C H A P T E R 42

Configuring PFC QoS

 

 

This chapter describes how to configure quality of service (QoS) as implemented on the Policy Feature

 

 

Card (PFC) and Distributed Forwarding Cards (DFCs) on the Cisco 7600 series routers.

 

 

 

Note

• For complete syntax and usage information for the commands used in this chapter, refer to the

 

 

Cisco 7600 Series Router Cisco IOS Command Reference at this URL:

 

 

http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/software/122sx/cmdref/index.htm

 

 

• For information about QoS and MPLS, see Chapter 43, “Configuring PFC3BXL or PFC3B Mode

 

 

MPLS QoS.”

 

 

• QoS on the Cisco 7600 series routers (PFC QoS) uses some Cisco IOS modular QoS CLI (MQC).

 

 

Because PFC QoS is implemented in hardware, it supports only a subset of the MQC syntax.

 

 

• The PFC3 does not support Network-Based Application Recognition (NBAR).

 

 

• With a Supervisor Engine 2, PFC2, and MSFC2, you can configure NBAR on Layer 3 interfaces

 

 

instead of PFC QoS:

 

 

– The PFC2 provides hardware support for input ACLs on ports where you configure NBAR.

 

 

– When PFC QoS is enabled, the traffic through ports where you configure NBAR passes through

 

 

the ingress and egress queues and drop thresholds.

 

 

– When PFC QoS is enabled, the MSFC2 sets egress CoS equal to egress IP precedence in NBAR

 

 

traffic.

 

 

– After passing through an ingress queue, all traffic is processed in software on the MSFC2 on

 

 

interfaces where you configure NBAR.

 

 

– To configure NBAR, refer to this publication:

 

 

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t8/dtnba

 

 

rad.htm

 

 

 

This chapter contains these sections:

•Understanding How PFC QoS Works, page 42-2

•PFC QoS Default Configuration, page 42-28

•PFC QoS Configuration Guidelines and Restrictions, page 42-49

•Configuring PFC QoS, page 42-55

•Common QoS Scenarios, page 42-112

•PFC QoS Glossary, page 42-122

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

 

OL-4266-08

42-1

 

 

 

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Cisco Systems OL-4266-08 manual A P T E R, 42-1
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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.
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