ZyWALL 5/35/70 Series User’s Guide

25.6 Application and Subnet-based Bandwidth Management

You could also create bandwidth classes based on a combination of a subnet and an application. The following example table shows bandwidth allocations for application specific traffic from separate LAN subnets.

Table 136 Application and Subnet-based Bandwidth Management Example

TRAFFIC TYPE

FROM SUBNET A

FROM SUBNET B

 

 

 

VoIP

64 Kbps

64 Kbps

 

 

 

Web

64 Kbps

64 Kbps

 

 

 

FTP

64 Kbps

64 Kbps

 

 

 

E-mail

64 Kbps

64 Kbps

 

 

 

Video

64 Kbps

64 Kbps

 

 

 

25.7 Scheduler

The scheduler divides up an interface’s bandwidth among the bandwidth classes. The ZyWALL has two types of scheduler: fairness-based and priority-based.

25.7.1 Priority-based Scheduler

With the priority-based scheduler, the ZyWALL forwards traffic from bandwidth classes according to the priorities that you assign to the bandwidth classes. The larger a bandwidth class’s priority number is, the higher the priority. Assign real-time applications (like those using audio or video) a higher priority number to provide smoother operation.

25.7.2 Fairness-based Scheduler

The ZyWALL divides bandwidth equally among bandwidth classes when using the fairness- based scheduler; thus preventing one bandwidth class from using all of the interface’s bandwidth.

25.7.3 Maximize Bandwidth Usage

The maximize bandwidth usage option (see Figure 194 on page 409) allows the ZyWALL 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.

Chapter 25 Bandwidth Management

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