UniFi Enterprise Networking 2026: 100G Core, 25G Aggregation and Stackable Campus Switches Explained

Quick answer: ECS-Core is the 32-port 100G backbone switch. ECS-Aggregation connects 48 × 25G links to six 100G interfaces. The ECS-24S and ECS-48S families provide 24-port or 48-port multi-gigabit access, with PoE and non-PoE options. Their four front 25G ports are uplinks; their two rear 100G ports are dedicated to stacking.

That distinction matters when choosing a UniFi enterprise switch. A larger office, campus or storage-heavy environment may benefit from a resilient 25G/100G backbone. A small office with mostly cloud applications may be better served by a simpler design. Start with traffic, endpoint speeds and the required failure tolerance.

Ubiquiti announced its next-generation enterprise networking platform on 03-Sep-26. This guide explains how core, aggregation and access fit together, compares all four S models, and identifies the deployment checks that matter before buying. Hardware figures and current stacking requirements were checked against the linked official documentation on 26-Oct-26.

Highlights

• ECS-Core provides 32 × 100G/40G QSFP28 ports with 3.2 Tbps non-blocking throughput and MC-LAG for high-capacity campus core designs.
• ECS-Aggregation remains the high-density 25G aggregation layer, with 48 × 25G SFP28 ports and 6 × 100G QSFP28 ports.
• The new ECS-24S and ECS-48S families add dedicated 100G stacking interfaces to the access layer.
• Each stackable access model is available in PoE and non-PoE form, which matters because many enterprise networks need both powered edge devices and high-speed wired endpoints.
• The newer S models are not automatically faster replacements for every existing ECS-PoE switch. Their main architectural advantage is stacking and a different port mix.
• Ubiquiti’s 2026 software story is increasingly about operations as well as hardware, including Digital Twin, Time Machine, Optics Health and SafeOps.
• 100G is valuable when the traffic pattern justifies it. It should not be treated as a default requirement for every business network.

What Actually Changed in UniFi Enterprise Networking in 2026?

Enterprise networking is usually described in three layers: core, aggregation or distribution, and access. The access layer connects users, WiFi access points, cameras, phones and other endpoints. Aggregation collects those access switches. The core carries large volumes of traffic between major parts of the network.

UniFi already had powerful enterprise access and aggregation products, but the September 2026 announcement makes the architecture more complete. The Ubiquiti ECS-Core establishes a dedicated 100G core platform, while the new S-series access switches add dedicated 100G stacking hardware alongside 25G uplinks. Ubiquiti also says the Enterprise Campus Aggregation platform receives an improved MC-LAG implementation and faster convergence behaviour.

The result is a more deliberate hierarchy: 100G at the core, 25G or 100G through aggregation, and 2.5GbE/10GbE at the access edge. That is much closer to the way larger enterprise networks are normally planned than simply buying progressively bigger standalone switches.

UniFi Enterprise Architecture at a Glance

This is not the only valid UniFi topology. Smaller networks can connect access switches directly to aggregation or gateway infrastructure without deploying a separate 100G core. The correct design depends on traffic, redundancy requirements, building layout and future growth.

ECS-Core: When a 100G Core Actually Makes Sense

The Ubiquiti ECS-Core is the headline product in the 2026 enterprise release. It provides 32 QSFP28 interfaces supporting 100G and 40G links, 3.2 Tbps of non-blocking throughput, 6.4 Tbps switching capacity and MC-LAG.

Those numbers sound impressive, but the more useful question is: what problem does a 100G core solve?

A core switch is valuable when many fast links are converging in one place. Imagine several access or aggregation switches each carrying 10G or 25G uplinks, multiple server and storage networks, high-density WiFi, surveillance traffic and large east-west data flows. A core with substantial headroom prevents the backbone from becoming the bottleneck as traffic from many edge switches converges.

