The Arista DCS-7124SX-R is a high-performance, ultra-low latency Layer 2/3/4 10 Gigabit Ethernet switch designed for data center spine and aggregation tier deployments. Housed in a compact 1RU form factor, it delivers 480 gigabits per second throughput and 360 million packets per second with wire-speed L2 and L3 forwarding. The rear-to-front airflow variant includes four N+1 redundant hot-swappable fans and dual 1+1 redundant 460W AC power supplies for high availability. With 24 1/10GbE SFP/SFP+ ports, it supports advanced Layer 2 features including 16-port link aggregation groups, Multi-Chassis LAG for active/active multipathing, and 4094 VLANs. Layer 3 capabilities include 16-way ECMP routing, 16K IPv4 routes, 4K IPv6 routes, BGP, OSPF, and PIM-SM multicast. The switch features a dual-core x86 CPU with 4GB DRAM, 2GB Flash, and optional 50GB SSD for logging and packet capture. Typical power consumption is 5W per port. Built-in security includes ACLs, Control Plane Protection, TACACS+, and RADIUS authentication. Data center optimization features include Latency Analyzer (LANZ), Zero Touch Provisioning (ZTP), Per-Priority Flow Control (PFC), and Data Center Bridging Extensions (DCBX) support. Ideal for cloud providers, financial services, HPC clusters, and enterprises requiring deterministic, low-latency east-west traffic patterns.
480Gbps switching capacity with 360M pps throughput.
24x 10GbE SFP/SFP+ ports in compact 1RU form factor.
Ultra-low 500 nanosecond latency for deterministic performance.
Dual 460W hot-swappable power supplies with N+1 fan redundancy.
16-way ECMP, Multi-Chassis LAG, and 4094 VLAN support.
Integrated SSD option for packet capture and event logging.
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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 #
DCS-7124SX-R
Brand
Arista
Condition
Refurbished
CLI
Industry-standard command-line interface
ECMP
16-way equal-cost multipath routing
Fans
4x N+1 redundant hot-swappable
Model
7124SX
Airflow
Rear-to-front (DCS-7124SX-R) or front-to-rear (DCS-7124SX-F)
Multicast
IGMP v1/v2/v3 snooping, PIM-SM, Anycast RP
QoS Queues
8 priority queues per port
VM Support
User applications can run in virtual machines
Compatible systems
The DCS-7124SX-R is compatible with standard 10GbE SFP/SFP+ optics and twinax copper cables. It runs Arista EOS natively and supports user applications via embedded Linux VMs. Integrates with VMware vSphere environments and standard SNMP-based network management platforms. Requires dual 460W AC power supplies and standard 19-inch rack mounting infrastructure.
Arista Networks 7100 Series
Model: DCS-7124SX-F, DCS-7124SX-R
Form factor: 1RU
Generation: 7100 Series
DCS-7124SX-R is rear-to-front airflow variant; DCS-7124SX-F is front-to-rear airflow variant with identical specifications
Best for
Data Center Spine/Aggregation
High-performance switching fabric for data center core and aggregation layers requiring non-blocking 480Gbps throughput with 500ns ultra-low latency for east-west traffic optimization.
Cloud Service Provider Networks
Multi-tenant cloud infrastructure deployments leveraging 16-way ECMP, Multi-Chassis LAG, and advanced QoS with per-priority flow control for deterministic performance across virtualized workloads.
High-Performance Computing (HPC)
Scientific computing and AI/ML cluster interconnects requiring wire-speed forwarding, minimal latency variance, and 360M pps throughput for tightly-coupled parallel applications.
Financial Services Networks
Low-latency trading and market data distribution networks demanding sub-microsecond latency, stateful fault repair, and live patching without service interruption.
