ZyXEL Communications P-2302R Series User Manual

P-2302R Series User’s Guide

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Chapter 19 Bandwidth Management

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 Sales class cannot borrow unused bandwidth from the Root class because the Sales 

class has bandwidth borrowing disabled.

If you configure both maximize bandwidth usage (on the interface) and bandwidth borrowing 
(on individual sub-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 sub-classes that have more 

traffic than their budgets and have bandwidth borrowing enabled. The Prestige gives 
priority to sub-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.

Click BW MGMT to open the Summary screen. 

Use this screen to enable bandwidth management on an interface and set the maximum 
allowed bandwidth and scheduler for the interface. You can also enable or disable maximize 
bandwidth usage. 

Table 80   Bandwidth Borrowing Example

Root Class: 

Administration: Borrowing Enabled

Sales: Borrowing Disabled

Marketing: Borrowing Enabled

Research: Borrowing Enabled