Integrated service types

There are two integrated service types: controlled load and guaranteed service.

Controlled load

Controlled load service supports the applications that are highly sensitive to the congested networks, such as real time applications. Applications must also be tolerant of small amounts of loss and delay. If an application uses the controlled load service, its performance will not suffer as network load increases. Traffic is provided with service resembling normal traffic in a network under light conditions.

Routers must ensure that the controlled load service receives adequate bandwidth and packet processing resources. To do this, they must be quality of service (QoS) enabled with support for integrated services. You need to check the router's specifications to see whether they provide QoS through a traffic control function. Traffic control consists of the following components: packet scheduler, packet classifier, and admission control.

Guaranteed service

Guaranteed service assures that the packets arrive within a designated delivery time. Applications that need guaranteed service include video and audio broadcasting systems that use streaming technologies. Guaranteed service controls the maximum queuing delay so that the packets are not delayed over a designated amount of time. Every router along the packet's path must provide ReSerVation Protocol (RSVP) capabilities to assure the delivery. When you assign the token bucket limits and bandwidth limits, you are defining your guaranteed service. Guaranteed service can only be applied to the applications using TCP.

Parent topic:

Integrated service