Knowledge United

What You'll Learn

• Cisco hierarchical network model as it pertains to an end-to-end enterprise network
• Specific requirements for implementing a VoIP network
• Implementing QoS on a converged network using Cisco's routers and Catalyst Switches
• Features and functions of the Security Device Manager on Cisco routers
• Key QoS mechanisms used to implement the DiffServ QoS model
• Configure Auto QoS for Enterprise
• Functions and features of Lightweight Access Points and Wireless LAN Controllers
• Operation of QoS in Wireless LAN environments
• Configure Wireless LAN Controllers (WLC) to manage Lightweight Access Points using LWAPP
• Configure client authentication techniques including WPA/PSK and server-based LEAP
• Configure the Wireless Control System (WCS) for centralized management of Wireless LAN Controllers

Who Needs to Attend

IT professionals, network administrators, and technicians who need to design, configure, or support a Cisco Network that utilizes Cisco Voice or Wireless technologies. This course is highly recommended for people pursuing CCNP, CCDP, and CCIE certifications.

1. Network Requirements

2. Cisco VoIP Implementations

• Introducing VoIP Networks
  • Benefits of VoIP when compared to traditional circuit-switched telephony
  • Components of a VoIP network
  • Analog connectivity options for legacy equipment to connect to a VoIP network
  • Digital interface options to connect VoIP equipment to PBXs or the PSTN
  • Three stages of a call
  • Compare the concept of distributed call control, where a voice gateway provides call control functions, to that of centralized call control, where the call control process is run by a call agent, such as Cisco Unified CallManager
• Digitizing and Packetizing Voice
  • Converting analog signals to digital signals
  • Converting digital signals to analog signals
  • Why voice is sampled at 8,000 bps for telephone calls
  • How a signal is quantized and combined with the Nyquist theorem to yield a standard voice channel bit rate of 64,000 bps
  • Common voice compression standards including bandwidth requirements and voice quality measurement
  • Purpose of a DSP in a voice gateway
• Encapsulating Voice Packets for Transport
  • Transporting digitized voice packets across a network in an RTP voice bearer stream
  • RTP and UDP in packetizing and encapsulating voice for transport across a network
  • How and when to reduce header overhead with cRTP
• Calculating Bandwidth Requirements
  • How the number of voice samples that are encapsulated impacts bandwidth requirements
  • Overhead for various Layer 2 protocols
  • How IPsec and GRE/LT2P tunneling affect bandwidth overhead
  • Calculating the total bandwidth required for a VoIP call
  • Operation of VAD and bandwidth savings associated with the use of VAD
• Implementing Voice Support in an Enterprise Network
  • Given an enterprise network topology diagram, identify the components that are necessary for VoIP support
  • Voice capabilities available on Cisco ISRs
  • Role of a call agent, such as Cisco Unified CallManager, in a VoIP implementation
  • Main IP telephony deployment models that may be used in an enterprise
  • Given a show running-config output from a Cisco router configured as a voice gateway, identify the sections of the configuration that are related to the voice implementation on the router
  • How CAC prevents calls from crossing overly busy links and how such calls can be rerouted by mechanisms, such as AAR, instead of simply being blocked

3. Introduction to IP QoS

• Introducing QoS
  • Four key quality issues with converged networks
  • How a lack of bandwidth can adversely impact QoS in a network and ways to effectively increase bandwidth on a link
  • How end-to-end delay can adversely impact QoS in a network and ways to effectively reduce delay
  • How packet loss can adversely impact QoS in a network and ways to manage packet loss so QoS is not affected
  • Defining QoS with respect to traffic in a network
  • Three key steps involved in implementing a QoS policy on a network
  • How traffic is recognized by type in a network and how those types resolve to QoS traffic classes
  • Defining QoS policies after traffic classes have been defined
• Identifying Models for Implementing QoS
  • Models for providing QoS on a network
  • Key features of the Best Effort model for QoS
  • Key features of the IntServ model for QoS
  • How RSVP enables the IntServ model to provide end-to-end QoS
  • Key features of the DiffServ model for QoS
• Methods for Implementing QoS
  • Methods for configuring and monitoring QoS on a network
  • CLI (nonmodularized) method of configuring QoS
  • MQC method of configuring QoS
  • AutoQoS methods of configuring QoS
  • Cisco SDM QoS wizard, including how to access it and the high level configurations that it can do
• Advantages

