Australian Data Centre Interconnect Market: Set to Boom with AI Surge

The demand for DCI services in Australia is not uniform; it is driven by a complex interplay of emerging technologies, economic shifts, and national security mandates.

The Artificial Intelligence (AI) Catalyst

The global requirement for AI model training and inference is fundamentally altering the technical and connectivity requirements of the Australian data centre market. AI workloads involve massive, GPU-dense compute clusters that generate heat and require high data throughput.

In terms of connectivity, AI applications - especially those involving real-time inference, such as autonomous systems or live translation - require sub-5 millisecond latency, which can only be achieved through geographically distributed data centres linked by ultra-high-speed DCI. Furthermore, the move toward 400G and 800G optical technologies is being accelerated by the need to manage the massive "East-West" traffic generated between compute clusters during AI model training phases. CSIRO research indicates that 68% of Australian businesses have already implemented AI, with a further 23% planning to do so in the near term, ensuring a sustained pipeline of demand for AI-ready interconnectivity.

Cloud Proliferation and the "NeoCloud" Phenomenon

The ongoing shift toward digital transformation and cloud adoption remains a primary driver. This has given rise to "NeoCloud" operators - tenants who absorb massive blocks of 10 MW to 50 MW of data centre capacity at short notice. These operators rely on DCI to create a seamless pool of resources across multiple facilities, effectively treating dispersed locations as a single virtualised data centre.

Hyperscale operators, including Amazon Web Services (AWS), Microsoft, and Google, are investing billions in self-built and colocation facilities in Sydney and Melbourne. This concentration of capacity necessitates robust "backhaul" DCI to link these facilities to terrestrial fibre rings and subsea landing stations.

Subsea Cable Connectivity and Regional Resilience

Subsea cables represent the "silent backbone" of Australia's status as a digital hub. They carry 99% of all international traffic, making them essential for global connectivity. Australia's strategic geographic location allows it to serve as a secure gateway to Asian and North American markets while bypassing contested regions like the South China Sea.

The proliferation of subsea cables landing in Perth, Sydney, and Brisbane drives a secondary demand for terrestrial DCI. Once data reaches an Australian landing station, it must be transported via dark fibre or high-capacity wavelength services to the metropolitan data centre hubs where the processing occurs. Hyperscalers are increasingly owning and operating these subsea systems, integrating their international and domestic connectivity strategies to ensure end-to-end performance and cost control.

Data Sovereignty and Regulatory Mandates

Australia's regulatory environment is increasingly influential in shaping DCI demand. The Security of Critical Infrastructure (SOCI) Act and the Australian Cyber Security Strategy 2023–2030 have imposed stringent security and data localisation requirements on critical sectors. These mandates compel government agencies and private infrastructure operators to store data within Australian borders, often requiring redundant copies across geographically separate data centres to ensure business continuity in the event of a regional disaster.

The Australian Government’s Hosting Certification Framework (HCF) has created a protected perimeter around sensitive workloads, driving investment in high-security facilities that offer dedicated, private DCI links to ensure that traffic never touches the public internet.

The demand for DCI services in Australia is segmented by geographical reach, with each tier - Metropolitan, Intercity, and International - serving distinct technical and business objectives.

Metropolitan DCI (Intra-City)

Metro DCI links data centres within the same capital city (e.g., Sydney’s "Digital Corridor").

• Ultra-Low Latency: Applications such as edge computing, high-frequency trading, and real-time AI inference require very low latency, achievable only through local metro fibre.

• Distributed Campus Architecture: Hyperscalers and large enterprises use metro DCI to treat geographically separate facilities as a single virtualised data centre, enabling seamless workload mobility and "East-West" traffic flow between clusters across campuses.

• Hybrid Cloud Access: Secure, direct on-ramps to cloud providers (AWS, Azure, Google) typically terminate at local metro hubs to minimise ingress/egress delay.

Capacity Requirements: High density is the standard. Metro DWDM links are the first to adopt 400G and 800G technologies to handle massive data bursts from GPU-dense AI clusters.

Intercity DCI (Inter-Capital/National)

Intercity DCI connects major economic hubs, such as the inter-capital routes between Sydney, Melbourne, Brisbane, Adelaide, and Perth.

• Geo-Redundancy & Disaster Recovery: Organisations use intercity links to maintain synchronised data copies in separate tectonic or power grid regions to ensure business continuity during regional disasters.

