Characterizing the Existing Network Designing and Supporting Computer Networks – Chapter 3 ITE I Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5 Diagram a Physical Network and Document the Existing Network Create a modular block diagram Simplify the network to show major functions ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements Cisco CCO features and navigation: Documentation Tools Downloads Communities and training News ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9 Use CCO to Determine the Appropriate IOS Version to Support Network Requirements Select the correct IOS image using the CCO IOS Feature Navigator ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13 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 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14 Perform a Wireless Site Survey Preparation Site survey Security Safety guidelines ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15 Perform a Wireless Site Survey Identify possible sources of signal interference Identify physical infrastructure issues ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16 Perform a Wireless Site Survey Define customer requirements Identify coverage areas Determine preliminary access point locations Measure signal strength ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17 Organize Collected Data into a New Network Design Design requirements document: Overall project goal Project scope Network requirements Current state of the network ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18 Organize Collected Data into a New Network Design Identify and record the overall goal of the proposed network design ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19 Organize Collected Data into a New Network Design Identify and record the scope of the proposed network upgrade ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20 Organize Collected Data into a New Network Design Identify and record the business goals and technical requirements of the proposed network design ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21 Organize Collected Data into a New Network Design Characterize the existing network in relation to the identified business goals and technical requirements ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22 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. ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23 ITE 1 Chapter 6 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24