Cisco network design

For review, the layers are described as follows:. When using Layer 3 devices at the distribution layer, every router functions as a gateway for a limited number of access layer users. As Figure shows, the primary Cisco Enterprise Architecture modules include.

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The Layer 2-only access design is a traditional, slightly cheaper solution, but it suffers from optimal use of links between access and distribution due to spanning tree. Enterprise networks and ISPs often use more advanced protocols, such as link-state protocols, because of their hierarchical design and ability to scale for large networks. Outages in the enterprise network prevent the business from performing normal activities, which can result in a loss of revenue, customers, data, and opportunities.

There are many considerations when implementing a wireless network, such as the types of wireless devices to use, wireless coverage requirements, interference considerations, and security considerations.

Cisco Network Design - Perfect Cisco network diagram design tool, free download

Edraw Max can use the built-in Cisco symbols to create and present your Cisco network diagrams in minutes. Two such prime examples are IP phones and wireless APs, both of which extend the connectivity out one more layer from the actual campus access switch. Redundant paths in a switched network support high availability.

You can select the sub shapes to fill or change its sesign.

Figure Enterprise Architecture. Redundancy is an important part of network design for preventing disruption of network services by minimizing the possibility of a single point of failure. For example, adding a new wing to your office building may be as simple as adding a new distribution layer with an access layer while adding capacity to the core layer.

Connecting Networks Companion Guide. However, remember that a key purpose of having a distinct campus core is to provide scalability and to minimize the risk from and simplify moves, adds, and changes in the campus network. Cisco uses its own brand of networking symbols.

Cisco Network Design - Perfect Cisco network diagram design tool, free download

For instance, consider the example in Figure All nonbackbone areas must directly connect to area 0. The term building implies but does cieco limit the cjsco of layers as physical buildings. The distribution layer, in contrast, serves multiple purposes. Routers, or multilayer switchesare usually deployed in pairs, with access layer switches evenly divided between them. Every time you go to an office to work or go to class at school, college, or university, you will use a campus network to access critical applications, tools, the Internet, and so on over wired or wireless cieco.

The access layer module contains Layer 2 or Layer 3 switches to provide the required port density. Figure illustrates, at a high level, a hierarchical view of campus network design versus a flat network.

Cisco Network design software - Cisco Community

EIGRP contains many features that are not found in any other routing protocols. Layer 3 designs also require careful planning with respect to IP addressing.

If Layer 3 routing is extended to the access layer, the distribution layer generally cksco a default route to access layer switching while leveraging dynamic routing protocols when communicating with core routers. Using the three-layer hierarchical design model helps organize the network. Figure Access Layer. For example, Figure shows the following failure domains:.

Figure shows examples of some more advanced network requirements. This helps the network designer and architect to optimize and select the desgn network hardware, software, and features to perform specific roles for that network layer. Therefore, a two-tier hierarchical design where the core and distribution layers are collapsed into one layer is often more practical.

See some network diagram examples:. About Affiliates Cisco Systems, Inc. The key principle of the hierarchical design is that each element in the hierarchy has a specific set of functions and services that it offers and a specific role to play in the design. Routers reach a FULL state of adjacency when they have synchronized views on their link-state database.

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