• Power & Grid Optimisation: As power becomes scarce in Sydney and Melbourne, operators are distributing workloads to other cities and regions, necessitating robust "long-haul" connectivity back to primary nodes.

Capacity Requirements: National backbones prioritise aggregate throughput and resilience. While latency is higher due to distance, these routes leverage single-mode fibre (G.652) to push capacity past 800G per strand using coherent optics.

International DCI (Subsea)

International DCI provides the essential transoceanic links connecting Australia to Asian, North American, and European markets.

• Strategic Gateway Status: Australia serves as a secure digital hub for the Indo-Pacific, attracting investment by offering routes that bypass chokepoints like the South China Sea.

• Hyperscale Global Fabric: Global cloud providers now act as "architects" of their own subsea infrastructure to ensure high-capacity, dedicated links between international availability zones.

Capacity Requirements: These links offer the highest raw capacity (e.g., the SMAP cable provides 400 Terabits per second), but are physically constrained by higher latencies (e.g., 60-160ms+ depending on the destination).

The Australian DCI supplier ecosystem is a mix of established telecommunications incumbents, specialised data centre operators, and innovative software-defined platforms.

Infrastructure and Telecommunications Giants

These entities own the extensive fibre assets and subsea systems that form the physical backbone of the DCI market.

Telstra (including Telstra InfraCo): Telstra is the undisputed leader in Australian infrastructure, managing over 250,000 km of domestic fibre and 400,000 km of subsea cables. Its dedicated Data Centre Interconnect product links leading facilities in Sydney, Melbourne, Perth, Adelaide, Brisbane, and Canberra.

• Service Highlights: Telstra offers managed DCI with 1 Gbps and 10 Gbps ports, provisioned through a dynamic self-service portal. A unique "capacity reservation" feature allows customers to secure bandwidth on any DCI route for up to six months for a minimal fee.

• Strategic Advantage: Telstra InfraCo’s carrier-neutral approach provides open access to fibre operators and carriers across its own seven primary data centre sites, which are engineered to support AI-ready high-density power and cooling.

Vocus Group: Vocus has emerged as Australia’s second-largest fixed-line infrastructure provider, following its 5.25 billion AUD acquisition of TPG Telecom’s fixed and fibre assets in 2025. This acquisition increased its national backhaul capacity by roughly 30–40%.

• Service Highlights: Vocus focuses on pure-play fibre infrastructure, monetising dark fibre, wavelength services, and managed connectivity for government and enterprise clients. Their network connects over 150 data centre locations nationwide.

• Strategic Advantage: Their "Project Horizon" is a 400 million AUD investment aimed at enhancing connectivity to regional hubs and the mining sector in Western Australia.

TPG Telecom (including AAPT and Vision Network): Historically a major force in the market, TPG’s fibre assets have recently transitioned to Vocus.

• Service Highlights: TPG/AAPT was known for its "Business IP-Line," providing dedicated internet and logical links with speeds up to 10 Gbps. Its data centres, such as those in Melbourne (530 Collins St) and Sydney (Forest Lodge), continue to serve as major network hubs.

Superloop: Superloop operates high-performance metro fibre networks in Australia’s major capital cities.

• Service Highlights: Their "Probiz" enterprise Ethernet service offers symmetrical speeds up to 2 Gbps with an enhanced service level target (4-hour fault restoration) and 99.95% network availability.

• Strategic Advantage: Superloop’s network is securely connected to 12 major data centres in Melbourne and has three distinct campuses in Sydney (North Ryde, Alexandria, and CBD) linked by a core network ring.

Specialised Data Centre and Colocation Operators

These suppliers provide "on-net" DCI services that allow customers within their facilities to connect to each other and to external cloud ecosystems.

NextDC: As Australia's leading locally owned data centre provider, NextDC operates a national footprint of Tier III and Tier IV facilities.

• Service Highlights: "Metro Connect" provides Layer 2 point-to-point connectivity within metropolitan areas, while the "AXON" virtual fabric offers elastic on-ramps of up to 100Gbps to global cloud providers.

• Strategic Advantage: NextDC is highly certified, with the first Tier IV facility in Brisbane (B2), and is aggressively expanding its capacity in Sydney (S3, S4) and Melbourne (M2, M3) to support AI and high-density compute.

Macquarie Data Centres: Part of the Macquarie Technology Group, this provider specialises in secure, sovereign infrastructure for the federal government and hyperscale clients.