For a small office with a few access points and mostly cloud applications, 100G is usually unnecessary. For a campus or data-heavy environment with multiple 25G paths, the calculation changes quickly.

ECS-Aggregation: The Bridge Between Core and Access

The Ubiquiti ECS-Aggregation remains an important part of the architecture rather than becoming obsolete because ECS-Core exists.

With 48 × 25G SFP28 and 6 × 100G QSFP28 ports, the aggregation switch is designed to collect many high-speed links from access switches and provide larger uplinks towards the core. In a larger building, one or more aggregation switches can therefore sit between the access layer and ECS-Core.

This also explains why ECS-Core does not simply replace ECS-Aggregation. They solve different problems. ECS-Core is optimised around dense 100G backbone connectivity. ECS-Aggregation provides the high-density 25G fan-out that is often needed between core and access.

ECS-24S vs ECS-48S: PoE and Non-PoE Models Compared

The four S models share the same core access-layer idea: multi-gigabit copper ports, four 25G uplinks and dedicated 100G stacking. Choose port density and PoE independently. Access points and cameras may need switch-supplied power; workstations, NAS systems and servers usually have their own power supplies.

The S family therefore makes more sense when viewed as four related access-layer choices rather than two PoE switches.

Product images: Ubiquiti. Front views shown for model identification.

Why the Non-PoE ECS-24S and ECS-48S Matter

Choose non-PoE when the connected equipment has its own power supply and the switch only needs to carry data. Choose PoE when the switch must also power access points, cameras, phones or other compatible devices. Neither choice is automatically better for every rack.

The ECS-24S and ECS-48S retain the port mix, 25G uplinks and stacking architecture of their corresponding PoE models. Compare the quoted hardware, power-supply configuration and expected load before drawing conclusions about purchase cost, heat or operating efficiency.

Typical non-PoE use cases include high-speed workstations, storage systems, servers, encoding equipment, security appliances and other networked devices with independent power. A mixed access design can therefore be perfectly logical: PoE switches for APs and cameras, non-PoE switches for wired compute and storage.

Are the New ECS-24S and ECS-48S Simply Faster Replacements?

No, and this is one of the most important details in the new product family.

The S-series access switches are newer, but “newer” does not automatically mean higher raw forwarding capacity in every configuration. Their bigger architectural change is the addition of dedicated 100G stacking interfaces, along with changes to uplink count and edge-port mix.

The 24-port comparison is straightforward: ECS-24S-PoE keeps the same 8 × 2.5GbE plus 16 × 10GbE access mix and the same 230 Gbps non-blocking throughput, but doubles the 25G uplink count from two to four and adds dedicated 100G stacking interfaces.

The 48-port comparison is even more interesting. The existing ECS-48-PoE has more 10GbE access ports and higher raw non-blocking throughput. The new ECS-48S-PoE shifts the mix towards more 2.5GbE ports and adds the 100G stacking architecture. For a high-density WiFi edge, that may be exactly the right trade-off. For a rack where many endpoints genuinely require 10GbE, the existing ECS-48-PoE can still be highly relevant.

The correct buying question is therefore not “Which model is newest?” It is “Which port mix, stacking design and PoE requirement matches the network?”

What 100G Switch Stacking Changes

The S models use four front 25G SFP28 ports for uplinks and two rear 100G QSFP28 ports for stacking. A 100G stacking interface is not an ordinary 100G uplink to ECS-Aggregation or ECS-Core.

Stacking presents several switches as one managed device and supports links aggregated across stack members. Current Ubiquiti stacking guidance specifies:

• Up to four switches, all with the same access-port count.
• A closed ring of compatible QSFP stacking cables.
• Factory-default switches when joining a stack.

The help guide requires UniFi Network 10.6 or later; the current S-model specifications state 10.6.101 or later. Validate the exact firmware and topology before migration, especially cross-stack LAGs and failover paths.

