S4128F-ON-RA - Dell EMC PowerSwitch 28x10GbE SFP+ 2x100GbE Switch

Dell EMC PowerSwitch S4128F-ON-RA 1U ToR switch: 28x 10GbE SFP+ ports, 2x 100GbE QSFP28 uplinks, 960Gbps switching capacity, ONIE open networking, rack rails included.

The Dell EMC PowerSwitch S4128F-ON-RA is a reseller-designated (Rack-rails/Rack-mount Airflow variant) configuration of Dell's S4128F-ON open networking Top-of-Rack switch, part of the S4100-ON Series. It provides 28 fixed 10GbE SFP+ ports and 2 fixed 100GbE QSFP28 uplink ports in a compact 1U chassis, delivering up to 960Gbps of non-blocking, cut-through switching capacity and 720Mpps forwarding rate. Built on the Open Network Install Environment (ONIE), it supports Dell's SmartFabric OS10 Enterprise Edition or select third-party network operating systems, enabling flexible Layer 2/Layer 3 switching, VXLAN gateway functionality, and DCB features. It is designed for data center, enterprise, and cloud top-of-rack deployments requiring high-density 10/25/100GbE connectivity, low latency, and hot-swappable redundant power and cooling.

• Manufacturer: Dell Technologies (Dell EMC)
• Product Family: Dell EMC PowerSwitch S-Series
• Product Series: S4100-ON Series
• Model: S4128F-ON (RA = reseller rack-rail/airflow variant)
• Product Type: Open Networking Top-of-Rack (ToR) Ethernet Switch
• Ports: 28x 10GbE SFP+ fixed ports, 2x 100GbE QSFP28 fixed uplink ports
• Switching Capacity: 960 Gbps (full-duplex, non-blocking, cut-through)
• Forwarding Rate: 720 Mpps
• Latency: Approximately 800 nanoseconds
• MAC Address Table: Up to 272,000 entries
• Routing Capacity: 1,000 IPv4 routes, 8,000 IPv6 routes, up to 130,000 IPv6 hosts
• CPU: 2-Core Intel Rangeley C2338 processor
• Memory: 4GB DDR3 SDRAM
• Flash/Storage: 16GB mSATA/M.2 SSD module
• Operating System: ONIE (Open Network Install Environment); supports Dell SmartFabric OS10 Enterprise Edition or 3rd-party NOS
• Power Supply: 2x hot-swappable AC PSUs, 100–240 VAC, 50/60 Hz
• Max Current Draw: 6A/5A at 100/120V AC; 3A/2.5A at 200/240V AC
• PoE: Not supported
• Airflow: Back-to-Front (PSU to I/O Panel Airflow / Reversed)
• Management Interfaces: 1x RJ45 RS232 console, 1x RJ45 micro-USB-B console, 1x RJ45 10/100/1000Base-T mgmt port
• Operating Temperature: 5°C to 40°C (short-term -5°C to 45°C)
• Storage Temperature: -40°C to 65°C
• Operating Humidity: 5% to 85% RH, non-condensing
• Dimensions (H x W x D): 1.71 in x 17.1 in x 18.1 in (43.5 x 434 x 460 mm)
• Weight: 19.66 lbs / 8.92 kg (with 2 PSUs)
• Certifications: RoHS, UL 60950-1, EN 300 386, EN 55024, EN 61000 series
• Warranty: Dell standard base hardware warranty (typically 5 years, extendable up to 7); reseller warranty terms vary (90 days–3 years)

• 28x 10GbE SFP+ ports plus 2x 100GbE QSFP28 uplinks for high-density connectivity
• 960Gbps non-blocking, cut-through switching fabric for line-rate performance
• Open Network Install Environment (ONIE) for flexible OS deployment
• Supports Dell SmartFabric OS10 Enterprise Edition or third-party network OS
• Layer 2 and Layer 3 Ethernet switching with OSPF, BGP, and PBR support
• VXLAN Gateway support for bridging virtualized and non-virtualized overlay networks
• Priority-based Flow Control (PFC), DCBX, and ETS for DCB environments
• Hot-swappable, redundant power supplies and fan modules
• Compact 1U rack-mountable chassis with included rack rails
• Low latency switching (~800 ns) suited for time-sensitive workloads
• VLT (Virtual Link Trunking) capability for stretching L2 VLANs across data centers
• Compatible with common open-source orchestration tools (Ansible, Puppet, Chef)

Designed for high-density top-of-rack connectivity in modern data center and enterprise network environments.

