ZyXEL Communications 660HW Series - Manual (Page 201)

Prestige 660H/HW Series User’s Guide
Chapter 18 Media Bandwidth Management Advanced Setup 200
Figure 104 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.
18.7.2 Maximize Bandwidth Usage With Bandwidth Borrowing
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.
18.8 Configuring Summary
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.