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Cisco Systems - Starting a Router

Upon completing this lesson, you will be able to: Start a router and recognize the normal boot sequence Use the command-line interface to interact with the Cisco IOS software, given an operational router Use the online help facilities associated with the command-line interfaces, given an operational router | © 2002, Cisco Systems, Inc. All rights reserved. © 2002, Cisco Systems, Inc. All rights reserved. Starting a Router Objectives Upon completing this lesson, you will be able to: Start a router and recognize the normal boot sequence Use the command-line interface to interact with the Cisco IOS software, given an operational router Use the online help facilities associated with the command-line interfaces, given an operational router System startup routines initiate router software Router falls back to startup alternatives if needed Initial Startup of the Cisco Router Purpose: This slide describes a high-level overview of the startup sequences on the router. Emphasize: A detailed flowchart covers this in much more detail in Chapter 6, “Catalyst Switch Operations.” Config register is also covered in Chapter 6. The startup routines for Cisco IOS software have the goal of starting router operations. The router must deliver reliable performance connecting the user networks it was . | © 2002, Cisco Systems, Inc. All rights reserved. © 2002, Cisco Systems, Inc. All rights reserved. Starting a Router Objectives Upon completing this lesson, you will be able to: Start a router and recognize the normal boot sequence Use the command-line interface to interact with the Cisco IOS software, given an operational router Use the online help facilities associated with the command-line interfaces, given an operational router System startup routines initiate router software Router falls back to startup alternatives if needed Initial Startup of the Cisco Router Purpose: This slide describes a high-level overview of the startup sequences on the router. Emphasize: A detailed flowchart covers this in much more detail in Chapter 6, “Catalyst Switch Operations.” Config register is also covered in Chapter 6. The startup routines for Cisco IOS software have the goal of starting router operations. The router must deliver reliable performance connecting the user networks it was configured to serve. To do this, the startup routines must: Make sure that the router comes up with tested hardware. Find and load the Cisco IOS software that the router uses for its operating system. Find and apply the configuration statements about router-specific attributes, protocol functions, and interface addresses. The router will make sure that it comes up with tested hardware. When a Cisco router powers up, it performs a POST. These diagnostics verify the basic operation of the CPU, memory, and interface circuitry. After verifying the hardware functions, the router proceeds with software initialization. Some startup routines act as fallback operations that are able to perform the router startup should other routines be unable to do so. This flexibility allows Cisco IOS software to start up in a variety of initial situations. Unconfigured Versus Configured Router Bootup Output from the Router Purpose: This slide describes the difference between the console output of an unconfigured .