Network Design•Network design is the ultimate target of our work, the culmination of network analysis and architecture processes. –Whereas network analysis provides understanding, and network architecture provides conceptual (technology and topology) descriptions of the network, network design builds upon these to add physical detail and vendor, product, and service selections to the network.Design Concepts
Network Design•Depending on the amount of detail it includes, the product of design can be categorized as –First-order:•It is not intended to be used to install or configure devices, but rather as a product for management, providing greater detail than the architecture but not so much as to be confusing.–Second-order:•Greater amount of detail, including product types, hardware and software revision levels, device configurations, and a more explicit layout of the connectivity between devices, as well as with service providers.–Third-order:•Adds location detail such as rack layouts and where each device is located in a rack. It shows the explicit connectivity between devices including descriptions and diagrams of cable runs. Design Concepts
Network Design•The key products of a network design are:–Network blueprints:describe the physical aspects of your network design•Locations of network devices, servers, the cable plant, physical security and secure locations; how devices are interconnected, their interface types and speeds; as well as device specific and service-specific information.•Blueprints usually also show the support infrastructure for the cable plant: building entrances, conduit, cable runs, and the like.Design Products
Network Design•Network blueprints may consist of a single diagram or several diagrams of the network, depending on your needs and the size of your project.Design Products
Network Design•The key products of a network design are:–Component Plan:Describes the mechanisms associated with that function, internal interactions among those mechanisms, and external interactions among functions.•Can be complementary to the network blueprints, often providing function-specific information that normally would not be on blueprints. –For example, a component plan that describes security for the network might include configuration information for security devices, such as sets of ACLs or VPNs, and where in the network each set would be appliedDesign Products
Network Design•The key products of a network design are:–Vendor and service provider selections: Using products from network analysis and architecture we develop an initial set of options and then develop complete sets of candidate options and evaluation criteria;•Then gather data to apply to the evaluations; refine our evaluation criteria and develop ratings; and then apply criteria and ratings to prioritize the candidate options, reducing the number of options to one or a few optimal choices.