eLibrary: Administering Cisco Qos for IP Networks

Before going to the discussion of the Book Administering Cisco QoS for IP Networks I just want to let you know a little bit about the Quality of Service or also called QoS.

We have three models regarding Quality of service

The first one is the default model called the Best-effort service model Second one that we will discuss is the Integrated services model and the third is the Differentiated services

Best-effort service model

At the initial level internet ensures the delivery service of packets on the basis of best effort. It is a default mode for all types of traffic. There is no priority level for any type of traffic. An example of it is we use standard mail service.

The advantages of this model are it is highly scalable and not required any special mechanisms.

But the disadvantage is that there is no service guarantee and you cannot differentiate in service.

Integrated services model

It is an older model of QoS described as a signaling process. An individual flow request for the already reserved bandwidth and delay by the network is needed by it for flow.
Resource reservation protocol also called RSVP is used in this model for reserving the bandwidth and also for QoS tools for a particular flow.
Due to some limitations if it is already reserved then other traffic cannot use it this is the reason this model is not scalable. Another thing regarding the configuration is that you need to do admin configuration separately on the router for each flow.

The differentiated services model

It is designed to break the boundary of limitations of best-effort and integrated service models. Traffic on this network is identified by the class and the network's QoS policy ensures that traffic classes are discriminated against. For each class level of service need to choose. This model is highly scalable and many levels of quality are possible in it. But some disadvantages are still there. There is no absolute service guarantee and its mechanisms are also complex.

The main topics discussed in this book

IP Quality of Service also called QoS and implementation of QoS in Enterprise and Internet Service Provider (ISP) environments. If you want to implement the routing protocols and Quality of Service mechanisms in your Cisco network devices, this book will provide you the detail with examples and exercises to get hands-on experience and sound knowledge all about mentioned above.

The impact of QoS in our business is that it will make sure the delivery of the right information which is most important to the bottom-line success of the business. The impact of QoS in our business is that it will make sure the delivery of the right information which is most important to the bottom-line success of the business. QoS set the priority level as per the requirement for mission-critical and non-critical applications. It provides the best network resources to the mission-critical application according to their tasks.

Administering Cisco Qos for IP Networks

eLibrary