MC-LAG Explained Without the Marketing

MC-LAG, or Multi-Chassis Link Aggregation Group, allows a downstream device or switch to form aggregated links across two separate upstream chassis rather than relying on a single physical switch.

The practical goal is resilience. If one chassis or link becomes unavailable, the network can retain another path, provided the complete design is built and configured correctly. That is valuable at the aggregation and core layers where a single failure can affect many users.

Ubiquiti’s September 2026 announcement says it rebuilt the Enterprise Aggregation MC-LAG engine and improved convergence behaviour under load. The ECS-Core also supports MC-LAG, giving network designers a path to use resilient pairs at higher layers of the topology.

MC-LAG is not magic redundancy by itself. Power feeds, fibre routes, optics, upstream links and switch configuration all matter. Two switches connected to the same single power failure point or the same damaged fibre route are still one failure domain.

MACsec, Digital Twin, Time Machine, Optics Health and SafeOps

Operational visibility matters as much as port speed. Separate a vendor-announced capability from the behaviour supported by the chosen model and deployed release.

Hardware-Supported MACsec

Ubiquiti's enterprise announcement highlights hardware support for MACsec, which protects Ethernet traffic between compatible peers. Hardware support alone does not establish that every model, port and software release exposes the required configuration. Confirm both ends of an encrypted link before specifying it.

Digital Twin

Ubiquiti describes Digital Twin as a view of rack infrastructure and device interconnections. It helps administrators understand topology and affected paths. It should not be presented as proof that an arbitrary configuration has been simulated or validated before deployment.

Time Machine

Time Machine for switches provides historical port-state and event visibility. That can help connect an intermittent fault with a link or configuration change. It is not a substitute for packet capture or application monitoring.

Optics Health and SafeOps

The enterprise announcement also describes optical-link monitoring and safer network operations. Check which diagnostics, protection and recovery functions are available on the intended devices and release. These are vendor-described capabilities, not results of our own performance testing.

Sources: Ubiquiti's enterprise announcement and UniFi Network 10.2 operational features.

Do You Actually Need a 100G Core?

Probably not if your network is small, lightly loaded or mostly internet-bound. A business with a handful of access points, a few switches and a 1G or 10G internet connection does not become better simply because a 100G switch is installed in the rack.

A 100G core starts to make more sense when several of the following are true:

• Multiple 10G or 25G access and aggregation links converge in one location.
• Large amounts of traffic move internally between servers, storage, workstations or virtualisation hosts.
• The network spans multiple floors, buildings or major distribution areas.
• High-density WiFi, surveillance or media workloads create substantial sustained backbone traffic.
• Redundant core paths are required to reduce the impact of switch or link failure.
• The organisation expects meaningful growth and wants backbone headroom rather than an immediate redesign later.

For many SMBs, 10G access with 25G uplinks may be the more cost-effective sweet spot. The value of the new UniFi enterprise family is that an organisation can now build towards a 100G core when it genuinely needs one rather than forcing every deployment into the same topology.

Check the busy-hour traffic, not only the connector speed

Eight 25G links have a combined nominal line rate of 200 Gbps. That does not prove the network needs a 200G backbone: many access links are lightly loaded or peak at different times. Compare measured utilisation, simultaneous storage or backup jobs, latency and the capacity remaining after a planned link or switch failure.

If a design relies on two uplinks, check whether one surviving link can carry the required traffic. Also check the storage and server interfaces: a 100G core cannot remove a bottleneck at a 10G endpoint.

Which UniFi Enterprise Switch Should You Choose?

Choose ECS-Core when:

You need a dedicated 100G campus backbone, many high-speed aggregation links, significant east-west traffic or a resilient high-capacity core design. View Ubiquiti ECS-Core.

Choose ECS-Aggregation when:

You need to aggregate a large number of 25G links and uplink them towards 100G infrastructure. View Ubiquiti ECS-Aggregation.