• Service Highlights: Provides Layer 2 Ethernet DCI (up to 10 Gbps) and Layer 3 IP Data Centre Cross Connects (DCCC) between its Intellicentres.

• Strategic Advantage: Its facilities, such as the Macquarie Park campus in Sydney, are purpose-built to meet rigorous government security standards (PSPF Zone 2-4) and offer direct connectivity to high-security networks like AARNET and ICON.

Equinix: A global giant, Equinix operates some of the most significant interconnection hubs in Australia, including the SY series in Sydney.

• Service Highlights: The "Equinix Fabric" is a globally recognised software-defined interconnection service that enables businesses to connect their own distributed infrastructure and that of any other company on the platform.

• Strategic Advantage: Equinix is a critical nexus for subsea cables and acts as a regional reseller for major cloud providers, providing deep ecosystem density.

Disruptive SDI and NaaS Platforms

These platforms provide an overlay of connectivity that can span multiple physical fibre networks.

Megaport: An Australian success story, Megaport’s SDN platform allows customers to access elastic interconnection services across 1,000+ locations.

• Service Highlights: Offers virtual cross-connects (VXCs), Cloud Routers (MCR), and Virtual Edges (MVE), all manageable via an API or portal.

• Strategic Advantage: Their recent integration with Latitude.sh allows customers to spin up dedicated compute resources alongside private connectivity, creating an AI-ready "on-demand" infrastructure stack.

Console Connect (by PCCW Global): Console Connect provides automated Layer 2 and Layer 3 network connections across its own high-performance global network.

• Service Highlights: "CloudRouter" dynamically routes traffic between different cloud platforms, while their NaaS platform reaches over 200 locations in the Asia-Pacific region alone.

• Strategic Advantage: They have a strong presence in Sydney, Perth, and Brisbane, including a recent Point of Presence (PoP) at the Macquarie Data Centres campus in Sydney.

The Australian DCI market is a high-growth segment that is inextricably linked to the broader capital expenditure occurring in the data centre sector.

The industry analyst consensus is that the DCI market in Australia maintained a healthy growth rate during the late 2010s and early 2020s in the single digits. The pandemic acted as a major accelerant, with data traffic between regional data centres increasing, according to some operators. This demonstrated the critical need for redundant, SDI-controlled networks to manage fluctuating and unpredictable workloads.

Unfortunately, the DCI market is opaque, and operators do not publish segmented data. Typical analyst forecasts are dominated by hardware revenues, and it is difficult to separate the DCI service revenues contestable by telecoms operators. The analyst consensus is that the total DCI market is around $600 million, which is plausible if all DCI-related spending (including hardware) is taken into account. NextDC alone quotes A$30m in FY25 just for interconnect revenue, which would include service and some software, and we estimate they hold around 14% of deployed DC capacity in the Australian market. Crudely multiplying up, that would size the total DCI service/software segment at something over $A200 million per annum. The service share would be under this number.

We estimate that DC leasing revenue is growing at 20.5% CAGR from 2025 to 2030. However, we expect DCI revenue growth to be lower as technological advances and growing scale eat into capacity prices. A growth rate of around 12-13% per annum can be taken as a first order estimate for the growth of DCI service revenue in Australia.

The Broader Data Centre Context

To understand the DCI market's direction, one must consider the primary industry it serves. Venture Insights estimates that total deployed data centre capacity in Australia (including internal hyperscale capacity) will grow from 1,428MW in FY25 to 3,176MW in FY30, representing a Compound Annual Growth Rate (CAGR) of 16.5%. We further estimate that leasing revenues (excluding ancillary services such as interconnection, hardware, software and solutions)will rise at 20.5% CAGR across the forecast period to reach A$8.4 billion.

The hyperscale segment is the primary engine of this growth. Venture Insights estimates that the total deployed hyperscale data centre capacity in Australia will rise at a CAGR of 20.7% from 961MW in FY25 to 2,458MW in FY30. This suggests that the underlying demand from massive data centre developments will provide a significant tailwind for DCI service growth.

In response, the Australian DCI sector has transitioned from a steady growth phase to an accelerated "boom" phase, fueled by the structural shift toward cloud-native and AI-ready infrastructure. The projected acceleration in growth from historical mid-single digits to future double digits can be attributed to several specific mechanisms:

• The AI Rack Density Shift: Standard racks are moving from 5-10 kW to 50 kW+, requiring completely new DCI topologies to handle the intra-campus throughput.