4. Implement the DiffServ QoS Model

• Introducing Classification and Marking
  • Purpose of packet classification
  • Purpose of packet marking
  • IP packet classification and marking at the data link layer
  • Purpose and function of the DiffServ model
  • Interoperability between DSCP-based and IP-precedence-based devices in a network
  • How DSCP values are determined and assigned to different PHBs
  • DSCP settings in the DiffServ Model
  • Data link to network layer interoperability between QoS markings
  • The term "QoS service class" and how service classes can be used to create a service policy throughout a network
  • How link layer and network layer markings are used to define QoS service classes and the different applications represented by each of these service classes
  • Trust boundaries and how they are used with classification and marking
• Using NBAR for Classification
  • Cisco IOS protocol discovery and classification mechanism known as NBAR
  • Types of applications supported by NBAR
  • Purpose of PDLMs in NBAR
  • NBAR protocol discovery
  • Cisco IOS commands required to configure and monitor NBAR protocol discovery
  • Cisco IOS commands required to configure NBAR to recognize static port protocols
  • Cisco IOS commands required to configure NBAR to recognize TCP and UDP stateful protocols
• Introducing Queuing Implementations
  • Need for congestion management mechanisms
  • Queuing algorithms
  • FIFO queuing algorithm
  • PQ algorithm
  • Round robin queuing algorithm and its variants
  • Primary components of a queuing mechanism
• Configuring WFQ
  • Detailed explanation of WFQ
  • Architecture and benefits of WFQ
  • Cisco IOS commands required to configure and monitor WFQ on a Cisco router
• Configuring CBWFQ and LLQ
  • Advanced queuing mechanisms of CBWFQ and LLQ
  • Detailed explanation of CBWFQ
  • Architecture and benefits of CBWFQ
  • Cisco IOS commands required to configure and monitor CBWFQ on a Cisco router
  • Detailed explanation of LLQ
  • Architectures and benefits of LLQ
  • Cisco IOS commands required to configure and monitor LLQ on a Cisco router
• Introducing Congestion Avoidance
  • Default mechanism for managing interface congestion with tail drop
  • Limitations of using tail drop as a congestion management mechanism
  • RED and how it can be used to prevent congestion
  • WRED and how it can be used to prevent congestion
  • Traffic profiles that are used in WRED implementations
  • Cisco IOS software commands that are required to configure CB-WRED
  • Cisco IOS software commands that are used to monitor CB-WRED
• Introducing Traffic Policing and Shaping
  • Purpose of traffic conditioning using traffic policing and traffic shaping
  • Benefits of traffic conditioning using traffic policing and traffic shaping
  • Features of traffic policing and traffic shaping
  • How a token bucket can be used by network devices to measure traffic rates
  • How traffic can be policed using a single token bucket scheme
  • Key traffic policing and shaping mechanisms available in Cisco IOS software and how each compares to the others
  • Points in a network where rate-limiting can most effectively be employed
• WAN Link Efficiency Mechanisms
  • Various link efficiency mechanisms and their functions
  • Purpose of Layer 2 payload compression and how Layer 2 payload compression affects throughput and delay
  • Purpose of header compression and how header compression affects throughput and delay
  • How VoIP packets are susceptible to increased latency when large packets, such as FTP transfers, traverse slow WAN links
  • LFI operation and how LFI reduces the delay and jitter of VoIP packets
  • Points in a network where link efficiency mechanisms can most effectively be employed
• Implementing QoS Pre-Classify
  • Purpose of VPNs
  • Purpose of pre-classification to support QoS in various VPN configurations
  • Situations where pre-classification is appropriate
  • VPN applications that support QoS pre-classification and situations where pre-classification is not appropriate
• Deploying End-to-End QoS
  • IP QoS SLA and SLA examples
  • Typical network requirements within each functional block which makes up an end-to-end network
  • Best practice QoS implementations and configurations within a campus LAN
  • Best practice QoS implementations and configurations on WAN CE and PE routers
  • Control plane and CoPP

5. Implement AutoQoS

• Introducing AutoQoS
  • How AutoQoS is used to implement QoS policy
  • Prerequisites for using AutoQoS and how it is configured on a network using CLI
  • Verify that AutoQoS is functioning on a network
• Mitigating Common AutoQoS Problems
  • QoS technologies that are automatically implemented on the network using AutoQoS
  • Known problems with AutoQoS that users have had to contend with
  • Using the show commands, isolate areas in the running AutoQoS configuration where the known problems typically occur
• Modify the QoS configuration created by AutoQoS

6. Implement Wireless Scalability

• WLAN QoS Implementation
  • Need for WLAN QoS
  • WLAN QoS
  • Current WLAN QoS Implementation
  • Configure QoS features on lightweight APs using WLC
• Introducing 802.1x
  • Need for WLAN security standards and why WLAN security is so important
  • Difference between authentication and encryption
  • How enhanced 802.11 security improves on basic 802.11 security
  • Basic concepts of 802.1x authentication
  • EAP Cisco Wireless
  • EAP-FAST
  • EAP-TLS
  • EAP-PEAP
  • WPA authentication process
• Configuring Encryption and Authentication on Lightweight Access Points
  • Configuring open authentication on the controller
  • Configuring pre-shared key authentication on the controller
  • Configuring web authentication on the controller
  • Configuring 802.1x on the controller
• WLAN Management
  • Compare wireless solutions using autonomous to wireless solutions using lightweight APs, identifying how the two solutions come together for a complete unified wireless network
  • How Cisco implements WLANs
  • Hierarchy of components that are required to build a WLAN
  • Basic features of WLSE for wireless feature set using autonomous APs and related products
  • Basic features of Cisco WCS for wireless feature set using lightweight APs and related products
  • Cisco WCS tracking options
  • Using monitor tab functions to manage the WLAN
  • Function of the 2700 Location Appliance
  • Basic Cisco WCS configuration
  • Add, change, and use maps in the Cisco WCS database
  • Cisco WCS rogue AP methodology