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Built for Next-Generation Data Centers

CS81-24Q8QDA

200G Access Switch

Overview

The CS81-24Q8QDA is a high-performance, high-density 400GbE/200GbE Ethernet switch, purpose-built for flexible leaf-layer deployment in hyperscale datacenter networks.

Compact in design, the 1RU chassis integrates 24 × 200G QSFP56 and 8 × 400G QSFP-DD ports, delivering up to 16 Tbps non-blocking switching capacity with full L2/L3 feature support.

Pre-installed with ONIE (Open Network Installation Environment), the CS81-24Q8QDA supports open-source SONIC and multiple commercial network operating systems (NOS).

Application

Datacenter leaf switch

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Product Features

Compact Design

  • 24 × QSFP56 100GbE + 8 × QSFP-DD 400GbE ports
  • Up to 16 Tbps full-duplex switching capacity

High Reliability

  • Redundant design for power supply and fan
  • Software real-time monitoring of system status

OS Compatibility

  • Pre-loaded with Open Network Install Environment (ONIE), supporting open-source SONIC and multiple commercial NOS

Technical Specifications

Hardware Specifications

Service Port24x 200G QSFP56 (4x56G PAM4) + 8x 400G QSFP-DD (8x56G PAM4)
Service Port IndicationQSFP56: 1 LED/Port; QSFP-DD: 1 LED/Port
Switching ASICBroadcom BCM56780 (Trident4)
Switching Capacity16Tbps full-duplex
Management Port1x 10/100/1000Base-T MGMT
1x USB 2.0 Type A
1x RJ45 Console
3x Status LED (Yellow-Green Bi-Color)
CPUCPU: Intel Xeon D-1734NT
2x SODIMM DDR4 slots, default 1x32GB
1x 240GB M.2 SSD
BMCAspeed AST2520
Power1+1 hot-pluggable, loading sharing, redundant 800W CRPS PSU
AC: 90-264VAC, HVDC: 180V-300VDC
FanN+1 redundancy, 6 fan modules
Airflow: F2B
Operating Temperature0°C to 40°C, 5% to 90% RH
Size440mm x 800mm x 43.1mm
Weight∼12.5kg

Software Specifications

System and Platform Infrastructure Features
  • Dynamic Port Breakout
  • DOM Information Display
  • System Locator LED Support (Beacon)
  • CMIS 4.0 Optics Support
  • CoPP (Control Plane Policing)
  • Transceiver Parameter Tuning
  • Third-Party Container Management
  • PDDF and PDK Framework
  • Maintenance Mode
    • LACP Graceful Shut
    • BGP Graceful Shut
    • OSPFv2 Maximum Metrics
  • Multi-Instance Redis DB
  • Zero Touch Provisioning (ZTP)
  • ZTP Provisioning using a USB Drive
  • Auto Negotiation and Link Training
  • Forwarding Plane Drop Counters
  • Time Zone Command Support
  • Broadcom Debug Tool
  • Interface Beacon LED
  • Support Option to Bind the Third-Party Container to the Management VRF
  • Limiting CPU/Memory/Disk Usage for Third Party Containers
  • Option to Send Audit Log Messages to Syslog Server
  • Multi-Site Data Center Interconnect(DCI)
  • Warm Reboot, Fast Reboot
Layer 2 Features
  • VLAN
  • Interface Hold-Down
  • Static LAG
  • LACP Graceful Shutdown
  • LACP Fast Rate and LACP Fallback LLDP
  • UDLD
  • PVST and RPVST+
  • STP, MSTP
  • DHCP snooping
  • Link Tracking
Layer 3 Features
  • IPv4,IPv6
  • IGMP
  • IPV6 Routing
  • Virtual Routing and Forwarding
  • Border Gateway Protocol
  • Next Hop Group (NHG) Support
  • IPv4 ARP
  • OSFv2
  • Route-Maps
  • Policy-Based Routing
  • Virtual Router Redundancy Protocol
  • Network Address Translation
  • ECMP load Sharing
  • IP Helper
  • RPVST, PVST, and MSTP over MC-LAG
ACL and Flow-Based Services
  • PBR Enhancements for Service Chaining
  • ACL-based CoPP
  • ACL DSCP Map/Remarking
  • ACL Rate Limiting
  • Control Plane ACL
  • Policy-based Routing (IPv4 and IPv6)
  • ACL-based Packet Replication
  • ACL Consistency Checker
Security Features
  • RADIUS and TACACS
  • RADIUS/TACACS Password Obfuscation
  • NTP Server and NTP Authentication
  • NTP Prefer Option
  • LDAP Integration
  • AAA Authorization support with TACACS+
Manageability Features
  • Industry Standard CLI (IS-CLI)
  • REST and gNMI Interfaces via OpenConfig YANG (OC-YANG)
  • Role-Based Access Control (RBAC)
  • RBAC and HAMd Enhancements
  • SNMP Configuration Traps and OIDs
  • gNMI Subscription Support for Limited YANG Paths (OnChange, Interval, Once, Poll, Target defined)
  • Bulking support in both REST(YANG patch) and gNMI
  • Query parameter for REST and filtering support for gNMI
  • Scalar encoding support for gNMI
  • Support to Read Service Tag via SNMP
  • SNMP Trap Enablement on Interface Instead of Global
Debuggability/ Serviceability features
  • In-memory Debug Logging
  • Audit Logging and Syslogs
  • Command to Return Interfaces to the Default Configuration
  • Port Mirroring on Port Channel and VLAN
QoS
  • Flow-Based QoS
  • Scheduler Policy
  • Port Shaping
  • Qos Maps
  • Control Plane Policing
  • Priority Flow Control
  • Storm Control
  • Buffer Management
Telemetry
  • sFlow
  • GRPC
  • Inband Flow Analytics
  • Packet Drop Monitoring
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  • 2026
  • SINGAPORE

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