What is NBN Business Ethernet?

NBN Business Ethernet (formerly Enterprise Ethernet) is a wholesale Layer 2 Ethernet service delivering:

  • Symmetric speeds from 10Mbps to 1Gbps
  • Dedicated, uncontended bandwidth
  • Service Level Agreements with financial remedies
  • 4-hour fault restoration SLA
  • Delivered over NBN's fibre infrastructure

Retail prices (charged by RSPs like Telstra, Optus, TPG) typically range from $600/month for 10Mbps to $3,000+/month for 100Mbps symmetric.

What SD-WAN Over Standard Broadband Delivers

SD-WAN over consumer/business NBN grades (NBN 250, NBN 1000) combined with 4G/5G achieves:

  • Total bandwidth often exceeding Business Ethernet at lower cost
  • Redundancy through path diversity — a single NBN fault doesn't cause downtime
  • Application-aware QoS ensuring critical apps perform regardless of congestion
  • Sub-second failover to cellular if fixed line fails

Cost Comparison

Scenario: 100Mbps Symmetric Requirement

Business Ethernet

  • 100Mbps symmetric Business Ethernet: $1,800-2,500/month
  • Installation: $2,000-5,000 one-time
  • Lead time: 60-90 business days

SD-WAN Alternative

  • NBN 1000/50 (Gigabit): $130/month
  • 5G Business SIM (200GB): $100/month
  • Peplink Balance 310X hardware: $1,200 one-time
  • SD-WAN licensing/management: $80/month
  • Total: $310/month ongoing + $1,200 one-time

Monthly saving: $1,490-2,190 — and you get more aggregate download bandwidth with greater resilience.

When Business Ethernet Still Makes Sense

  • Symmetric upload requirements: Video production, large file uploads — NBN 1000 upload is only 50Mbps
  • Hard SLA requirements: Regulatory or contractual obligations for a formal SLA
  • Low tolerance for variability: Financial trading, real-time control systems
  • Already on contract: Factor in break costs before switching

When SD-WAN Over Broadband Wins

  • Cost sensitivity: Savings of $1,000-2,000+/month per site add up fast
  • Multiple sites: Cost advantage multiplied across 10, 50, 100 locations
  • Cloud-first workloads: SaaS apps don't need dedicated circuits
  • Rapid deployment needed: SD-WAN live in days vs months
  • Resilience focus: Dual ISP + cellular beats single Business Ethernet for uptime

The Hybrid Approach

Some organisations use Business Ethernet for their primary data centre link while running SD-WAN at branch sites. This hybrid model captures the best of both worlds:

  • Dedicated circuit to head office/data centre for latency-sensitive core systems
  • SD-WAN at branches for cost efficiency and resilience
  • SpeedFusion tunnels from branches terminating at FusionHub or head-office appliance

Migration Considerations

  • Check Business Ethernet contract terms and exit clauses
  • Run SD-WAN in parallel during transition period
  • Validate all applications on SD-WAN before cutting over
  • NBN FTTP upgrades improving quality — worth reassessing NBN grade first

Affinity MSP: Independent Connectivity Advice

Affinity MSP provides vendor-neutral connectivity assessments:

  • Cost modelling: Detailed TCO analysis for your specific sites
  • Application assessment: Identify which apps need dedicated circuits
  • Migration planning: Risk-free transition from Business Ethernet
  • Ongoing management: Monitor and optimise post-migration

Conclusion

For most Australian businesses in 2026, SD-WAN over standard broadband and 4G/5G delivers superior resilience and dramatically lower cost than NBN Business Ethernet. The exceptions are niche: symmetric upload-intensive workloads and hard contractual SLA requirements. For everyone else, the numbers overwhelmingly favour SD-WAN.

Is Business Ethernet Costing You Too Much?

Get a free cost analysis and see how much you could save by switching to SD-WAN.

Get Your Free Cost Analysis