Details
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Strict priority, 802.1p classification, DSCP classification/remarking, Per-Priority Flow Control (PFC), Data Center Bridging Extensions (DCBX), policers, rate limiting
VLAN Support
4,094 VLANs
EMI Standards
FCC Part 15 Class A, ICES-003 Class A, VCCI Class A
Flash Storage
2 GB
Live Patching
Supported
Spanning Tree
802.1w RSTP, 802.1s MSTP, RPVST+
Storm Control
Supported
Authentication
TACACS+, RADIUS, AAA
Restore Option
USB restore capability
Forwarding Rate
Wire-speed L2 and L3
Max Input Power
210W
Link Aggregation
802.3ad LACP, 16 ports per LAG, 256 groups per system
Regulatory Marks
CE, UL, TUV
Safety Standards
IEC/UL/CSA/EN 60950
Supported Optics
10GBASE-CR (twinax copper, 7m max)
Routing Protocols
BGP, OSPF, static routes, VRRP, VARP
Security Features
ACLs (L2/L3/L4), Control Plane Protection (CPP), MAC Security
Switching Capacity
480 Gbps full-duplex
Monitoring Features
Latency Analyzer (LANZ), Zero Touch Provisioning (ZTP), SSD for logging and packet capture
L2 Forwarding Entries
16,000
Stateful Fault Repair
Self-healing software with SFR
Memory
System Memory
4 GB DRAM
Management & Protocols
IPv6 Management
Supported
Management Protocol
SNMP v2, SNMP v3, Telnet, SSHv2, Syslog
Power Consumption
Input Voltage
100-240V AC
Power Supplies
2x 460W AC (1+1 redundant, hot-swappable)
Typical Power Consumption
5W per port
Physical Characteristics
Form Factor
1RU rack-mount
Multi-Chassis LAG
32 ports per MLAG, active/active multipathing
Interface/Ports
USB Port
1x USB
Port Type
SFP/SFP+ 10GbE
Port Count
24 ports
Port Speed
1/10 Gigabit Ethernet
Console Port
1x RS-232 serial (RJ-45)
Port Mirroring
Supported
Management Port
1x 100/1000 Mbps
Operating System
VMware Integration
VMware vSphere support, VM auto-discovery, VM adaptive segmentation, VM host view
Drive Performance
Latency
500 nanoseconds
Throughput
360 million packets per second
Processor & Chipset
CPU
Dual-core x86
Compliance Standards
RoHS Compliance
RoHS-6 compliant
Controller/Indicator
Blue Beacon LED
System identification
Environmental Condition
Relative Humidity
5 to 95%
Operating Altitude
0 to 10,000 feet
Storage Temperature
-40 to 70°C
Operating Temperature
0 to 40°C
Enterprise Data Center Consolidation
Virtualized enterprise environments with VMware vSphere integration, VM auto-discovery, adaptive segmentation, and comprehensive TACACS+/RADIUS authentication for multi-tenant isolation.
Storage Area Network (SAN) Fabric
Fibre Channel over Ethernet (FCoE) and iSCSI deployments utilizing jumbo frames (9216 bytes), DCBX, and priority-based flow control for lossless storage traffic.
Frequently asked questions
What is the switching capacity and packet throughput of the DCS-7124SX-R?
The DCS-7124SX-R delivers 480 gigabits per second (Gbps) full-duplex switching capacity with 360 million packets per second (Mpps) throughput across all 24 ports simultaneously. This non-blocking architecture ensures wire-speed L2 and L3 forwarding with ultra-low 500 nanosecond latency, making it ideal for high-performance data center deployments requiring deterministic east-west traffic patterns.
What cooling and power redundancy features does the rear-to-front airflow model include?
The DCS-7124SX-R (rear-to-front variant) includes four N+1 hot-swappable fans and dual 1+1 redundant 460W AC power supplies rated for 100-240V input. Typical power consumption is 5W per port (approximately 120W base load). The N+1 fan architecture allows continued operation with one fan failure, while 1+1 power redundancy ensures automatic failover without service interruption.
What Layer 2 and Layer 3 routing capabilities are supported?
Layer 2 features include 16K forwarding entries, 802.3ad link aggregation (up to 16 ports per LAG, 256 groups), Multi-Chassis LAG for active/active multipathing, 4094 VLANs, Q-in-Q, rapid spanning tree, and IGMP snooping. Layer 3 includes 16K IPv4 routes, 4K IPv6 routes, 16-way ECMP, BGP, OSPF, PIM-SM multicast, VRRP, and virtual ARP (VARP) for anycast gateway deployments.
What security and authentication mechanisms are built-in?
Security features include ACLs using L2/L3/L4 fields, Control Plane Protection (CPP), MAC Security, TACACS+ and RADIUS authentication, and SNMPv3 for encrypted management. The switch supports SSH v2 and Syslog for secure remote access and event logging. VM Tracer provides VMware vSphere integration with VM auto-discovery and adaptive segmentation for multi-tenant isolation.
Does the DCS-7124SX-R support data center bridging and quality of service features?
Yes. The switch supports Data Center Bridging Extensions (DCBX), Per-Priority Flow Control (PFC), and 8 priority queues per port with strict priority queueing. QoS features include 802.1p-based classification, DSCP-based classification and remarking, policers, and rate limiting. These capabilities enable lossless Ethernet for storage protocols like FCoE and iSCSI while maintaining deterministic latency for latency-sensitive applications.
What management and monitoring capabilities are available?
Management includes 100/1000 Mbps management port, RS-232 serial console (RJ-45), USB port, SNMP v2/v3, Telnet, SSHv2, and Syslog. The integrated Latency Analyzer (LANZ) provides real-time visibility into packet latency distribution. Zero Touch Provisioning (ZTP) enables automated configuration. Optional 50GB SSD supports packet capture, event logging, and data analysis for troubleshooting and performance optimization.
What SFP optics and cable types are supported for connectivity?
The DCS-7124SX-R supports 10GBASE-CR twinax copper cables with maximum 7-meter reach. Additional SFP/SFP+ optics modules (sold separately) enable fiber connectivity options including 10GBASE-SR (multimode, 300m), 10GBASE-LR (single-mode, 10km), and 10GBASE-ZR (single-mode, 80km) for extended reach deployments.
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