Chapter 42 Configuring PFC QoS

Common QoS Scenarios

After you create the class maps, create a policy map that defines the action of the QoS policy so that it sets a particular DSCP value for each traffic type or traffic class. This example creates one policy map (called IPPHONE-PC), and all the class maps are included in that single policy map, with an action defined in each class map. This is the syntax for the policy map and class maps:

policy-map IPPHONE-PC class CLASSIFY-VOICE

set dscp ef

class CLASSIFY-VOICE-SIGNAL set dscp cs3

class CLASSIFY-PC-SAP set dscp 25

class CLASSIFY-OTHER set dscp 0

At this point, the QoS policy defined in the policy map still has not taken effect. After you configure a policy map, you must apply it to an interface for it to affect traffic. You use the service-policycommand to apply the policy map. Remember that an input service policy can be applied to either a port or to VLAN interfaces, but that an output service policy can only be applied to VLAN interfaces (only the PFC3 supports output policies). In this example, you apply the policy as an input service-policy to each interface that has a PC and IP phone attached. This example uses port-based QoS, which is the default for Ethernet ports.

interface FastEthernet5/1 service-policy input IPPHONE-PC

A QoS policy now has been successfully configured to classify the traffic coming in from both an IP phone and a PC.

To ensure that the policy maps are configured properly, enter this command:

Router# show policy-map interface fastethernet 5/1

FastEthernet5/1

Service-policy input:IPPHONE-PC

class-map:CLASSIFY-VOICE (match-all) Match:access-group name CLASSIFY-VOICE set dscp 46:

class-map:CLASSIFY-PC-SAP (match-all) Match:access-group name CLASSIFY-PC-SAP set dscp 25:

class-map:CLASSIFY-OTHER (match-all) Match:access-group name CLASSIFY-OTHER set dscp 0:

class-map:CLASSIFY-VOICE-SIGNAL (match-all) Match:access-group name CLASSIFY-VOICE-SIGNAL set dscp 24:

To ensure that the port is using the correct QoS mode, enter this command:

Router# show queueing interface gigabitethernet 5/1 include Port QoS

Port QoS is enabled

To ensure that the class map configuration is correct, enter this command:

Router# show class-map

Class Map match-all CLASSIFY-OTHER (id 1)

Match access-group name CLASSIFY-OTHER

 

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

 

 

 

 

 

 

OL-4266-08

 

 

42-115

 

 

 

 

 

Page 114 Page 116
Page 115
Image 115
Cisco Systems OL-4266-08 manual 42-115, Set dscp ef
Page 114 Page 116

OL-4266-08 specifications

Cisco Systems OL-4266-08 is a robust and versatile certification that focuses on the essentials of implementing and troubleshooting Cisco collaborations solutions. As enterprises increasingly rely on unified communications, having professionals who are knowledgeable in the latest Cisco technologies becomes a necessity. This certification is part of the Cisco Certified Network Associate (CCNA) program, which serves as a foundational stepping stone for individuals aspiring to build a career in networking and collaboration technologies.

One of the main features of OL-4266-08 is its emphasis on collaboration foundations, which includes an understanding of voice, video, messaging, and conferencing technologies. Professionals who obtain this certification demonstrate proficiency in deploying, configuring, and troubleshooting Cisco collaboration solutions like Cisco Unified Communications Manager and Cisco Webex. This knowledge is critical as businesses seek to enhance communication and productivity through integrated systems.

Technologically, OL-4266-08 covers a wide array of essential concepts, including IP telephony, voicemail, and collaborative tools. Candidates learn about the architecture of unified collaboration systems, involving integration with routing and switching networks. Additionally, it delves into security protocols to ensure secure transmissions of voice and video data, thereby protecting sensitive corporate communication.

In terms of characteristics, OL-4266-08 is designed to be both comprehensive and practical. The certification emphasizes hands-on experience, which is essential for understanding real-world applications of Cisco technologies. The coursework provides extensive exposure to simulations and labs that mimic actual network environments. This hands-on approach enables candidates to troubleshoot issues effectively using Cisco's troubleshooting tools and methodologies.

Moreover, the certification aligns with industry standards, ensuring that individuals gain relevant and in-demand skills. Given the evolving landscape of network technologies, OL-4266-08 prepares individuals for future growth and specialization in various areas, including cloud collaboration and Internet of Things (IoT) communications.

In conclusion, Cisco Systems OL-4266-08 equips networking professionals with the necessary skills to implement and support Cisco collaboration solutions. The focus on hands-on experience, along with in-depth coverage of technology and security protocols, makes it a valuable certification in the fast-paced world of network communications. With the rise of remote work and digital collaboration, this certification is pivotal for anyone looking to enhance their career in networking and technology.
Top Page Image Contents