Network Design Phases and Their Role in the Network Lifecycle

by Craig Kieswetter

The world of IT infrastructure has evolved exponentially in the past decade, from legacy systems to innovative cloud services. Today’s business resources are connected by a wide range of user-provided and managed devices – from on-demand workers to employees juggling multiple responsibilities. Unlike the old ways of managing communications, which relied on physical networks and assumed trust, today’s network architecture needs to be simple, adaptive, and scalable.

Core, distribution, and access layer design

There are several different ways to implement a network design. A core is the heart of the network and connects all the other layers. Distribution layer devices route traffic to and from each other. They also contain redundant connectivity toward the core. Distribution layer switches should also be able to handle 10G ethernet and EIGRP. Distribution layer switches should always connect to the core through routed ports. In addition, distribution layer switches should have dynamic routing.

Access layer switches are connected to each other via a layer-2 link. This minimizes physical loops and ensures redundancy and reliability. When a spanning tree is used, the access layer switches are not connected to each other. The distribution layer switches are linked to each other via a layer-3 link. The inverted-U topology avoids the need for a spanning tree or other routing protocol.

Adaptive design

Adaptive network design (ADN) is a process for evolving infrastructure to meet the changing needs of the user. This technique involves the relay of information from network elements such as switches, routers, and instrumentation to the software layer, where it can be analyzed and acted upon. This process is particularly useful for a mobile network that enables users to make mobile withdrawals from ATMs. However, this method may not be suitable for every type of network.

Unlike other techniques, Adaptive network design is an effective way to handle complex eddy dynamics. Multiple gliders can be used to track the target eddy. The proposed method uses uniform sampling inside the eddy, while traditional techniques sample the eddy along a fixed path. Moreover, this algorithm considers the influence of the ocean current on glider motion and calculates the eddy’s direction and velocity in real-time. The resulting heading angle is then adjusted accordingly. The proposed approach is effective in tracking the target eddy and has been validated by an SCS field experiment.


The key to network redundancy is analysis. Every network is unique in some way, so you need to consider common items and alternative solutions, such as mainframe access. Analyzing your network design for redundancy can help you make better decisions about the design of your network. Here are some things to consider:

When designing a network, redundancy means providing multiple paths between nodes. Routers are needed to connect subnets within the network and to external destinations. Adding more switches will increase complexity. Using spanning trees or link aggregation may be used to create multiple paths. These options can provide additional functionality, but they should be chosen carefully. In addition to the benefits of redundancy, they also make your network design more efficient.

Optimize phase

The Optimize phase of a network design involves monitoring the performance and troubleshooting network issues. This phase is heavily intertwined with company policies and procedures. Proactive management, such as detecting problems before they occur, is crucial to network optimization. If you can prevent issues before they happen, you can improve your network performance and decrease costs. Here’s a breakdown of the various phases of network design. This is an overview of the different phases and their role in the network design lifecycle.

The Plan and Optimize phases are both critical to the success of a network design. During the Plan phase, network requirements are identified. Then, the network designer creates a logical design based on those requirements. After this, the network is constructed and tested. This is the ultimate test of the design. In this phase, the network is monitored for performance problems and faults to determine whether it meets the requirements. If any problems or errors are found, the Optimize phase of network design may be necessary.


Before purchasing a large-scale network, most organizations develop a request for proposal (RFP). This document specifies the equipment, software, and services that they want and asks vendors to quote the most competitive prices. Some RFPs are very specific, specifying mandatory and important items, while others provide only a broad description of what they want. Some organizations use RFPs to ask vendors for their opinions on network design and options.

Most organizations need to have a robust network for mission-critical applications. Point-of-sale data and order processing applications are two examples of mission-critical applications. These systems must move from retail stores to corporate offices. If a network fails or becomes unreliable, the organization will lose revenue. And this is where the cost of network design comes in. A well-planned and implemented network can reduce the cost of the organization.


Among the different certifications in network design, Cisco Certified Design Associate (CCDA) is the highest paying. Designed for network engineers, system engineers, and sales engineers, this certification validates basic design skills for the Cisco network. This credential has an average salary of $89,000 per year and gives candidates the credentials necessary to work in various networks. This credential will help them gain valuable experience as network designers and engineers. These professionals can work in different industries and hold various titles, including network engineer, frameworks engineer, and network architect.

Although most network designers have basic knowledge of common networking services and applications, they lack advanced knowledge. Cisco Certified Design Associate certifications will help network designers build complex customer networks. These certifications also impart knowledge in network design principles. Aside from improving job prospects, they will also provide new job opportunities. In our next article, we cab discuss pbx phone system.

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