The course describes policy-based QoS architecture which supports infrastructure for delivering QoS based applications. Finally, the course introduces some emerging trends in IP QoS.
It explains the techniques, principles and technology associated with implementing IP Quality of Service (QoS). The IETF's Integrated Services standard and accompanying protocols such as RSVP, RTP and RTCP are described, and how RSVP is used as a QoS signaling protocol to request a certain QoS is covered. This course describes the IETF's Differentiated Services standard and how it can be used to provide QoS on a per-hop basis, and explains how IntServ and DiffServ are used to provide IP QoS support in routers. MPLS and GMPLS can be used to improve routing efficiency and provide a basis for good QoS support is described. This course also explains how IPv6 and class-based queuing all help to provide IP QoS.
Objectives
How QoS works-and why it is crucial to networks that must deliver integrated voice, data, and video traffic
Implementing QoS in IP environments
Leveraging QoS capabilities built into IPv4 and IPv6
Understanding the Resource Reservation Protocol (RSVP), Real-Time Transport Protocol (RTP), and DiffServ
Explain the techniques, principles and technology associated with implementing IP Quality of Service (QoS)
Describe the IETF's Integrated Services standard and accompanying protocols such as RSVP, RTP and RTCP
Describe the IETF's Differentiated Services standard and how it can be used to provide quality of service on a per-hop basis.
Explain the various queuing and congestion avoidance techniques used by QoS-aware routers to implement services such as IntServ and DiffServ.
and more ...
Course Outline
Executive Summary
Why need any QoS?
Basic of Quality of Service in Data Networks
Qos in Data Networks: Protocols and Standards
QoS in Packet Switched Networks
Efforts to define QoS
QoS parameters
Grade of Service
Class of Service
Why QOS?
Congestion
Provisioning and Supporting QOS
The QOS Models
Scope of QOS Service and QOS Domains
Service Level Agreements (SLAs)
SLA Monitoring Points
Applying QoS
At the Core
At the Edge
QoS in Internet today
How does the Internet provide QoS today?
What are the limitations with the current QoS strategy
QoS Requirements
What are the QoS requirements?
Challenges for deploying IP QoS
Policy based QoS architecture
QoS Models
Application approach vs. aggregated approach
Introduction to IP QoS models
Integrated Services Approach (IntServ)
Integrated Service approach
Limitations of the Integrated Services approach
ReSerVation Protocol (RSVP)
Differentiated Services Approach (DiffServ)
Differentiated Services approach
DiffServ protocol
DiffServ implementation
Multiprotocol Label Switching (MPLS) Protocol
Traffic management functions
Frame Relay Protocol and QoS Mechanisms
ATM Protocol and QoS Mechanisms
Common Open Policy Standard (COPS)
Emerging Trends in QoS
What is QoS?
Why do we need it?
Things to Consider
Isochronism
Delay
Loss
Jitter
Others
QOS Concepts and Operations
Statistical Multiplexing
Congestion Problems
Flow Control Mechanisms
Explicit and Implicit Flow Control
Problems with Internet Flow Control Services
Congestion, Traffic Control, and Connection Admission Control. Arrival Rate and Traffic Load
Queue Management Operations
Operations at the Final Destination
Buffer Size, Packet Size, and Traffic Loss
Error Recovery in High-Speed Networks
Monitoring and Traffic Tagging
Associating Labels with QOS Operations
Controlling Data Traffic
QOS Evolution
Network Interfaces
Value of the Interface Concept
The QOS Layered Model
Connection-Oriented and Connectionless Interfaces
QOS in Connection-oriented and Connectionless Networks
QoS in ATM, Frame Relay
X.25 Features
Frame Relay Features
A TM Features
IP-Based Layer 2 and 3 Switching and Routing
Label Switching
Internetworking IP, X.25, Frame Relay, and ATM
ATM vs IP
Internetworking Frame Relay and ATM
Network Interworking and Service Interworking
Comparison of Frame Relay and ATM
AAL 5 Operations for Frame Relay Support
Mapping QoS Between ATM and Frame Relay
Congestion Management
Mapping Frame Relay and ATM Connection Identifiers
Correlation of SVC Operations
Mapping the Congestion Notification Bits
Mapping QOS between Frame Relay and ATM.
