ZyXEL Communications P-660H-D Series - Manual (Page 167)

P-660R/H-D Series User’s Guide
Chapter 16 Media Bandwidth Management Advanced Setup 166
16.8.1 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.
• The Research Software and Hardware classes can both borrow unused bandwidth from
the Research class because the Research Software and Hardware classes both have
bandwidth borrowing enabled.
• The Research Software and Hardware classes can also borrow unused bandwidth from
the Root class because the Research class also has bandwidth borrowing enabled.
16.9 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 child-classes of higher priority and treats classes of the same priority equally.
3 The Prestige assigns any remaining unused or unbudgeted bandwidth on the interface to
any class that requires it. The Prestige gives priority to classes of higher priority and
treats classes of the same level equally.
4 If the bandwidth requirements of all of the traffic classes are met and there is still some
unbudgeted bandwidth, the Prestige assigns it to traffic that does not match any of the
classes.
16.10 The Main Media Bandwidth Management Screen
Click Media Bandwidth Mgnt. to display the main Media Bandwidth Management screen
as shown.
Table 53 Bandwidth Borrowing Example
BANDWIDTH CLASSES AND BANDWIDTH BORROWING SETTINGS
Root Class: Administration: Borrowing Enabled
Sales: Borrowing Disabled Sales USA: Borrowing Enabled
Sales Asia: Borrowing Disabled
Marketing: Borrowing Enabled
Research: Borrowing Enabled Software: Borrowing Enabled
Hardware: Borrowing Enabled