From Copper to Fibre: How to Design Your LAN/WAN for NBI Rollout Areas

IT man with bunch of cables in hands in server room

A Turning Point for Rural Irish SMEs

Across rural Ireland, the National Broadband Plan (NBI) is transforming connectivity. As fibre rolls out to towns, villages, and business parks, SMEs that once struggled with DSL speeds now face new opportunities — and new challenges.

Upgrading from copper-based services to fibre isn’t just about faster internet. To unlock real value, small and medium enterprises need to redesign their internal LAN/WAN so the business is ready for VoIP, cloud applications, and hybrid work. Without preparation, fibre can be underutilised, or worse, create bottlenecks inside the office network.

This article provides a vendor-neutral roadmap for Irish SMEs on how to prepare their LAN/WAN as fibre arrives.

1. The NBI Rollout: What SMEs Can Expect

  • Coverage: Over 540,000 premises targeted, with rural SMEs among the main beneficiaries.
  • Speed tiers: Fibre brings symmetric speeds up to 1 Gbps, replacing uneven DSL or copper services.
  • Timeline: Ongoing through 2026, with rollout maps updated regularly by NBI.
  • Implication: SMEs must align IT infrastructure to leverage the investment.

2. Common Pitfalls When Migrating to Fibre

  • Old routers/firewalls that can’t handle gigabit throughput.
  • Flat networks with no segmentation, creating security risks.
  • Legacy phone systems incompatible with VoIP.
  • Single point of failure (no backup links or resilience).

Without addressing these, businesses may see no real productivity gains despite faster internet.

3. LAN/WAN Design Principles for SMEs

a. Upgrade Edge Equipment

  • Choose routers and firewalls rated for gigabit speeds.
  • Support modern VPNs and secure remote access.

b. Implement SD-WAN (Scaled for SMEs)

  • Combine NBI fibre with LTE/5G as a failover.
  • Route critical traffic (e.g., VoIP, Teams/Zoom) with priority.

c. Segment the Network

  • Separate guest Wi-Fi, staff devices, and critical business systems.
  • Use VLANs to contain threats and improve performance.

d. Prepare for VoIP and Unified Comms

  • Replace legacy PBXs with VoIP-ready systems.
  • Test call quality with QoS (Quality of Service) enabled.

e. Enable Cloud and Remote Work

  • Direct-to-cloud connectivity for Microsoft 365, ERP, or HR platforms.
  • Secure VPNs for hybrid staff working remotely.

4. Business Outcomes of Fibre-Ready Networks

  • Resilience: Reduced downtime with fibre + 5G backup.
  • Efficiency: Faster cloud adoption for finance, HR, and CRM.
  • Collaboration: Seamless hybrid meetings with video-first culture.
  • Growth: Scalable infrastructure for expansion or new sites.

5. Checklist for SMEs Before Fibre Goes Live

  1. Audit routers, firewalls, and switches for gigabit capacity.
  2. Map business applications and traffic priorities.
  3. Plan network segmentation for guest/staff/IoT.
  4. Budget for VoIP migration and endpoint upgrades.
  5. Arrange SD-WAN or dual-WAN setup for resilience.
  6. Train staff on new tools and security awareness.

Case Example

A small engineering firm in rural Galway upgraded to NBI fibre but initially saw little improvement due to an outdated firewall. After redesigning their LAN with VLANs, replacing routers, and adding LTE failover, the business cut downtime by 90% and successfully migrated payroll, CRM, and CAD applications to the cloud.

Conclusion: Don’t Just Plug In, Plan Ahead

Fibre rollout is a once-in-a-generation upgrade for rural Irish businesses. But plugging fibre into outdated infrastructure only shifts bottlenecks inside the office. SMEs that redesign their LAN/WAN will maximise the benefits of the NBI rollout — gaining speed, resilience, and security in one move.

Microtel supports SMEs across Ireland with LAN/WAN readiness assessments, ensuring your business makes the most of fibre from day one.

References

Department of the Environment, Climate and Communications. (2024). National Broadband Plan: Progress update. Government of Ireland. https://www.gov.ie/en/publication/national-broadband-plan/

Koziolek, H., Goldschmidt, T., & Doppelhamer, J. (2019). Future enterprise networks: A research agenda for SD-WAN. Journal of Network and Systems Management, 27(3), 616–639. https://doi.org/10.1007/s10922-019-09505-9

NIST. (2023). Zero trust architecture (SP 800-207). National Institute of Standards and Technology. https://doi.org/10.6028/NIST.SP.800-207

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