Prestige 650 Series User’s Guide

and on their priority levels. When only one class requires more bandwidth, the Prestige gives extra bandwidth to that class.

When multiple classes require more bandwidth, the Prestige 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 Prestige distributes the available bandwidth equally among classes with the same priority level.

20.6.1 Reserving Bandwidth for Non-Bandwidth Class Traffic

Do the following three steps to configure the Prestige to allow bandwidth for traffic that is not defined in a bandwidth filter.

Leave some of the interface’s bandwidth unbudgeted.

Do not enable the interface’s Maximize Bandwidth Usage option.

Do not enable bandwidth borrowing on the child-classes that have the root class as their parent (see section 20.7).

20.6.2 Maximize Bandwidth Usage Example

Here is an example of a Prestige that has maximized bandwidth usage enabled on an interface. The first figure shows each bandwidth class’s bandwidth budget and priority. The classes are set up based on subnets. The interface is set to 10 Mbps. Each subnet is allocated 2 Mbps. The unbudgeted 2 Mbps allows traffic not defined in one of the bandwidth filters to go out when you do not select the maximize bandwidth option.

Figure 20-4 Bandwidth Allotment Example

Bandwidth Management

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