Why network resilience is becoming a core enterprise IT requirement

By Ram Sellaratnam, Group CEO & MD, iBUS Network and Infrastructure

Over the years,  we have seen enterprise digital connectivity move from being treated largely as a utility to becoming part of the operating fabric of a business. Earlier, a network primarily needed to keep employees connected to email, internal systems and the internet. Today, mobility solutions involve a lot more.

ERP systems, point-of-sale platforms, cloud applications, AI tools, security systems and connected devices all rely on the network working when they are needed. In many businesses, even a short disruption can affect multiple functions at once.

This has changed what enterprises should expect from their networks. Availability remains important, but it is no longer enough. The more important question is what happens when availability is lost.

Availability is not the same as resilience

A network can be available under normal conditions and still be unprepared for a major disruption.

Resilience is about what happens when a fibre link is cut, equipment fails, power is interrupted or a critical service becomes unavailable. Can traffic move through another route? Can essential systems continue operating? How quickly can services be restored?

These questions need to be considered before an incident occurs.

Redundant links and alternative network paths can reduce the dependence on a single connection. Automated re-routing can allow traffic to move through an available route when the primary path fails. Disaster recovery arrangements can help the organisations restore critical services when the disruption is more extensive.

When these elements are planned properly, recovery can happen with minimal disruption to users. The best outcome is often one where an employee, customer or visitor barely notices that something has gone wrong.

Design for failure, not perfection

In my experience, the simplest and most useful question an IT team can ask when designing infrastructure is, “What if it goes wrong?”

What happens if the primary connection fails during a critical business process? What if a network component stops working? What if a cyber incident affects part of the environment? Which services need to remain available, and how quickly can the others be restored?

These questions change the way infrastructure is planned.

The objective is not to assume that a network will fail. It is to recognise that failures will happen at some point and make sure the organisation is prepared for them.

This also means testing recovery arrangements rather than assuming that a backup will work simply because it exists. A secondary link that has never been tested, or a recovery plan that has never been exercised, may not provide much comfort during an actual incident.

Resilience is built through preparation, not just through additional equipment.

Network and cyber resilience are coming together

There is another reason this conversation has become more important. Network resilience and cyber resilience can no longer be treated as completely separate areas.

A network can be disrupted by a physical failure, but it can also be affected by a cyber incident. If an organisation’s systems are compromised, the ability to isolate affected areas, maintain essential services and restore operations becomes part of both the security and network response.

This requires IT and security teams to understand how systems depend on one another.

Network visibility becomes particularly important here. Teams need to know what is connected, how traffic is moving and where unusual activity or a potential weakness may be developing. Regular monitoring can help identify issues before they become larger operational problems.

The aim is not simply to prevent an incident. It is to limit its impact and restore normal operations as quickly as possible.

The physical network still matters

Much of the enterprise tech conversation is now about cloud platforms, AI and software. But in the end all these services rely on physical connectivity.

With increased data consumption and more connected devices being added by organisations, the underlying network needs to provide sufficient capacity and coverage to support them.

Fibre connectivity solutions can provide the high capacity backbone to cope with growing data volumes. But the connectivity doesn’t stop when the fibre meets a building.

Users need reliable connectivity wherever they actually work and live in offices, hospitals, airports, hotels and residential communities. Distributed Antenna System (DAS) companies and other in-building solution players can help extend mobile coverage across large or complex environments.

The requirements are different for every building. A hospital may need connectivity for critical systems and staff, while a residential development may have thousands of residents using networks for work, education, entertainment and communication. The infrastructure therefore needs to be designed around the environment and its users rather than treated as a standard installation.

Designing for growth, without sacrificing reliability

Enterprise networks are getting less predictable, too. Organisations add new applications, connect more devices, move to new locations, and embrace technologies that may not have been on their radar a few years ago.

“Scalability” is relevant, but capacity alone doesn’t answer the question of resilience.

The network should scale without introducing new points of failure. Capacity planning, redundancy, monitoring and regular maintenance must be integrated so that increased demand doesn’t impact reliability. This is especially important in large commercial and residential settings where a change in usage may affect thousands of connected users.

The measure of a resilient network

The enterprise network of the future will not be judged only by how fast it is or how often it is available. It will also be judged by how it responds when something unexpected happens.

For IT leaders, that means asking different questions during the planning process. Where are the points of failure? What happens if one of them fails? How quickly can traffic be redirected? Which services need to continue without interruption? How well do network and security teams work together during an incident?

These aren’t questions to be answered in the wake of an outage. As the businesses become more reliant on the digital infrastructure, resilience needs to be built into the network from the start. The goal is not to create a system that assumes everything will go perfectly.
If something doesn’t, this is to build one that keeps serving the business.