Introducing Cisco Network Service Architectures © 2004 Cisco Systems, Inc. All rights reserved. Introducing the Network Design Methodology ARCH v1.21-1. - презентация

1 Introducing Cisco Network Service Architectures © 2004 Cisco Systems, Inc. All rights reserved. Introducing the Network Design Methodology ARCH v1.21-1

2 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Network Design Process

3 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Conceptual Design Phase

4 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Intermediate Design Phase

5 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Detailed Design Phase

6 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Validating Your Network Design Prototype of the design An experimental model of the network design Usually done in a lab environment Pilot of the design A scaled-down model of the network design Usually done in a production environment Validating the network design with a pilot or prototype is critical.

7 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Key Decisions for Validating the Design What are the success criteria? What are the failure criteria? What resources (people and equipment) do you need to conduct the pilot or prototype? How long should your pilot or prototype run? What impact will the pilot or prototype have on the current network?

8 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Steps to Build a Prototype 1. Create a plan for the prototype. Determine what part of the network you will include in the prototype. 2. Build the prototype network based on your design documents. 3. Measure and document the results of the prototype. 4. Compare the actual results to the expected results. 5. Determine if the prototype is a success or a failure. –If the prototype is successful, build the network design. –If the prototype is not successful, revise the design and conduct the prototype again.

9 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Steps to Build a Pilot 1. Create a plan for the pilot. 2. Build the pilot network based on your design documents. 3. Measure and document the results of the pilot. 4. Compare the actual results to the expected results. 5. Determine if the pilot is a success or a failure. –If the pilot is successful, go live. –If the pilot is not successful, revise the design.

10 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Tools to Help Validate Your Design Cisco IOS software commands Protocol analyzer Simulation tools

11 © 2004 Cisco Systems, Inc. All rights reserved. ARCH v Summary The design process emphasizes that a good network design is more than just a topology diagram. It includes all of the supporting information needed to realize the design. The process defines three primary phases: –Conceptual design –Intermediate design –Detailed design The conceptual design outlines a network solution that meets enterprise needs. The intermediate design is a more detailed description of the network solutions. Finally, the detailed design describes the final stage of diagrams and documentation before physical installation and configuration. Validating the network design to ensure that all components operate as expected is critical to the success of any network design project.

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