• Top-of-rack (ToR) switching in enterprise or cloud data centers
• Server and storage rack aggregation for 10GbE-connected hosts
• High-bandwidth applications such as video streaming and big data analytics
• Virtualized/converged data center deployments requiring VXLAN gateway functionality
• Layer 2/Layer 3 network segmentation with OSPF/BGP routing
• Data Center Bridging (DCB) environments for storage traffic convergence
• Network fabric uplinks requiring 100GbE QSFP28 connectivity

• High-density 10/100GbE port flexibility
• Non-blocking 960Gbps switching performance
• Low-latency operation for critical workloads
• Open networking OS choice via ONIE
• Redundant hot-swappable power and cooling
• Compact 1U footprint saves rack space

• Height: 1.71 in (43.5 mm)
• Width: 17.1 in (434 mm)
• Depth: 18.1 in (460 mm)
• Weight: 19.66 lbs (8.92 kg) with dual PSUs installed

Per available documentation, this product is validated for:

• Dell SmartFabric OS10 Enterprise Edition network operating system
• ONIE-compatible third-party network operating systems
• Dell EMC SmartFabric Director SDN management software
• Dell EMC PowerSwitch S4100-ON series rail and mounting accessories
• Dell EMC 10GbE SFP+ optical transceivers and DAC/AOC cables
• Dell EMC 100GbE QSFP28 transceivers and breakout cables
• Dell EMC PowerEdge servers and PowerVault/Compellent/EqualLogic storage arrays in Dell-validated network fabrics
• Standard 19-inch EIA equipment racks (2-post/4-post)

Note: The '-RA' designation is used by resellers (e.g., NetworkTigers, ServerOrbit) to denote a rack-rail-included configuration of the standard Dell EMC S4128F-ON switch (Dell part number 210-ALTF); it is not a distinct Dell factory model number, and units sold under this SKU may ship without a pre-installed OS10 license.

• 1x Dell EMC S4128F-ON-RA switch chassis
• 2x AC hot-swappable power supply units
• 4x hot-swappable fan modules (back-to-front airflow)
• 1x rack mounting rail kit
• Power cords (typically included per reseller listing)
• OS10 software/license typically not included on RA-designated units

Q: What does the '-RA' suffix mean on Dell S4128F-ON-RA?

A: The '-RA' suffix is used by networking resellers to indicate a specific stock configuration of the Dell EMC S4128F-ON switch that includes rack mounting rails and a defined airflow direction; it is not an official Dell factory part number.

Q: Does the S4128F-ON-RA include Dell OS10 software?

A: According to reseller listings, most S4128F-ON-RA units ship without OS10 pre-installed or licensed, requiring the customer to install OS10 or an alternative ONIE-compatible network operating system.

Q: What is the switching capacity and forwarding rate of this switch?

A: The switch delivers up to 960 Gbps non-blocking switching capacity with a forwarding rate of 720 Mpps, as confirmed by both Dell's official spec sheet and reseller documentation.

Q: How many and what type of ports does it have?

A: It has 28 fixed 10GbE SFP+ ports plus 2 fixed 100GbE QSFP28 uplink ports, per Dell's official installation guide.

Q: What operating temperature range does the switch support?

A: Per Dell's official installation guide, the operating temperature range is 5°C to 40°C, with short-term tolerance extending to -5°C to 45°C for limited operational hours.

Q: Can third-party network operating systems be installed?

A: Yes, the switch supports the Open Network Install Environment (ONIE), which allows installation of Dell SmartFabric OS10 or select third-party network operating systems.

Q: What are the physical dimensions and weight of the switch?

A: Per Dell's official installation guide, the chassis measures 1.71 in (43.5 mm) high, 17.1 in (434 mm) wide, and 18.1 in (460 mm) deep, weighing 19.66 lbs (8.92 kg) with two power supplies installed.

Q: Does Dell publish MTBF figures for this switch?

A: No; Dell's official support forum confirms that MTBF numbers are not publicly published for this switch model.