Choose ECS-24S or ECS-48S when:

You need stackable multi-gigabit access but the connected endpoints have their own power supplies. Choose the 24-port or 48-port model around required density and the 2.5GbE/10GbE port mix. View ECS-24S or view ECS-48S.

Choose ECS-24S-PoE or ECS-48S-PoE when:

You are powering high-performance WiFi access points, cameras, phones or other PoE devices and also want the new stackable architecture. View ECS-24S-PoE or view ECS-48S-PoE.

Keep ECS-24-PoE or ECS-48-PoE in consideration when:

Your design does not require the new stacking architecture and the existing port mix better matches the environment. In particular, the ECS-48-PoE remains attractive where a large number of 10GbE access ports is more important than additional 2.5GbE density and stacking.

Who Should Consider the New UniFi Enterprise Stack?

The strongest candidates are organisations that want higher-end switching without abandoning UniFi’s centralised management experience. Typical examples include:

• multi-floor corporate offices
• schools and educational campuses
• hotels and hospitality properties
• warehouses and logistics facilities
• large retail environments
• high-density WiFi deployments
• media, creative and production environments moving large files
• organisations with fast NAS, SAN or server infrastructure
• multi-building networks requiring resilient fibre backbones

Ubiquiti also continues to position UniFi network management without recurring feature licensing fees. That can be commercially attractive, but licence cost should never be the only design criterion. Hardware, optics, cabling, support expectations, implementation time, redundancy and lifecycle planning still need to be included in total cost of ownership.

Who Probably Does Not Need This Architecture?

A separate 100G core is usually excessive for a small office where most traffic goes to SaaS applications and the internet. If the highest internal link is 10G and there are only a few access switches, jumping straight to 100G may add cost without solving a real bottleneck.

Likewise, a non-PoE S model is not automatically better than its PoE counterpart, and a new S model is not automatically better than the existing ECS-PoE generation. Start with endpoint count, port speeds, PoE load, uplink requirement, redundancy target and expected traffic. Then choose the switch.

PoE Power Budgets: Shared Capacity vs Redundant Capacity

A 90 W per-port rating does not mean every port can deliver 90 W simultaneously. The total budget depends on mains voltage, installed power modules and the selected operating mode.

For example, a planned 600 W endpoint load exceeds the ECS-24S-PoE's listed 450 W redundant-mode budget with two 600 W modules, even though it fits within the 1,050 W shared-mode figure. Size the design for the required failure condition, with suitable headroom, UPS capacity and power feeds.

Check the selected configuration against the official ECS-24S-PoE and ECS-48S-PoE specifications. Other voltage and power-module combinations have different budgets.

Enterprise Deployment Checklist

For office, campus and multi-building deployments, the switch specification is only one part of the project. Before ordering a high-speed enterprise stack, check the complete physical and operational design:

• Rack depth and support: Enterprise Campus hardware is full-depth rack equipment. Verify cabinet depth and support before deployment.
• UPS and power feeds: High-power PoE and redundant switching need appropriate power capacity, circuit planning and UPS runtime.
• PoE budget: Size the total PoE requirement based on actual endpoint draw and the redundancy mode of the power supplies, not just the per-port maximum.
• Cooling: Dense 10G, 25G and 100G switching produces more heat than a small SMB switch. Rack airflow and room cooling matter.
• Copper cabling: Confirm the installed structured cabling supports the intended 2.5GbE or 10GbE distance and environment.
• Fibre and optics: Choose compatible SFP28/QSFP28 optics or DACs for every 25G and 100G link. For short rack-to-rack links, the Ubiquiti UACC-DAC-QSFP28 100G cable may be relevant where distance and compatibility suit the deployment.
• Redundant path design: Redundant switches only help when power, fibre routes and upstream connections are also designed to avoid a single point of failure.
• Software release validation: Confirm the UniFi Network release and feature support required for the planned stacking, MC-LAG or operational workflow before commissioning.

FAQ

What is the Ubiquiti ECS-Core?

