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10GBASE T ports work perfectly with our servers.
S4048T-ON
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Dell Networking S4048T-ON, 48x 10GBASE-T and 6x 40GbE QSFP +...
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S4048T-ON
- Description:
- Dell Networking S4048T-ON, 48x 10GBASE-T and 6x 40GbE QSFP + ports, airflow from IO to PSU, 2x AC PSU, OS9
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- GTIN:
- 11110487902
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S4048T-ON Overview
S4048T-ON is a high-performance network switch engineered with a modular architecture that supports both Layer 2 and Layer 3 operations. Designed for data centers and enterprise environments, it offers efficient stacking and scalability while delivering optimized performance under a variety of power options, including an AC power supply for reliable operations.
S4048T-ON integrates 48 fixed 10/100/1000 RJ45 downlink ports with 4 high-speed 10G SFP+ uplink ports to meet modern connectivity demands. Its robust port configuration, non-POE design, and advanced stacking capabilities make it an ideal fit for use cases ranging from campus networks to large-scale data center deployments.
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Request bulk order quote for S4048T-ON for additional pricing. Browse the full Dell Networking S4048-On Switches series or explore all Dell products.
S4048T-ON Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Power Consumption
- N/A
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Media Type Supported
- Twisted Pair
- Redundant Power Supply Supported
- No
- Manufacturer Part Number
- S4048T-ON
- Uplink Configuration
- 10G
- IOS
- IP Services
- POE Support
- Non POE
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Port/Expansion Slot Details
- 48×10/100/1000 RJ45 ports, 4×10G SFP+ uplink ports
- Flash Memory
- 256 MB
- Switching Capacity
- 176 Gbps
- Switching Capacity with Stacking
- 352 Gbps
- Product Name
- Dell Networking S4048T-ON
- Height
- 1.75 inches
- Width
- 19 inches
- Depth
- 17 inches
- Weight
- 23 lbs
S4048T-ON Use Case
Low-Latency Spine-Leaf Fabric for Virtualized Data Centers
In a virtualized data center requiring high east-west VM traffic, the Dell Networking S4048T-ON provides 48×10GBASE-T server uplinks and 6×40GbE QSFP+ spine connections under OS9. Front-to-back airflow and dual AC PSUs ensure reliability in dense rack deployments. Outcome: ultra-low latency (sub-microsecond), linear scale-out to thousands of VMs, and centralized OS9 automation for seamless live migration and micro-segmentation.
Cloud Service Provider Multi-Tenant Architecture with VXLAN EVPN
For cloud service providers hosting hundreds of tenants, the S4048T-ON delivers dedicated 10GBASE-T access ports per rack and 40GbE uplinks to the core fabric. OS9’s open networking supports VXLAN EVPN for secure multi-tenant overlay, while airflow from I/O to PSU optimizes datacenter cooling. Outcome: tenant isolation at scale, 40 Gbps bandwidth burst capacity, and 25% reduction in power and cooling costs.
Hyperconverged Infrastructure Networking for Data-Intensive Workloads
Enterprises deploying hyperconverged clusters (vSAN, Nutanix, VMware) use the S4048T-ON’s 48×10GBASE-T ports for server connectivity and 6×40GbE for spine aggregation. OS9 integration with Ansible or Python APIs automates provisioning and telemetry. Outcome: 40% throughput improvement for database and analytics applications, simplified network operations, and enterprise-grade redundancy with dual AC power.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| S4048T-ON |  S4048 1 Year NBD |  S4048-ON |  S4048 3 Years * 4h | |
|---|---|---|---|---|
| Depth | 17 inches | 12 inches | 12 inches | N/A |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 64 MB | 256 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.75 inches | N/A |
| IOS | IP Services | LAN Lite | IP Lite | LAN Base |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | S4048T-ON | S4048 1 Year NBD | S4048-ON | S4048 3 Years * 4h |
| Media Type Supported | Twisted Pair | Twisted Pair / Fiber | Twisted Pair / Fiber | Combo |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 48 Ports | 8 Ports | 48 Ports | 8 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 48×10/100/1000 RJ45 ports, 4×10G SFP+ uplink ports | 48 fixed 10/100/1000 Ethernet ports and 4 dedicated 10G SFP+ uplink ports | N/A | N/A |
| Power Consumption | N/A | 150 W | N/A | N/A |
| Power Source | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Dell Networking S4048T-ON | S4048 1 Year NBD Switch | Dell Networking S4048-ON | S4048 3 Years * 4h |
| Product Type | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | No | Yes | No | No |
| SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 176 Gbps | 256 Gbps | 176 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 352 Gbps | 512 Gbps | N/A | 256 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G |
| Weight | 23 lbs | 15 lbs | 18 lbs | N/A |
| Width | 19 inches | 17.5 inches | 17.5 inches | N/A |
Reviews & Ratings
F
Faisal Karim
4
Strong performance and redundant power supplies.
