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Introduction 11
Example Illustration of Weighted Fair Queueing and Class-Based Queueing
This example demonstrates the effects of using Weighted Fair Queueing and Class-Based Queueing together.
In this example configuration, these parameters apply:

A single WAN interface with a global upper limit of 900M
 600 total subscribers; 200 with upper bandwidth of 2M, 200 with upper bandwidth of 4M, 200 with
upper bandwidth of 6M

Two classes:

Class1: Priority 1, Minimum = 400M, Maximum = 900M
 Class2: Priority 2, Minimum = 200M, Maximum = 900M

100 subscribers with each limit are assigned to Class1, and 100 to Class2

Class2 subscribers begin running first, followed by those in Class1 about a minute later.
The subscribers in Class2 initially receive all of the available bandwidth, weighted correctly. As Class1
subscribers connect, the Class2 subscribers are driven to the minimum of 200M, still weighted correctly. At
that point the Class1 subscribers receive all remaining bandwidth (about 700M), also weighted correctly.