW Series User’s Guide
199 Chapter 18 Media Bandwidth Management Advanced Setup
Figure 103 Maximize Bandwidth Usage Example
18.7 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 18.7.1 on page 199).
The total of the bandwidth allotments for child-classes cannot exceed the bandwidth allotment
of their parent class. The Prestige uses the scheduler to divide a parent class’s unused
bandwidth among the child-classes.
18.7.1 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.