CCNA Dis4 - Chapter 3 – Characterizing the Existing Network_ppt [Compatibility Mode]

8/3/2019 CCNA Dis4 - Chapter 3 Characterizing the Existing Network_ppt [Compatibility Mode]

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Chapter 3 Characterizing the ExistingNetwork

CCNA Discovery 4.0


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Introduction

Hc vin cng ngh thng tin Bach Khoa - Website: www.bkacad.com
http://www.bkacad.com/http://www.bkacad.com/


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Introduction



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Introduction



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Introduction



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Introduction



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Documenting the Existing Network



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Creating a Network Diagram

The NetworkingCompany designer examines the existingnetwork to: Determine if the design goals are realistic and feasible

Determine if the existing network meets the expectations for scalability,availability, security, and manageability

Identify where new equipment, infrastructure upgrades, and new servicescan be integrated

Ensure that old and new network devices, media, and functions can worktogether

Upgrading the Stadium Network Better manage its existing voice, video, and data networks

Improve customer service

Reduce costs



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The network documentation should include: Logical and physical diagrams of the network

Floor plans showing the location of wiring closets and wiring runs

Inventory lists of installed network equipment

Current network configuration files

Inventory lists of network applications

Producing a Network Topology Map



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Obtaining Information About Devices and Data Routes show version

show running-config

show ip route

show cdp neighbors detail

show controllers show tech-support

show vlan

show vtp

show spanning-tree



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Activity 3.1.1.4



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Lab Activity 3.1.1.5



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Diagramming the Logical Architecture

Creating an Existing Network Overview Diagram:The first diagram that the network designer creates is a high-level view of all the

stadium network sites

The main stadium network

The souvenir shop

The ticket outlet locations Connectivity to remote sites

Connectivity to business partners

Creating Network Segment DiagramCreates diagram for the logical and physical layouts of the networks installed at

each of the various sites

The location of the network equipment and wiring closets

The logical addressing information

The naming information



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Creating a Local Diagram of the Main Stadium Lan



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Lab Acitivity 3.1.2.3



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Developing a Modular Diagram

Hc vin cng ngh thng tin Bach Khoa- Website: www.bkacad.com


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Strengths and Weaknesses of the Existing Network

Strengths of the Existing Stadium Network The designer reviews the current voice and video network

documentation to determine the locations of equipmentand the various groups who use the services.



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Strengths: New wiring and adequate wiring closets

Adequate space for a new data center

Servers and PCs are current models and will not need to be replaced

Some existing network switches and routers can be used in the new design

Weaknesses: Flat network design

No Distribution Layer

No true Core Layer

Servers poorly located

Multiple networks that can be difficult to maintain Inadequate IP addressing structure

No dedicated bandwidth for WAN connectivity

Poorly-implemented wireless

Limited security implementations



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Updating the Existing Cisco IOS



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Cisco CCO Features and Navigation

The Cisco.com web site offers tools and online resources The tools and resources include the following:

Documentation - Hardware and software configuration and verification, aswell as troubleshooting Cisco products and technologies

Tools - Troubleshooting, installation, assessment, and service requests

Downloads - Software, specific file releases, and technical supportapplications

Communities and Training - Information on the Networking ProfessionalsConnection, attending Technical Support Seminars, and other trainingopportunities

News - Current topics reported in the Cisco Technical Support Newsletter

Access to these resources depending upon the type ofuser ACC



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Registering 3.2.1.1



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Investigating the Installed Cisco IOS software



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Investigating the Installed Cisco IOS software

When the Cisco IOS software on a switch or router isupgraded, the device needs to be rebooted. This processtakes the device out of service for a short period of time.

Upgrade have to test



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Choosing an Appropriate Cisco IOS Image

Networking Company staff must check that each devicehas enough flash and RAM memory to support the newIOS files

Archive IOS



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Download and Install Cisco IOS software

Step1: Select a IOS Software Image Memory requirement

Interface and Module Support

Software Feature Support



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Step 2: Identify the Device File System to Copy the Image:The NetworkingCompany staff uses the show file systemscommand output to locate the Cisco IOS files or images.

