© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE I Chapter 6 1 Characterizing the Existing Network Designing and Supporting Computer Networks – Chapter 3

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 2 Objectives  Diagram and document an existing network to identify strengths and weaknesses in the design.  Use CCO to determine the appropriate IOS version to support network requirements and download and install the appropriate IOS  Use CCO to determine the appropriate hardware features and install the upgrades using safe practices and procedures  Perform a wireless site survey  Organize collected data into a new network design

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 3 Diagram a Physical Network and Document the Existing Network Network documentation:  Logical and physical diagrams  Floor plans  Inventory lists for equipment and applications  Current network configuration files

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 4 Diagram a Physical Network and Document the Existing Network  Log in to network devices  Use Cisco IOS software commands to gain information on routers and switches

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 Diagram a Physical Network and Document the Existing Network  Create a logical network diagram showing existing addressing, routing, and network segmentation  Illustrate how information flows through the network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Diagram a Physical Network and Document the Existing Network  Create a modular block diagram  Simplify the network to show major functions

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 7 Diagram a Physical Network and Document the Existing Network  Identify and document the strengths and weaknesses of the existing network  Focus on finding ways to overcome weaknesses

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 8 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements Cisco CCO features and navigation:  Documentation  Tools  Downloads  Communities and training  News

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements  Use the show version command  Verify that the inventory list is correct  Obtain missing information

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 10 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements  Select the correct IOS image using the CCO IOS Feature Navigator

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements  Download the correct IOS  Store new IOS image on TFTP server  Transfer the file to the Cisco router or switch

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements Three stages of the router bootup process:  Perform the POST and load the bootstrap program  Locate and load the IOS software  Locate and execute the startup configuration, or enter setup mode

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 13 Use CCO to Determine the Appropriate Hardware Features and Install the Upgrades  Use datasheets to see what modules and interfaces are available  Determine the technologies and media a given device will support

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 Use CCO to Determine the Appropriate Hardware Features and Install the Upgrades Installing a new hardware option on a Cisco router or switch:  Turn off power  Remove blank faceplace  Install option module  Turn on power and check the new configuration

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 15 Perform a Wireless Site Survey  Preparation  Site survey  Security  Safety guidelines

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 16 Perform a Wireless Site Survey  Identify possible sources of signal interference  Identify physical infrastructure issues

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 17 Perform a Wireless Site Survey  Define customer requirements  Identify coverage areas  Determine preliminary access point locations  Measure signal strength

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 18 Organize Collected Data into a New Network Design Design requirements document:  Overall project goal  Project scope  Network requirements  Current state of the network

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Organize Collected Data into a New Network Design  Identify and record the overall goal of the proposed network design

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 20 Organize Collected Data into a New Network Design  Identify and record the scope of the proposed network upgrade

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 21 Organize Collected Data into a New Network Design  Identify and record the business goals and technical requirements of the proposed network design

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 22 Organize Collected Data into a New Network Design  Characterize the existing network in relation to the identified business goals and technical requirements

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 23 Summary  Ensure that network documentation is accurate and complete before designing an upgrade  Gather information using tools like Cisco Network Assistant  Organize the current network into a modular block diagram to identify where the network needs to be improved.  The Cisco CCO site provides valuable tools and documentation for the design process.  Before producing a wireless network design, it is usually necessary to do a wireless site survey.

© 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 24