S4820T - Dell Networking S4820T Switch

Name: S4820T - Dell Networking S4820T Switch
Brand: Dell
SKU: S4820T
Price: 412 USD
Availability: InStock

S4820T - Dell Networking S4820T Switch | US IT Hardware

Product overview

The Dell Networking S4820T is a purpose-built, high-performance top-of-rack (ToR) switch engineered for large-scale enterprise data centers. This 1RU switch provides 48 flexible 1/10GBase-T copper ports supporting 100Mb, 1Gb, and 10Gb speeds, complemented by four 40GbE QSFP+ uplinks that can be broken out into 10GbE connections. With a non-blocking, full-duplex switching fabric delivering 1.28Tbps capacity and line-rate L2/L3 forwarding at 960 Mpps, the S4820T eliminates bottlenecks in high-density server and storage environments. The switch features advanced data center capabilities including DCB (Data Center Bridging) support for lossless iSCSI deployments, Virtual Link Trunking (VLT) for multi-path redundancy, and comprehensive QoS with 4 queues per port. With 128K MAC addresses, 16K IPv4 routes, and 3.3µs latency, it delivers enterprise-grade reliability and performance. The S4820T runs Dell Networking OS9, offering intuitive management, jumbo frame support, and seamless integration with Dell 12G rack servers and blade systems.

1.28Tbps full-duplex switching fabric with non-blocking architecture.
48x 1/10GBase-T ports plus 4x 40GbE QSFP+ uplinks in 1RU form factor.
3.3µs latency and 960 Mpps forwarding rate for line-rate performance.
DCB, PFC, and ETS support for lossless iSCSI and storage deployments.
VLT and eVLT multi-path redundancy with dynamic master election.
128K MAC addresses, 16K IPv4 routes, 64 VRF instances for scalability.

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	S4820T
Brand	Dell
Condition	Refurbished
Cooling	2x hot-swappable fan modules, IO-to-PSU or PSU-to-IO airflow
Model Name	Dell Networking S4820T
IPv4 Routes	16,000 routes
IPv6 Routes	8,000 routes (shared CAM space with IPv4)
Power Input	100-240V AC, 50-60 Hz
Jumbo Frames	Supported for high-end performance in virtualized and IP storage environments
Product Line	Dell Networking S-Series / Force10
Product Type	Data Center Top-of-Rack (ToR) Network Switch

Compatible systems

The Dell S4820T is optimized for Dell enterprise infrastructure including 12G PowerEdge servers, blade systems with MXL switches, Force10 Z-Series core switches, and EqualLogic storage arrays. It supports standard 10GbE and 40GbE transceiver optics, dual AC power supplies, and integrates seamlessly into existing data center cooling and rack infrastructure. Management via Dell Networking OS9, SNMP, and syslog enables integration with enterprise monitoring and orchestration platforms.

Dell PowerEdge 12G Rack Servers
Model: R620, R720, R820, R720xd
Form factor: 1U, 2U, 4U Rack
Generation: 12th Generation
Native 10GbE connectivity via X520 or X540 adapters; optimized for ToR deployment with Dell servers.
Dell PowerEdge M-Series Blade Servers
Model: M620, M720
Form factor: Blade Chassis
Generation: 12th Generation
Integrates with Dell Networking MXL blade switch for modular data center architecture.
Dell Force10 Z-Series Core Switches
Model: Z9000, Z9100
Form factor: Modular Chassis
Generation: Force10 Series
Creates two-tier non-blocking 1/10/40GbE data center network architecture with S4820T as ToR layer.
Dell EqualLogic Storage Arrays
Model: PS6000, PS6100, PS6200
Form factor: 2U/4U Rack
Generation: Enterprise SAN
Optimized for iSCSI deployments with DCB and PFC support for lossless storage traffic.

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QoS Features	Priority-based Flow Control (PFC), Enhanced Transmission Selection (ETS), DCBx, 4 priority queues per port

Layer 2 VLANs	4,096 VLANs (802.1Q)

VRF Instances	64 VRF-lite instances

MSTP Instances	64 instances (802.1s)

Forwarding Rate	960 Mpps (million packets per second)

Layer 2 Features	STP (802.1D), RSTP (802.1w), MSTP (802.1s), LLDP (802.1AB), CFM (802.1ag), L2 multipath via VLT/eVLT

Layer 3 Features	IPv4/IPv6 routing, OSPF, BGP, RIP, static routing, policy-based routing

Link Aggregation	8 links per group, 128 groups per stack (802.3ad)

Security Features	Port security, DHCP snooping, Dynamic ARP Inspection (DAI), access control lists (ACLs), 802.1X authentication

Stacking Capacity	160 Gbps, ring topology with dynamic master election

Typical Use Cases	Data center top-of-rack (ToR), cloud infrastructure, iSCSI storage networks, HPC clusters, enterprise web 2.0 deployments, virtualized environments

Data Center Bridging	Full DCB support (PFC, ETS, DCBx) for lossless iSCSI and storage deployments

Virtual Link Trunking	VLT and enhanced VLT (eVLT) for active-active multi-path redundancy

Switching Architecture	Non-blocking, cut-through (default store-and-forward) switching

Compatible Core Switches	Dell Force10 Z-Series (Z9000, Z9100) for two-tier non-blocking data center architecture

Switching Fabric Capacity	1.28 Tbps full-duplex (non-blocking), 640 Gbps half-duplex