IP and FR/ATM
Quality of Service over IP
Related Internet Protocols
Different Types of Applications
Real-Time and Non-Real-Time Applications
Layer 4 Port Numbers
Transmission Control Protocol (TCP)
TCP QoS Controls
User Datagram Protocol (UDP) QoS Controls
Real-Time Transport Protocol / RTP Control Protocol (RTP/RTCP) Applications
Differentiated Services
Integrated Services
QoS Routing
RSVP
MPLS, GMPLS, IP Switching, and MPOA
Multimedia Networking
Voice over IP
IETF Working Groups
Differenticated Services (diffserv)
Integrated Services (intserv),
Integrated Services over Specific Link Layers (issll)
Resource Reservation (rsvp)
Resource Allocation Protocol (rap)
Policy Framework (policy)
Common Control and Measurement Plane (ccamp)
Internet Traffic Engineering (tewg)
Multiprotocol Label Switching (mpls)
Integrated Services
Objectives of RSVP
Principles of Operation
Controlled Load Service
Guaranteed Service
Controlled-load Network Element Service
Resource Reservation Protocol (RSVP)
RTP/RTCP
Packet Formats Guaranteed
QoS routing
Integrated Services and ATM
Bandwidth allocation in subnets
Differentiated Services
Differentiated Services (DiffServ)
Objectives of DiffServ
Principles of Operation
Traffic Conditioning
IP Class Selector PHB
Supporting DiffServ in IPv4
Supporting DiffServ in IPv6
Relationship with MPLS
Per-Hop-Behavior Groups
Service Examples
Use of RSVP with Differentiated Services
DiffServ Architecture
Control Plane and Data Plane
Comparison of QOS Technologies
Traffic Classification and Conditioning
Internet QOS Protocols
QOS in IPv4 and IPv6
Summary of Changes
IPv4 Connectionless Service and QoS
Type-of-Service (TOS) and Classification of Traffic
IPv6 Traffic Class and Flow Label
Routing Protocols and QoS
Considerations in Routing
Why IPv6?The IPv6 Address
The IPv6 Datagram
IPv4 and IPv6 Headers
IPv6 Extension Headers
Fragmentation Header
Hop-by-Hop Options Header
Security Extension Headers
Routing Header
Destination Options Header
Internet Control Management Protocol (ICMP) for IPv6
Interworking IPv4 and IPv6
TCP and its Effect of QOS
How TCP Handles User Traffic
Interactive Traffic
Bulk Traffic
Role of Multicasting, RTP, RTCP, and RSVP in the QOS
Traffic Management
FIFO Routers v QoS Routers
Fair Queuing
Weighted Fair Queuing
Class-Based Queuing
Hierarchical Link Sharing
Custom Queuing
Priority Queuing
TOS Field
IP Precedence
Header Compression
Traffic Engineering with MPLS
Congestion Management
RED
WRED
Tail Drop
ECN
Differentiated Services
Why MPLS and GMPLS?
MPLS: The need for a new solution
Challenges for new IP centric networks
Limitations of traditional IP networking
Achieving QoS
Understanding the fundamentals
Basic MPLS operation
Forwarding Equivalence Class
Label encoding, distribution and binding
Traffic Engineering: The need for Constrained and Explicit Routes
This course is designed for individuals seeking an overview of the IP Quality of Service architectures in the Internet.This course will provide a powerful state-of-the-industry IP QoS fundamentals for people who are involved with : Network Architecture, Service and Network Integration, Network Management, Support Systems and Development, and Network Operations Center (NOC).
