210-ALSY - Dell EMC PowerSwitch S4128F-ON 28-Port Switch

Dell EMC S4128F-ON 1U Layer 2/3 switch with 28x 10GbE SFP+ ports and 2x 100GbE QSFP28 uplinks, running Dell OS10 for open networking.

The Dell EMC 210-ALSY (S4128F-ON) is a 1U top-of-rack (ToR) data center switch belonging to Dell's S4100-ON Series within the S-Series networking line. It is a PHY-less, Layer 2/3 managed switch offering 28 x 10GbE SFP+ ports for server and storage connectivity plus 2 x 100GbE QSFP28 ports for high-speed uplinks or stacking. The switch ships with Dell OS10 and supports ONIE (Open Network Install Environment), allowing zero-touch installation of alternate network operating systems for organizations pursuing disaggregated, open-networking architectures. With a switching capacity of 960 Gbps and a forwarding rate of 720 Mpps, it is designed for demanding enterprise and data center workloads requiring low latency, high port density, and advanced Layer 3 routing (OSPF, BGP-4, PBR). Redundant hot-swappable AC power supplies and back-to-front airflow support high-availability deployments.

• Manufacturer: Dell EMC
• Product Family: PowerSwitch S-Series / S4100-ON Series
• Model: S4128F-ON
• MPN: 210-ALSY
• Product Type: Managed Layer 2/3 Ethernet Switch (ToR)
• Ports: 28 x 10GbE SFP+ + 2 x 100GbE QSFP28
• Switching Capacity: 960 Gbps
• Forwarding Rate: 720 Mpps
• Latency: Approx. 800 nanoseconds
• MAC Address Table Size: 272,000 entries
• ARP Entries: 200,000
• IPv4 Routes: 200,000
• IPv6 Routes: 64,000
• IPv6 Hosts: 130,000
• Multicast Hosts: 8,000
• Link Aggregation Groups: 128 (32 links per group)
• Layer 2 VLANs: 4,000
• MSTP Instances: 32
• ACL Entries: 6,000 ingress / 1,000 egress
• Routing Protocols: OSPF, OSPFv2, BGP-4, Policy-Based Routing (PBR)
• Management: SNMP v1/v2, console management
• Security: RADIUS, TACACS authentication; MD5 encryption
• Operating System: Dell OS10 (ONIE-enabled for alternate NOS)
• Power: 2 x hot-swappable AC power supplies
• Form Factor: 1U rack-mountable
• Airflow: Back-to-front (IO to PSU)
• Networking Standards: IEEE 802.3
• Certifications: UL/CSA 60950-1, EN 60950-1, IEC 60950-1, EN 60825-1/2, FDA 21 CFR 1040.10/1040.11

• 28 x line-rate 10GbE SFP+ ports for server/storage connectivity
• 2 x 100GbE QSFP28 ports for uplinks or inter-switch stacking
• PHY-less, disaggregated hardware/software design for open networking
• ONIE support for zero-touch installation of third-party network OS
• Runs Dell OS10 with modular, Linux-based architecture
• 960 Gbps non-blocking switching capacity
• 720 Mpps packet forwarding rate for demanding workloads
• Advanced Layer 3 routing including OSPF and BGP-4
• Full iSCSI storage area network support including DCB
• Redundant, hot-swappable dual AC power supplies
• Compact 1U rack-mountable form factor
• Extensive ACL, VLAN, and MSTP scalability for enterprise networks

Designed for high-density top-of-rack switching in modern data centers and enterprise networks.

• Top-of-rack (ToR) switching for server racks in data centers
• 10GbE server and storage aggregation with 100GbE uplinks
• iSCSI and DCB-enabled storage area networking
• Open networking deployments using third-party NOS via ONIE
• Layer 3 routing and inter-VLAN traffic management in enterprise campuses
• High-availability network cores requiring redundant power
• Cloud and virtualization infrastructure requiring low-latency east-west traffic

• High 960Gbps switching capacity
• Low ~800ns latency for time-sensitive apps
• Flexible open networking via ONIE
• Redundant PSUs improve uptime
• Scalable L3 routing and VLAN support
• Compact 1U design saves rack space

• Form Factor: 1U rack-mountable
• Airflow: Back-to-front (I/O to PSU)
• Power Supplies: 2 x hot-swappable AC units
• Port Configuration: PHY-less, SFP+/QSFP28 based

Per available distributor and manufacturer-aligned documentation, this switch is validated for:

• Dell EMC OS10 network operating system
• ONIE-compatible third-party network operating systems
• 10GbE SFP+ optical/DAC transceivers
• 100GbE QSFP28 optical/DAC transceivers
• Dell S-Series/S4100-ON Series data center switch ecosystem
• iSCSI storage area networks with DCB support
• Standard 19-inch rack enclosures

Note: Specifications are drawn from distributor listings and Icecat data; always confirm exact transceiver and rail-kit compatibility with a Dell-authorized reseller before deployment.

• Dell EMC S4128F-ON switch unit (210-ALSY)
• 2 x AC power supply units
• Dell OS10 pre-installed

Q: What product does Dell MPN 210-ALSY refer to?

A: It refers to the Dell EMC PowerSwitch S4128F-ON, a 1U Layer 2/3 managed data center switch with 28 x 10GbE SFP+ ports and 2 x 100GbE QSFP28 ports.

Q: What is the switching capacity of the 210-ALSY?

A: According to distributor specification sheets, the switch offers a switching capacity of 960 Gbps and a forwarding rate of 720 Mpps.

Q: Does the 210-ALSY support alternate operating systems?

A: Yes, it includes ONIE (Open Network Install Environment), enabling zero-touch installation of third-party network operating systems in addition to Dell OS10.

Q: How many power supplies does this switch include?

A: It ships with two hot-swappable AC power supply units for redundancy and improved uptime, per reseller listings.

Q: What routing protocols does the S4128F-ON support?

A: Documented capabilities include OSPF, OSPFv2, BGP-4, and Policy-Based Routing (PBR) for advanced Layer 3 operations.

Q: What is the rack form factor of the 210-ALSY switch?

A: It is a compact 1U rack-mountable switch with back-to-front (I/O to PSU) airflow, suited for standard data center racks.

Q: Is the Dell 210-ALSY still available for purchase?

A: Multiple distributors currently list it as available (often as refurbished stock), though some regional resellers note it as no longer newly stocked, suggesting a mature but still supported product.