Transceiver Support - 1GbE	Breakout QSFP+ to 4x1000Base-T passive DAC (1m)

Compatible Server Platforms	Dell PowerEdge 12G (R620, R720, R820, R720xd), M-Series blade servers (M620, M720) with MXL blade switch

Transceiver Support - 10GbE	SFP+ modules; passive DAC cables (0.5m, 1m, 3m, 5m, 7m); active optics for longer distances

Transceiver Support - 40GbE	QSFP+ modules (SR, ESR); breakout QSFP+ to 4x10GbE passive DAC (0.5m-7m); active optics available

Compatible Storage Platforms	Dell EqualLogic PS-Series (PS6000, PS6100, PS6200) for iSCSI SAN deployments

Packet Buffer Memory	9 MB

MAC Address Table	128,000 entries

Syslog	RFC 3164 compliant event logging
SNMP Support	SNMPv1, SNMPv2c, SNMPv3

Power Consumption

Power Supply	Dual redundant, hot-swappable 460W AC PSUs (920W total)
Maximum Power Consumption	920W (dual 460W PSUs at full capacity)
Typical Power Consumption	Approximately 350-400W under normal operation

Form Factor	1RU rack-mount chassis

Interface/Ports

Total Ports	52 ports (48x 1/10GBase-T + 4x 40GbE QSFP+)
Copper Ports	48x 1/10GBase-T (RJ45), supporting 100Mb, 1Gb, 10Gb speeds
Queues Per Port	4 priority queues
Fiber Uplink Ports	4x 40GbE QSFP+ ports, breakout-capable to 4x10GbE per port
Management Interface	Out-of-band management port, web GUI, CLI (SSH, Telnet, serial console)

Operating System	Dell Networking OS9

Packet Latency	3.3 microseconds

CPU Memory	2 GB DRAM

Weight	Approximately 25 lbs (11.3 kg)
Dimensions	1.73 inches height (1RU), standard 19-inch rack width

Compliance Standards

RoHS Compliance	RoHS 2 compliant (2011/65/EU)
WEEE Compliance	WEEE directive compliant for end-of-life recycling
Compliance Standards	IEEE 802.1AB (LLDP), 802.1ag (CFM), 802.1D (STP), 802.1p (L2 prioritization), 802.1Q (VLAN), 802.1w (RSTP), 802.1s (MSTP), 802.3ad (LAG), 802.1X (authentication)

Environmental Condition

Noise Level	Approximately 65-70 dB (typical operation)
Operating Humidity	10% to 90% non-condensing
Storage Temperature	-4°F to 149°F (-20°C to 65°C)
Operating Temperature	32°F to 104°F (0°C to 40°C)

Frequently asked questions

What is the total switching capacity and forwarding rate of the S4820T?

The Dell S4820T delivers 1.28Tbps full-duplex switching fabric with 640Gbps half-duplex capacity and 960 Mpps (million packets per second) forwarding rate. This non-blocking, cut-through architecture (default store-and-forward mode) ensures line-rate L2/L3 performance across all 48 ports simultaneously, eliminating throughput bottlenecks in high-density data center environments.

How does the S4820T support iSCSI storage networks?

The S4820T implements Data Center Bridging (DCB) standards including Priority-based Flow Control (PFC) and Enhanced Transmission Selection (ETS), coupled with DCBx protocol support. This enables lossless Ethernet delivery for block-level storage traffic, preventing packet loss and retransmission overhead critical for reliable iSCSI SAN deployments at line rate.

What redundancy and multi-path options are available?

The switch supports Virtual Link Trunking (VLT) and enhanced VLT (eVLT) for active-active multi-path forwarding without spanning tree blocking. Ring stacking topology with dynamic master election allows up to 160Gbps stacking capacity across multiple units, with 8 links per aggregation group and 128 groups per stack for flexible redundancy.

What are the port density and uplink options?

The S4820T provides 48x 1/10GBase-T copper ports supporting 100Mb, 1Gb, and 10Gb speeds, plus 4x 40GbE QSFP+ uplinks. Each QSFP+ can be broken out into four 10GbE connections using passive DAC cables (0.5m to 7m lengths) or active optics, enabling flexible uplink configurations from 40GbE to 160GbE aggregate capacity.

What management and monitoring capabilities does the S4820T offer?

The switch runs Dell Networking OS9, providing intuitive web-based and CLI management interfaces with advanced monitoring and serviceability functions. It supports LLDP (802.1AB), Connectivity Fault Management (802.1ag), STP (802.1D), and comprehensive syslog/SNMP capabilities for integration with enterprise network management platforms.

How does the S4820T handle VLAN and routing scalability?

The S4820T supports 4K Layer 2 VLANs, 16K IPv4 routes (8K IPv6 routes in shared CAM), and 64 VRF-lite instances for multi-tenant isolation. With 128K MAC address table capacity and 64 MSTP instances, it scales to large enterprise networks requiring complex logical segmentation and routing policies.

What power and cooling specifications should be considered for deployment?

The S4820T features dual redundant, hot-swappable 460W AC power supplies (920W total) and supports both IO-panel-to-PSU and PSU-to-IO-panel airflow configurations for flexible data center cooling integration. The 1RU form factor and efficient power design minimize rack space and operational costs in dense deployments.

Dell Networking S4820T Switch

Product overview

Featuring

Compatible systems

Details

Shipping, warranty & returns

Customer reviews

Memory

Network & Communication

Management & Protocols

Power Consumption

Physical Characteristics

Interface/Ports

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