The Ubiquiti ECS-Core is a Layer 3 enterprise core switch with 32 × 100G/40G QSFP28 interfaces, 3.2 Tbps non-blocking throughput, MC-LAG, dual hot-swappable power supplies and hot-swappable cooling modules. It is designed for high-capacity UniFi campus backbone deployments.

What is the difference between ECS-24S and ECS-24S-PoE?

Both provide 8 × 2.5GbE, 16 × 10GbE, 4 × 25G SFP28 and two dedicated 100G stacking interfaces. ECS-24S-PoE additionally supplies PoE to compatible endpoints, while ECS-24S is intended for devices that have their own power source.

What is the difference between ECS-24S and ECS-48S?

ECS-24S has 24 copper access ports: 8 × 2.5GbE and 16 × 10GbE. ECS-48S has 48 access ports: 32 × 2.5GbE and 16 × 10GbE. Both provide four 25G SFP28 uplinks and two dedicated 100G QSFP28 stacking interfaces.

Are the S models' 100G ports ordinary uplinks?

No. The rear QSFP28 interfaces are dedicated to stacking. Use the front SFP28 interfaces for 25G uplinks and check the exact supported configuration.

Can ECS-24S and ECS-48S join the same stack?

No. Current Ubiquiti guidance requires matching access-port counts within a stack. Plan 24-port and 48-port stacks separately.

Does every enterprise network need 100G?

No. 100G becomes useful when many 10G or 25G links converge, internal data traffic is high, multiple buildings or distribution areas are involved, or substantial growth and redundancy are planned. Smaller networks may be better served by 10G access and 25G uplinks.

Does ECS-Core replace ECS-Aggregation?

No. ECS-Core and ECS-Aggregation serve different layers. ECS-Core provides dense 100G core connectivity, while ECS-Aggregation provides a high-density 25G aggregation layer with 100G uplinks.

Are ECS-48S and ECS-48S-PoE faster than ECS-48-PoE?

Not in every raw throughput metric. ECS-48-PoE provides 460 Gbps non-blocking throughput and more 10GbE access ports, while ECS-48S and ECS-48S-PoE provide 340 Gbps non-blocking throughput, more 2.5GbE access ports and dedicated 100G stacking interfaces. The better choice depends on architecture and endpoint mix.

Does UniFi enterprise networking require recurring network licence fees?

Ubiquiti states that its UniFi networking functions are provided without recurring licensing fees. Organisations should still budget for hardware, implementation, optics, cabling, support requirements, power protection and lifecycle costs.

Summary: Is the New UniFi Enterprise Stack Right for Your Network?

The 2026 release gives UniFi a more complete core-to-access architecture built around 100G core switching, high-density 25G aggregation, multi-gigabit stackable access and improved resilience and operational tooling. For larger networks, the key question is no longer whether the product family has a clear enterprise hierarchy, but how much of that hierarchy the actual deployment needs.

The bigger story is not simply the ECS-Core. It is how ECS-Core, ECS-Aggregation, ECS-24S, ECS-24S-PoE, ECS-48S and ECS-48S-PoE can be combined around the actual needs of the site.

Design from the workload backwards. Start with endpoints, required port speeds, PoE demand, fibre paths, redundancy and expected traffic. Add 25G or 100G where it solves a real bottleneck or creates useful headroom, not simply because the specification exists.

For organisations planning a new UniFi campus, high-speed office network or enterprise refresh, view the UniFi enterprise switch range, or speak with our team if you need help with topology planning, fibre links, optics, PoE sizing, rack infrastructure or migration planning.

Official Specifications and Deployment References

• ECS-Core specifications and ECS-Aggregation specifications
• ECS-24S, ECS-48S, ECS-24S-PoE and ECS-48S-PoE specifications
• Existing ECS-24-PoE and ECS-48-PoE specifications
• Stacking requirements and operation
• Enterprise platform announcement, Network 10.2 operational features and official overview video