P-2602H(W)(L)-DxA Series User’s Guide
19.5.2 Fairness-based Scheduler
The ZyXEL Device divides bandwidth equally among bandwidth classes when using the
19.6 Maximize Bandwidth Usage
The maximize bandwidth usage option (see Figure 136 on page 258) allows the ZyXEL Device to divide up any available bandwidth on the interface (including unallocated bandwidth and any allocated bandwidth that a class is not using) among the bandwidth classes that require more bandwidth.
When you enable maximize bandwidth usage, the ZyXEL Device first makes sure that each bandwidth class gets up to its bandwidth allotment. Next, the ZyXEL Device divides up an interface’s available bandwidth (bandwidth that is unbudgeted or unused by the classes) depending on how many bandwidth classes require more bandwidth and on their priority levels. When only one class requires more bandwidth, the ZyXEL Device gives extra bandwidth to that class.
When multiple classes require more bandwidth, the ZyXEL Device gives the highest priority classes the available bandwidth first (as much as they require, if there is enough available bandwidth), and then to lower priority classes if there is still bandwidth available. The ZyXEL Device distributes the available bandwidth equally among classes with the same priority level.
19.6.1 Reserving Bandwidth for Non-Bandwidth Class Traffic
Do the following to configure the ZyXEL Device to allow bandwidth for traffic that is not defined in a bandwidth filter.
1Do not enable the interface’s Maximize Bandwidth Usage option.
2Leave some of the interface’s bandwidth unbudgeted. Make sure that the interface’s root class has more bandwidth than the sum of the bandwidths of the interface’s bandwidth management rules.
Chapter 19 Bandwidth Management | 255 |
