Click on the drop down menu above to view available dates and location. To register, click on acceptable date. If you don't see an acceptable date, please contact us and we will find a solution for you. Optimizing Converged Cisco® Networks - ONT Duration: 5 days The introduction of new technologies and applications into modern converged networks brings a new set of challenges to the network administrator. In this course, you will learn the characteristics of real-time multimedia traffic, such as voice, and you'll investigate the importance of Quality of Service (QoS) management on the network and learn about the application of wireless technologies to the enterprise. Get an introduction to Cisco's Lightweight Wireless Access Point architecture, and cover such areas as Wireless LAN (WLAN) configuration, QoS for wireless, and wireless security techniques for authentication and data encryption. You will also explore the management of WLAN Controllers across the enterprise using Cisco's Wireless Control System. 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 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
Course Outline 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 Role of RTP and UDP in 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 Exclusive: Using ISRs as voice gateways in CallManager environments Role of a call agent, such as Cisco Unified CallManager, in a VoIP implementation Exclusive: Extended discussion of CallManager features Main IP telephony deployment models that may be used in an enterprise Exclusive: Scaling CallManager environments using intercluster trunks and gatekeepers Exclusive: Overview of call control protocols: H.323, SIP, and MGCP Exclusive: Dial Plan/Route Plan design in VoIP environments 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 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 per-hop behaviors (PHBs) DSCP settings in the DiffServ Model Data link to network layer interoperability between QoS markings The term "QoS service classand 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 Exclusive: How switches preserve or modify Layer 2 and Layer 3 markings Trust boundaries and how they are used with classification and marking Exclusive: Queuing mechanisms on Cisco switches
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 Priority queuing (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 Exclusive: Dual token bucket mechanisms for single rate/bursting or dual rate policing 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 Exclusive: LFI features of PPP and Frame Relay encapsulations 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 Policing (CoPP)
5. Implement AutoQoS 6. Implement Wireless Scalability Labs Lab 1: ONT Lab Setup and Initialization Prepare the pod for the remaining lab practice exercises in the course. Lab 2: Placing and Examining VoIP Calls Place VoIP calls with different codecs and examine call status information and statistics of the IP packets that are exchanged between the workstations. Configure CIPC, a software phone application that is installed on a virtual workstation to register with CME, a call agent that runs on an IOS router. Place a call from one workstation to another using CIPC with the default codec (G.711). Display voice call statistics on the CIPC screen and obtain network and call information by browsing to the web server of CIPC. Capture RTP packets and analyze them using Ethereal, a network protocol analyzer software. Reconfigure CIPC to register with CME using a different device name configured for a different codec (G.729). Place a call from one workstation to another using CIPC with the G.729 codec. Use the same tools used on the previous call to note the differences caused by the codec change. Exclusive: Twice as many phones per pod as the standard lab, allowing complete pod independence
Lab 3: Case Study: Selecting a Converged Network Strategy Identify the type of QoS problem in progress and suggest a possible solution to mitigate the QoS problem. Lab 4: Introducing MQC and the SDM QoS Wizard Use the MQC to configure a basic service policy and launch the SDM QoS wizard. Lab 5: Configuring NBAR Discover network applications and traffic using NBAR protocol discovery. Configure classification of discovered applications using NBAR classification. Configure class-based marking.
Lab 6: Configuring FIFO and WFQ Queuing Mechanisms Configure FIFO queuing on Cisco routers. Configure WFQ queuing on Cisco routers. Interpret output of show interface command to monitor and verify the FIFO and WFQ operation on the serial lines.
Lab 7: Configuring LLQ Queuing Mechanism Configure LLQ on a Cisco router to provide bandwidth guarantees. Use the proper show commands to monitor and verify the LLQ. Use Cisco IOS monitoring commands and network connectivity tools (ping) to gather network response time data.
Lab 8: Class-Based Header Compression Lab 9: Configuring LFI Configure and monitor MLP with interleaving on a PPP link. The generated traffic will be interleaved on the MLP link according to the predefined policy map. Ping will be used to test the PPP connectivity. Lab 10: Configuring QoS Pre-Classify Lab 11: Configuring QoS with Cisco AutoQoS Activate the AutoQoS Discovery on the pod router to perform traffic analysis on low bandwidth PPP serial interface. Enable the AutoQoS for Enterprise feature on the pod router low bandwidth PPP serial interface. Use Cisco IOS monitoring commands and network connectivity tools (ping) to gather network response time data.
Lab 12: Using MQC to Tune QoS Mechanisms Configured With AutoQoS Revise the AutoQoS configuration from Lab 11 by tuning classification using MQC and marking using class-based marking. Lab 13: Troubleshooting Converged Networks Troubleshoot a converged network in order to bring it back to total functionality. Use several show commands to solve these problems: Lab 14: Setting Up the Wireless LAN Controller Create a basic configuration for the wireless LAN controller. The purpose of this lab is to establish initial connectivity to the controller through the console, become familiar with the startup wizard that runs on initial startup, and complete the necessary steps to establish a SSL web connection to the controller. In this activity, we create the initial configuration of the wireless LAN controller, using the CLI and continue with additional configuration steps using the GUI. Lab 15: Basic Security Configuration Using WPA-PSK WEP key encryption is not secure. Therefore the majority of new clients are supporting WPA-PSK authentication. In this lab exercise, configure a new WLAN ID on the WLC using WPA-PSK, and test the configuration by monitoring client association to the AP. Lab 16: Advanced Security Configuration Using LEAP Server-Based Authentication WEP key encryption is not secure enough and WPA-PSK improvements are the first step to improve wireless security. The next step is to enhance security by using server-based authentication. Cisco wireless LAN controllers support a wide range of different client to server-based authentication types. In this lab exercise, configure the authentication for client association using LEAP. After configuration, verify the LEAP authentication by monitoring clients associated to the AP. Configure LEAP server-based authentication on WLC. Monitor your configuration. Enhanced: Cisco 7920 wireless phones used as clients to test LEAP authentication
Lab 17: Configuring Wireless Control Systems (WCS) for WLANs The WCS provides centralized management of WLCs and their associated APs. In this lab, connect to the WCS, add the WLAN controller, review the status, add maps to the WCS, and place APs on the map.
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