Scenario: Dedicated delivery (IP telephony)

If you need dedicated delivery and want to request a reservation, you use an integrated service policy. There are two types of integrated service policies to create: guaranteed and controlled load. In this example, guaranteed service is used.

Situation

The chief executive officer (CEO) of your company is going to give a live broadcast to a client who is located across the country between 1:00 p.m. and 2:00 p.m. You must guarantee that IP telephony has guaranteed bandwidth so that there are no interruptions during the broadcast. In this scenario, the application resides on the server.

Figure 1. CEO to client presentation guaranteed by an integrated service policy

Objectives

Because the application your CEO is using requires a smooth and uninterrupted transfer, you decide to use a guaranteed integrated service policy. Guaranteed service controls the maximum queuing delay so that packets are not delayed over a designated amount of time.

Prerequisites and assumptions

An integrated service policy is an advanced policy that can require substantial resource. Integrated service policies require the following prerequisites:

RSVP-enabled applications
Because your system does not have any RSVP-enabled applications, write your own RSVP-enabled applications. To write your own applications, use the ReSerVation Protocol (RAPI) API or qtoq quality of service (QoS) socket APIs. For more information, see QoS APIs and look for the integrated service APIs.
RSVP-enabled routers and systems along the network path
QoS is a network solution. If you are not sure whether the entire network has RSVP capabilities, you can still create an integrated service policy and use a marking to give it some priority; however, the priority cannot be guaranteed.
Service level agreement
You have a service level agreement (SLA) with your Internet service provider (ISP) to ensure that the policies receive the requested priority. The QoS policy you create on the system enables traffic (in the policy) to receive priority throughout the network. The QoS policy does not guarantee the priority and is dependent on your SLA. In fact, taking advantage of QoS policies can give you some leverage to negotiate certain service levels and rates.

Configuration

After you verify the prerequisites steps, you are ready to create the integrated service policy.

Scenario details: Creating the integrated service policy
This topic contains information about creating the integrated service policy on the system.
Scenario details: Starting or updating the QoS server
This topic contains information about starting or updating the QoS server.
Scenario details: Verifying that the policy is working
This topic contains information about using the monitor to verify that the policy is working as you configured it to work.
Optional: Scenario details: Changing properties
After looking at the monitor results, you can change any policy properties to achieve the results you expect.

Parent topic:

Scenarios: Quality of service policies

Related reference
Monitoring QoS