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Business Support - NETWORK DESIGN

  • Network planning and design is an iterative process, encompassing topological design, network-synthesis, and network-realization, and is aimed at ensuring that a new telecommunications and computer network or service meets the needs of the subscriber and operator.

  • Computers and information networks are critical to the success of businesses, both large and small. They connect people, support applications and services, and provide access to the resources that keep the businesses running. To meet the daily requirements of businesses, networks themselves are becoming quite complex.


  • TCCB take a structured approach to designing your network. Before we start we verify the business goals and technical requirements. This is critical as it gives a vision of what the needs of the business is 1, 3 and even 5 years’ time.


  • While gathering requirements, we identify the issues that will affect the entire network and those that affect only specific portions. By creating a topology we can isolate areas of concern and identify the scope of the project. Failure to understand the impact of a particular requirement often causes a project scope to expand beyond the original estimate. This oversight can greatly increase the cost and time required to implement the new design. This is a common issue that results is serious cost and time escalation

As an example some of the following questions will be explored:

  • What will be the benefits of a hierarchal network design?

  • What design methodology was used by previous network design?

  • What are the design considerations for the core, distribution, and access layers?

  • What are the design considerations for the network enterprise edge?

  • What are the design considerations that must be met to support remote workers?

  • What are the design considerations for supporting enterprise wireless and/or data centre/server farms?

We will then determine the features and functions required to meet the needs identified in the first step. This is followed by a network-readiness assessment. Once the network readiness has been completed, we would have identified areas of soft and hardware challenges as well as potential impacts upon people, systems and more importantly risks to the business. With this in mind, we can structure our designs around scalability, meaning a re-design is not required when things change.

Next, a design solution along with acceptance test plan is created. We will consider aspects such as:

  • Scalability

  • Availability

  • Security

  • Manageability

To meet the four fundamental design goals, a network must be built on an architecture that allows for both flexibility and growth.

  • In networking, a hierarchical design is used to group devices into multiple networks. The networks are organized in a layered approach. The hierarchical design model has three basic layers:

    • Core layer: Connects distribution layer devices

    • Distribution layer: Interconnects the smaller local networks

    • Access layer: Provides connectivity for network hosts and end devices

  • Hierarchical networks have advantages over flat network designs. The benefit of dividing a flat network into smaller, more manageable hierarchical blocks is that local traffic remains local. Only traffic destined for other networks is moved to a higher layer.

  • Where Modular Design of Enterprise Architectures may apply. Enterprise Architectures can be used to further divide the three-layer hierarchical design into modular areas. The modules represent areas that have different physical or logical connectivity. They designate where different functions occur in the network. This modularity enables flexibility in network design. It facilitates implementation and troubleshooting. Three areas of focus in modular network design we may need to examine are; Enterprise structure, Server farm structure and Enterprise Edge.

  • This area contains the network elements required for independent operation within a single or branch location. This is where the building access, building distribution, and structure core are located.

  • A component of the enterprise the data centre server farm protects the server resources and provides redundant, reliable high-speed connectivity.

  • As traffic comes into the network, this area filters traffic from the external resources and routes it into the enterprise network. It contains all the elements required for efficient and secure communication between the enterprise and remote locations, remote users, and the Internet.

  • The core layer design enables the efficient, high-speed transfer of data between one section of the network and another. The primary design goals at the core layer are to:

    • Provide 100% uptime

    • Maximize throughput

    • Facilitate network growth

  • For the more complex designs use of Core Layer Technologies may well become a consideration.

  • Most core layers in a network are wired in either a full-mesh or partial-mesh topology. A full-mesh Topology is one in which every device has a connection to every other device. Although full-mesh topologies provide the benefit of a fully redundant network, they can be difficult to wire and manage and are more costly. For larger installations, a modified partial-mesh topology is used. In a partial-mesh topology, each device is connected to at least two others, creating sufficient redundancy without the complexity of a full mesh.

    A comprehensive project plan follows that establishes key delivery points and time frames for go no-go elements critical to success with specific actions and accountabilities. Once agreed with the client, the plan is then implemented.

    Prior to full customer delivery, site acceptance test begins with acceptance documentation and go live dates agreed.

To learn more about this service, call us on 01869 320646 or Contact Us


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