1KNC8 - Dell PowerSwitch S4048T-ON 48-Port 10GbE L3 Switch

Dell EMC PowerSwitch S4048T-ON (1KNC8): 1U Layer 3 top-of-rack switch, 48x 10GBase-T RJ45 ports, 6x 40GbE QSFP+ uplinks, dual redundant PSUs.

The Dell 1KNC8, officially known as the Dell EMC PowerSwitch S4048T-ON, is a high-density top-of-rack (ToR) Ethernet switch built for demanding data center and enterprise network environments. It provides 48 fixed 10GBase-T RJ45 ports supporting auto-negotiated 100M/1G/10G speeds for flexible copper server connectivity, plus 6 fixed 40GbE QSFP+ uplink ports for high-bandwidth aggregation to spine or core switches. With a non-blocking 1.44Tbps switching fabric, the switch delivers line-rate Layer 2 and Layer 3 forwarding, low latency, and supports advanced routing protocols including BGP, OSPF, ISIS, and VXLAN for network virtualization. It ships with ONIE support, enabling installation of Dell OS9 or Dell OS10 Enterprise Edition, and is commonly deployed for network aggregation, ToR, and spine/leaf data center architectures.

• Manufacturer: Dell
• Product Family: Dell EMC PowerSwitch S-Series
• Model: S4048T-ON
• MPN: 1KNC8
• Product Type: Layer 3 Managed Ethernet Switch
• Fixed Ports: 48 x 10GBase-T RJ45 ports (100M/1G/10G auto-negotiation)
• Uplink Ports: 6 x 40GbE QSFP+ ports
• Switching Capacity: 1.44 Tbps full-duplex, non-blocking
• Stacking: Supports stacking of up to 6 units
• Operating System: Dell Networking OS9 / Dell SmartFabric OS10 Enterprise Edition (ONIE support)
• Routing Protocols: BGP, OSPF, ISIS, VXLAN, MSTP, OpenFlow
• Management: RJ45 console, Micro-USB serial, USB 2.0 storage, 8GB SSD module, SNMP, CLI, web-based management
• Power Supply: 2 x redundant, hot-swappable 460W AC PSUs
• PoE: Not supported
• Transceivers: Not included
• Airflow: Standard (I/O to PSU)
• Form Factor: 1U rack-mountable
• Rail Kit: Rail kit and cables included
• Condition (as listed by resellers): New / Refurbished options available
• Warranty (reseller): 30 days to 1 year replacement warranty (varies by reseller)
• Deployment Use: Top-of-rack (ToR), network aggregation, spine/leaf architecture

• 48 fixed 10GBase-T RJ45 ports for flexible copper connectivity
• 6 x 40GbE QSFP+ uplink ports for high-bandwidth aggregation
• Non-blocking 1.44Tbps switching fabric for line-rate performance
• Layer 3 managed with advanced routing (BGP, OSPF, ISIS)
• VXLAN support for network virtualization and hypervisor-centric overlays
• ONIE support for installing alternate network operating systems
• Stackable design supporting up to 6 units
• Dual redundant, hot-swappable 460W AC power supplies
• Compact 1U rack-mountable design for data center racks
• Multiple management interfaces including CLI, SNMP, and web-based tools
• Low-latency cut-through switching for real-time applications
• Supports MSTP for resilient network topologies and OpenFlow for SDN integration

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

• Top-of-rack (ToR) switching in data center server racks
• Network aggregation for virtualization and cloud computing environments
• Spine/leaf architecture deployments for scalable data center fabrics
• High-speed server connectivity for storage and compute clusters
• Uplink aggregation to core or spine switches via 40GbE QSFP+ ports
• Enterprise campus core and aggregation switching
• Software-defined networking (SDN) deployments using OpenFlow

• High port density for large server racks
• Non-blocking fabric ensures wire-speed forwarding
• Flexible OS choice via ONIE installation
• Redundant power for high availability
• Stacking support simplifies scalability
• Advanced L3 features support complex networks

• Form Factor: 1U rack-mountable
• Airflow: Standard, I/O to PSU
• Power Supplies: 2 x redundant hot-swappable 460W AC PSUs
• Storage Temperature: -40°F to 158°F (-40°C to 70°C) non-operating (per S4048-ON family spec sheet)

Per available documentation and reseller listings, this product is validated for:

• Dell Networking OS9
• Dell SmartFabric OS10 Enterprise Edition
• ONIE-based third-party network operating systems
• 40GbE QSFP+ optical and copper transceivers/cables
• Dell S-Series stacking modules (up to 6 units)
• Standard 19-inch equipment racks
• VXLAN-enabled virtualized data center fabrics
• SDN controllers via OpenFlow integration

Note: Transceivers are not included with the switch and must be purchased separately; compatibility may vary by installed OS version.

• Dell EMC PowerSwitch S4048T-ON switch unit
• Rail kit for rack mounting
• Power cables
• Documentation (varies by reseller/condition)

Q: What product does the Dell MPN 1KNC8 correspond to?

A: 1KNC8 is the Dell part number for the Dell EMC PowerSwitch S4048T-ON, a 48-port 10GBase-T Layer 3 top-of-rack network switch.

Q: How many ports does the Dell 1KNC8 switch have?

A: It has 48 fixed 10GBase-T RJ45 ports plus 6 fixed 40GbE QSFP+ uplink ports, for 54 total ports.

Q: What is the switching capacity of the S4048T-ON?

A: The switch offers a non-blocking 1.44Tbps full-duplex switching fabric, enabling line-rate Layer 2 and Layer 3 forwarding.

Q: Which operating systems can run on the 1KNC8 switch?

A: It supports Dell Networking OS9 and Dell SmartFabric OS10 Enterprise Edition, and uses ONIE to allow installation of alternate network operating systems.

Q: Does the Dell 1KNC8 support stacking?

A: Yes, the S4048T-ON supports stacking of up to six units for increased scalability and redundancy.

Q: Is Power over Ethernet (PoE) supported on this switch?

A: No, PoE is not supported on the Dell 1KNC8 (S4048T-ON) switch.

Q: What power supply configuration does the switch use?

A: It uses two redundant, hot-swappable 460W AC power supply units for high availability.

Q: Are transceivers included with the Dell 1KNC8 switch?

A: No, transceivers for the 40GbE QSFP+ ports are not included and must be purchased separately.