Implementing IP quality of service, step 3

Step 3: Defining policies for each traffic class

After the traffic classes have been formed based on the network audit and business objectives, the

IP quality of service IP quality of service is becoming increasingly important as customers add bandwidth-intensive services and applications to their networks. Value-added resellers (VARs) and systems integrators who can troubleshoot and improve sub-optimal performance in a converged network environment have marketable skills. This excerpt from CCNP ONT Official Exam Certification Guide defines quality of service and the three steps to implementing it.

final step of implementing QoS in an enterprise is to provide a network-wide definition for the QoS service level that must be assigned to each traffic class. This is called defining a QoS policy, and it might include having to complete the following tasks:

Applying congestion management, congestion avoidance and many other advanced QoS technologies to a class

To provide an example, based on the traffic classes listed in the previous section, Table 2-2 defines a practical QoS policy.

Table 2-2 Defining QoS policy for set traffic classes

Class	Priority	Queue Type	Min/Max Bandwidth	Special QoS Technology
Voice	5	Priority	1 Mbps Min 1 Mbps Max	Priority queue
Business mission critical	4	CBWFQ	1 Mbps Min	CBWFQ
Signaling	3	CBWFQ	400 Kbps Min	CBWFQ
Transactional	2	CBWFQ	1 Mbps Min	CBWFQ
Best-effort	1	CBWFQ	500 Kbps Max	CBWFQ CB-Policing
Scavenger	0	CBWFQ	Max 100 Kbps	CBWFQ +CB-Policing WRED

Reproduced from the book CCNP ONT Official Exam Certification Guide Copyright [2007], Cisco Systems, Inc. Reproduced by permission of Pearson Education, Inc., 800 East 96th Street, Indianapolis, IN 46240. Written permission from Pearson Education, Inc. is required for all.

Digg This!     StumbleUpon     Del.icio.us

RELATED RESOURCES 2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems Search Bitpipe.com for the latest white papers and business webcasts Whatis.com, the online computer dictionary