QOS

The QoS service^7.2 (Figure 7.22) in IPBrick allows the customization of traffic priority levels, oriented to the external interface, thus assuring a certain level of quality of the service for the final user. It is importnt to indicate immediately the value of the band width available in the connection for the internet. From these data we can establish priority rules among the several types of traffic in a network. for example: instead of the internet connection being entirely occupied by the email service, limit the band width given to that service and assure a minimum value for the web traffic.

At the Body we have the list of the available Public Interfaces (normally ETH1) and the state of the service for each network card. Clicking the state allows to move between active and inactive. Clicking the network plate allows to accede the management formulary of that service (Figure 7.22).

Figure 7.22: Network - QoS management

In Generic Configurations (Figure 7.23) is possible to define which maximum band width is allowed for download and upload.

In section Structure there are three classes of defined priorities, each one of them already with predefined filters. It is possible to define new filters for each priority class, specifying the following fields:

• Types of filter: ACK type (confirmation of packets reception) or General;
• ToS^7.3:
  • Minimizes the delay;
  • Maximizes debit;
  • Maximizes reliability;
  • Minimizes the cost;
  • Minimizes the cost;
• Protocol: Type of protocol to apply in the filter;
• Source IP;
• Source Port;
• Destination IP;;
• Destination Port.

The Priority Class 1 has always maximum priority, and the traffic is defined in Priority Class 3, the less importnt.

Figure 7.23: Network - QOS - General Configurations

Footnotes

... service^7.2

Quality of Service

... ToS^7.3

Type of Service