Step 3: Verify that the TFTP Server Has IP Connectivity tothe Device



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Step 4: Back Up the Current Configurations to Prepare forthe Upgrade

Step 5: Copy the IOS Image to the Device: copy tftp flashcommand

Activity 3.2.4.3



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The Router Startup Process



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Upgrading Existing Hardware



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Investigating Installed Hardware Features

Activity 3.3.1.1



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Investigating Appropriate Hardware Options

Activity 3.3.2.1



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Activity 3.3.2.2



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Hc vin cng ngh thng tin Bach Khoa- Website: www.bkacad.com


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Install a New Hardware Option

Step 1: Turn Off Power to the Router Step 2: Remove the Blank Faceplate from the Slot Step 3: Install the Option Module Step 4: Turn on Power to the Router and Check the New Configuration Activity 3.3.3.1



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Performing a Wireless Site Survey



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Visiting the Customer Site

The next step is to evaluate the wireless LAN deployment Before the wireless network design is finalized, the

NetworkingCompany staff performs a site survey todetermine the best use and placement of the wirelessnetworking components.



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The NetworkingCompany guidelines for wireless sitesurvey

Preparation Schedule the site survey with the customer.

Dress appropriately for the task.

Wear or carry company credentials.

Bring the proper equipment (create a standard checklist to ensure thatall necessary materials are included).

Notify stadium personnel when the staff will arrive and how long thesite survey should take.



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Site Survey Check in with the proper staff upon entry into the stadium.

Work quickly and professionally to instill a sense of confidence in thecustomer.

Answer questions politely and as completely as possible.

Write down any questions that must be answered by other staffmembers.

Inform the customer of the survey procedures.

Report back to the customer staff before leaving the premises to informthem of the successful completion of the survey.

Security

Safety Guidelines Follow the recommended safety guidelines to ensure proper operation

and safe use of the wireless devices.

Obtain customer approval before touching or attaching devices to anyexisting networking equipment.



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Some site visit requirements may include:Access restrictions

Clothing

Safety equipment

Identification BadgesHours of operation

Security

Prohibited items



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Physical Network Considerations



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Areas of concern to the designer include: The many microwave ovens that are located in the concession areas and

the luxury boxes

Wireless telephones and headsets that are used by the reporters andnewsmen

Elevator shafts that are located near the outer areas of the restaurant and

the luxury suites

Thick concrete pillars and walls between the luxury suites



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Activity 3.4.2.2



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Wireless Site Survey and Planning

Performing a site survey consists of the following steps: Step 1: Define Customer Requirements Step 2: Identify Coverage Areas Step 3: Determine Preliminary AP Locations

Step 4: Measure Signal Strength



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Wireless Site Survey and Planning

The NetworkingCompany staff performs the following steps: Step 1: Measure the signal strength and speed of a link as they walk

away from the AP.

Step 2: Record the readings and measure the distances to the APwhen the quality or link speed changes.

Step 3: Mark the areas where signals are acceptable on a floor plan.



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Game 3.4.3.5



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Documenting Network Design Requirements



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Creating a Network Design Requirements Document

The NetworkingCompany staff has now completed thePrepare and Plan phases of the network upgrade lifecycle. The first two sections of the Design Requirements

document are the Overall Project Goal and the ProjectScope.

Overall Project Goal This section states the overall goals of the upgrade. It also specifies how

this upgrade will help the stadium management company become moresuccessful.

Project Scope This section outlines the physical areas, applications, and user groups

affected by the network upgrade. It may list components of the network thatare beyond the scope of the network upgrade, such as server orapplication updates.



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Two other important sections of the Design Requirementsdocument are Network Requirements and Current State ofthe Network.

Network Requirements State of the Network



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Overall Project Goal

It is important to think about the primary purpose of thenetwork design projectActivity 3.5.2.1



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Project Scope

Activity 3.5.3.1



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Activity 3.5.3.2



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Business Goals and Technical Requirements

The Network Requirements section has the following foursubsections: Business Goals

Technical Requirements

Users

Applications Business Goals



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Technical Requirements:Scalability

Availability

Security

Manageability



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Users In this section of the Design Requirements document,

the different user groups and their access requirementsare listed.

ApplicationsThe network traffic characteristics and requirements of

various applications affect the design of the network



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Activity 3.5.4.4



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Existing Network Characterization

The final section of the Design Requirements documentincludes the following information: All of the network diagrams that the NetworkingCompany creates to

illustrate the existing network

The names and IP addresses of servers and important networkingcomponents

The existing network strengths and weaknesses and how they impact thebusiness goals



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Existing Network Characterization



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Activity 3.5.5.2



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Summary



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Summary


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Summary


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Summary



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Documents

CCNA Dis4 - Chapter 3 – Characterizing the Existing Network_ppt [Compatibility Mode]