Network Quality: CoS, QoS, MPLS and SLAs

Network Quality: CoS, QoS, MPLS and SLAs

This module focuses on the network service provided by carriers to move VoIP packets, and how network traffic is identified, managed and prioritized, resulting in Class of Service offerings to meet Service Level Agreements.


You will learn about Service Level Agreements, how carriers use MPLS to manage flows of packets, Differentiated Services: different transmission characteristics for different kinds of traffic, and Classes of Service (CoS).


VoIP Module 6

Detailed Outline

6. IP Network Quality: CoS, QoS, MPLS and SLAs

6.1 Virtual Circuit Technologies

...... 6.1.1 Packet-by-Packet Routing

...... 6.1.2 Virtual Circuits

...... 6.1.3 Centralized Control of Routing Tables

...... 6.1.4 Prioritization

...... 6.1.5 MPLS Replaces Legacy Technologies

6.2 MPLS

...... 6.2.1 MPLS to Implement Virtual Circuits

...... 6.2.2 Labels and Forwarding Equivalent Classes

...... 6.2.3 Label Stacking

...... 6.2.4 Label-Switched Path Calculation

...... 6.2.5 Label-Switching Routers and Label Processing

...... 6.2.6 User-Network Interface: IP

6.3 Differentiated Services (Diff-Serv)

...... 6.3.1 Different Transmission Characteristics

...... 6.3.2 Classification

...... 6.3.3 Implementation

6.4 Meters, Markers, Shapers and Droppers

...... 6.4.1 Traffic Management

...... 6.4.2 Traffic Management Functions

6.5 Interworking Diff-Serv and MPLS

...... 6.5.1 Similarities between MPLS and Diff-Serv

...... 6.5.2 Diff-Serv Codepoint in MPLS Header

...... 6.5.3 Diff-Serv Codepoint Associated with Label

6.6 Using 802.1P for QoS

...... 6.6.1 Frame-Level Priority Tag

...... 6.6.2 802.1P as an Input to DS Classification

6.7 Implementing CoS: Queuing Techniques

...... 6.7.1 Implementing Prioritization

...... 6.7.2 Priority Queuing

...... 6.7.3 Weighted Round-Robin Queuing