• Hyperscale Build Race: We expect total investment in Australian data centre pipelines is expected to exceed A$20 billion in the next five years, creating a massive new physical base for DCI services.

• Grid Scarcity and Regionalisation: As power becomes scarce in Sydney and Melbourne, operators are being forced to build in regional hubs or secondary cities like Perth, Brisbane, and Newcastle increasing the "long-haul" DCI requirements to link these facilities back to the primary metropolitan nodes.

Future DCI growth rates are projected to be significantly higher than historic averages, reflecting the increased "criticality" of interconnection in the AI era. This is also reflected in growth rates in related markets like DCI software and dark fibre.

The Australian DCI market is highly concentrated, but geographic diversification is beginning to occur as power constraints and subsea landing strategies evolve.

Sydney: The Primary Innovation Hub

Sydney remains the epicentre of the Australian digital hub, accounting for the vast majority of investment and capacity.

• Infrastructure Density: Sydney stands out due to its advanced telecommunications infrastructure and high concentration of tech companies. Cushman & Wakefield has estimated that Sydney has a development pipeline of 986 MW and another 2.4 GW in the land bank stage.

• Hyperscale Activity: Major land acquisitions in 2024 by hyperscalers confirm Sydney’s role as the primary landing point for international data and the first point of entry for new AI-ready GPU clusters.

Melbourne: The Southern Contender

Melbourne is the second-largest market, benefiting from a diverse economy and a growing tech ecosystem.

• Recent Momentum: While currently about half the size of Sydney in terms of deployed capacity (27% vs 58% of national capacity in 2025), Melbourne is gaining momentum as operators prioritise "deliverable power".

• Strategic Interconnects: Co-location facilities like the Melbourne Data Centre at 530 Collins St (operated by 5G Networks) serve as critical CBD hubs for financial services and network providers.

Brisbane, Perth, and Regional Expansion

• Brisbane: Emerging as a key player due to its lower operational costs, and new subsea cable landings that bypass traditional routes.

• Perth: Serves as the primary western gateway for subsea cables from Asia and Europe, driving significant demand for DCI to link landing stations to local facilities like NextDC P1 and Equinix PE2.

• Canberra: Remains a specialised hub for government and defense, where demand is driven by high-security certification and data sovereignty requirements rather than raw volume. Declining in its share of national deployed capacity.

As the market matures, the technological requirements for DCI are shifting toward higher speeds and greater efficiency to combat rising energy costs and complex management requirements.

The Shift to 400G and 800G

Enterprises and hyperscalers are actively upgrading their DCI infrastructure to support 400G and 800G optical transceivers. These technologies provide several critical benefits:

• Massive Bandwidth Upgrades: Essential for handling the "East-West" traffic generated by federated AI and machine learning workloads.

• Lower Cost-per-Bit: High-speed technologies improve the economics of data transmission over long distances.

• Energy Efficiency: Next-generation transceivers are designed to reduce the power consumption per gigabit, a vital factor as energy costs in Australia account for up to 40% of total data centre operational expenses.

Automation and AIOps in DCI

Managing dynamic traffic flows in multi-cloud environments is becoming increasingly complex. This is driving a shift toward AIOps and intelligent DCI.

• Predictive Management: AI is being integrated into DCI platforms to enable predictive traffic management, automated fault detection, and dynamic bandwidth allocation.

• Intent-Based Networking: Major vendors like Ciena, Cisco, and Nokia are providing "active" coherent optical offerings that use telemetry and real-time analytics to match network capabilities with mission-critical SLAs.

Scope for disruption

As long as the current DCI market is based on fibre availability, ownership of an extensive fibre network and rollout capabilities is a competitive moat. However, it is worthwhile considering what might disrupt such a moat.

Fibre ducts are already available in many metro locations, though they are fairly tightly held and lightly regulated. Ducting is an adjacent market that telecommunications operators have little incentive to disrupt.

However, neocloud operators have different incentives, and deep pockets. It is plausible to envision future investment by neocloud operators in duct networks as they seek to improve connectivity economics and speed of deployment. Alternatively, private equity may intervene. Telecom operators should not assume that the current market structure is sacrosanct, and should be prepared to preempt such moves by opening duct networks to capture duct revenues from neocloud fibre rollout if that eventuates.