Chapter 42 Configuring PFC QoS

Understanding How PFC QoS Works

These figures provide more detail about the relationship between QoS and the router components:

•Figure 42-2,Traffic Flow and PFC QoS Features with PFC3

•Figure 42-3,Traffic Flow and PFC QoS Features with PFC2

•Figure 42-4,PFC QoS Features and Component Overview

Figure 42-2shows traffic flow and PFC QoS features with a PFC3.

Figure 42-2 Traffic Flow and PFC QoS Features with PFC3

FlexWAN traffic

 

FlexWAN

 

Multilayer Switch

 

 

 

 

FlexWAN

 

Transmit

 

ingress port and

 

 

Feature Card

 

 

 

egress port and

 

 

 

 

 

 

 

 

 

 

 

 

FlexWAN traffic

enters switch

 

 

 

 

QoS features

 

 

(MSFC)

 

 

 

QoS features

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CoS = IP precedence for all traffic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(not configurable)

 

LAN traffic enters switch

OSM traffic

enters switch

LAN ingress port and QoS features

OSM ingress port and QoS freatures

Ingress

PFC3

QoS

PFC3

Layer 2 or 3

switching

Egress

PFC3

QoS

LAN egress port and QoS features

OSM egress port and QoS freatures

Transmit

LAN traffic

Transmit

OSM traffic

105757

CoS = 0 for all ATM and POS traffic (not configurable)

Figure 42-2shows how traffic flows through the PFC QoS features with PFC3:

•Traffic can enter on any type of port and exit on any type of port.

•DFCs implement PFC QoS locally on switching modules.

•For FlexWAN module traffic:

–Ingress FlexWAN QoS features can be applied to FlexWAN ingress traffic.

–Ingress FlexWAN traffic can be Layer 3-switched by the PFC3 or routed in software by the MSFC.

–Egress PFC QoS is not applied to FlexWAN ingress traffic.

–Egress FlexWAN QoS can be applied to FlexWAN egress traffic.

•For LAN-port traffic:

–Ingress LAN-port QoS features can be applied to LAN-port ingress traffic.

–Ingress PFC QoS can be applied to LAN-port ingress traffic.

–Ingress LAN-port traffic can be Layer-2 or Layer-3 switched by the PFC3 or routed in software by the MSFC.

–Egress PFC QoS and egress LAN-port QoS can be applied to LAN-port egress traffic.

•For OSM traffic:

–Ingress OSM-port QoS features can be applied to OSM-port ingress traffic.

–Ingress PFC3 QoS can be applied to OSM-port ingress traffic.

–Ingress OSM-port traffic can be Layer-3 switched by the PFC3 or routed in software by the MSFC.

–Egress PFC3 QoS and egress OSM-port QoS can be applied to OSM-port egress traffic.

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

42-4

OL-4266-08

 

 

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Cisco Systems OL-4266-08 manual 2shows traffic flow and PFC QoS features with a PFC3, 42-4
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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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