M
Mads Sorensen
5
Reliable under sustained workloads.
K
Kevin Lawson
5
Good fit for copper based data centers.
R
Rehan Siddiq
5
Consistent Dell quality.
Questions & Answers
What is the Dell Networking S4048T-ON switch?
The Dell Networking S4048T-ON is a top-of-rack, layer 2/3 Ethernet switch featuring 48x 10GBASE-T and 6x 40GbE QSFP+ ports, running Dell OS9 for advanced programmability and high performance.
Which operating system does the S4048T-ON use?
The S4048T-ON ships with Dell OS9, a modular, Linux-based operating system that supports advanced automation, open networking, and third-party applications.
How much switching capacity does the S4048T-ON provide?
The S4048T-ON delivers up to 1.28 Tbps of non-blocking switching capacity with 960 Mpps forwarding performance, ensuring low latency and no packet drops under full load.
What port types and speeds are supported?
It supports 48x 10GBASE-T RJ45 ports for copper connectivity and 6x 40GbE QSFP+ ports for high-density uplinks or server pooling.
What is the airflow direction for this switch?
The S4048T-ON has front-to-back (IO to PSU) airflow, optimizing cooling in data center rack environments by pushing hot air toward the rear exhaust.
How many power supply units (PSUs) are included?
This model ships with two hot-pluggable AC power supplies for full redundancy and continuous operation in case of PSU failure.
Is the S4048T-ON eligible for stacking or MLAG?
Yes, Dell OS9 supports Multi-Chassis Link Aggregation (MLAG) for active/active link redundancy, but this platform does not support physical stacking.
What virtualization features are available?
The switch supports VMware NSX, VXLAN, virtual link trunking (VLT), and OpenStack integrations for seamless network virtualization and multi-tenant isolation.
Does the S4048T-ON support advanced automation?
Yes, it offers full RESTful APIs (Redfish, OpenSwitch), Python scripting, Ansible, Chef, and Puppet modules for comprehensive automation and orchestration.
What management options are provided?
You can manage the switch via CLI, web GUI, SNMP, and out-of-band management through a dedicated management port for simplified administration.
What is the typical power consumption?
At average load, the S4048T-ON consumes approximately 350W, with maximum consumption under 500W when fully populated and under full load.
What form factor and rack alignment does it use?
It is a 1RU rack-mountable switch designed for standard 19-inch racks, delivering high port density in a compact footprint.
Which environments is the S4048T-ON ideal for?
This switch is ideal for data centers, enterprise core/distribution layers, high-performance computing clusters, and virtualization environments requiring low latency and high throughput.
Does Dell offer a warranty and support for this switch?
Yes, Dell provides a limited lifetime warranty on the hardware and 3-year ProSupport with next-business-day onsite service, upgradeable to ProSupport Plus.
Can I customize the ONIE loader or other software?
Yes, the S4048T-ON includes ONIE (Open Network Install Environment) allowing you to install third-party network operating systems alongside Dell OS9.
What compliance and safety certifications does it hold?
The S4048T-ON complies with RoHS, CE, UL, FCC, and CSA standards, ensuring safety, environmental, and electromagnetic compatibility in global data centers.