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Ruijie’s RG-S6990-128QC2XS is a breakthrough 400GE Switch designed for cloud-scale and AIGC data centers.
It delivers the core promise: a 4 RU chassis packing 128×400 GE QSFP112 ports plus 2×10 GE SFP+ for management, offering 102.4 Tbps non-blocking throughput and nanosecond-level failover—ideal as a Data Center Switch, cloud dc switch, and Spine Switch.
Verified Model Specifications
| Feature | RG-S6990-128QC2XS |
| Service Ports | 128×400 GE QSFP112 & 2×10 GE SFP+ |
| Switching Capacity | 102.4 Tbps non-blocking |
| Forwarding Rate | 21,000 Mpps |
| Packet Buffer | 113.66 MB on-chip |
| MAC/Route Tables | 1,000 K MAC; IPv4: 1,000 K; IPv6: 640 K |
| Redundancy | 2+2 hot-swap PSUs; 4+1 hot-swap fans; dual firmware bank |
| Form Factor | 4 RU; 446 × 800 × 173.6 mm; ~45 kg fully loaded |
| Power Consumption | Max 3,160 W; Typical 2,432 W; Static 433 W |
| Key Technologies | RDMA, PFC, ECN, RDLB, GDLB, ISSU, AI-Fabric O&M |
Core Features & Differentiators
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Ultra-High-Density 400 GE Access
Packs 128×400 GE QSFP112 ports into a 4 RU chassis, enabling massive east-west bandwidth for spine and core layers. -
Cloud-Scale Performance
102.4 Tbps fabric and 21,000 Mpps forwarding handle mixed flows—ideal for cloud data centers and AI-driven workloads. -
Zero-Loss Transport
Hardware-accelerated RDMA, Priority Flow Control (PFC), and Explicit Congestion Notification (ECN) eliminate packet loss in storage and AI fabric. -
AI-Powered Operations
RDLB (Remote Dynamic Load Balancing) and GDLB (Global Dynamic Load Balancing) optimize multi-path flows, reducing hotspots during AI training cycles. -
Carrier-Grade Availability
Hot-swappable PSUs/fans, ISSU, and sub-200 ms Virtual Stacking Unit (VSU) failover guarantee uninterrupted services. -
Comprehensive Layer 2/3 & Overlay
Supports VLAN, STP/MSTP, ERPS; OSPF v2/v3, BGP, IS-IS, MPLS, Segment Routing; plus VXLAN/EVPN for multi-tenant cloud fabrics. -
Scalable Management & Security
RGOS 12.X CLI, Web GUI, SNMPv3, NetConf, RESTful APIs, AI-Fabric telemetry, plus ACLs, CPP, NFPP, ARP inspection, and MAC security.
Deployment Scenarios
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Cloud DC Spine/Leaf Fabric
Deploy RG-S6990 as spine nodes—400 GE links to leaf switches, enabling seamless workload mobility across pods. -
High-Performance Compute Clusters
Serve AI/HPC clusters with lossless 400 GE interconnects and RDMA for ultra-low latency. -
Enterprise Core/Aggregation
Aggregate 100 GE/200 GE access switches via 400 GE uplinks, scaling campus cores to cloud speeds. -
Data Center Interconnect (DCI)
Leverage 400 GE ports for metro and multi-site links, ensuring high-throughput DCI with minimal hops. -
Carrier & Cloud-Edge PoPs
Act as a high-density Spine Switch in edge PoPs, supporting diverse 100 GE and 400 GE service fabrics.
Deployment & Management Experience
-
Zero-Touch Provisioning
Auto-provision via Ruijie INC/WIS—templates applied at first boot for rapid scale-out. -
In-Service Upgrades
Dual firmware banks and VSU allow online software upgrades without traffic interruption. -
AI-Driven Telemetry
Real-time visibility into RoCE metrics, congestion, and endpoint topology—simplifying O&M. -
Modular Maintainability
Front-to-rear airflow, tool-free module replacement, and intelligent fan control minimize data-center footprint.
CLI Configuration Examples
Commands validated against the RGOS 12.X Configuration Guide:
# 1. Secure Management
enable
configure terminal
enable service ssh-server
crypto key generate rsa size 2048
enable service https-server
# 2. VSU Virtual Stacking
vsu enable
vsu domain 99
# 3. Activate 400GE Access Ports
interface range hundredGigabitEthernet0/1-128
no shutdown
# 4. Configure 10GE Management Ports
interface gigabitEthernet0/1
ip address 10.0.0.1 255.255.255.0
# 5. Create 400GE Uplink Port-Channel
interface range fourHundredGigabitEthernet1/0/1-8
port-group 1 mode active
# 6. Enable Lossless Ethernet
priority-flow-control enable
ecn enable
# 7. VLAN & Layer-3 Interface
vlan 990
interface vlan 990
ip address 192.168.99.1 255.255.255.0
ip route-static 0.0.0.0 0.0.0.0 192.168.99.254
# 8. Multitenant Overlay (VXLAN)
vxlan enable
evpn enable
FAQ – Expert Answers
Q1: What port speeds does the RG-S6990-128QC2XS support?
It offers 128× 400 GE QSFP112 and 2× 10 GE SFP+ for management and uplinks.
Q2: What is its switching capacity?
Delivers 102.4 Tbps non-blocking fabric with 21,000 Mpps forwarding.
Q3: How is packet loss prevented?
Leveraging RDMA, PFC, and ECN ensures lossless end-to-end transport under congestion.
Q4: Can it perform in-service software upgrades?
Yes—ISSU with dual-bank firmware and VSU failover enable zero-disruption updates.
Q5: Is it suitable as a cloud DC switch?
Absolutely—VXLAN/EVPN overlays, AI-Fabric telemetry, and high-density ports make it perfect for cloud dc switch roles.
Q6: What redundancy mechanisms exist?
2+2 PSUs, 4+1 fans, hot-swap line cards, and sub-200 ms VSU convergence guarantee high availability.
Q7: What management interfaces are available?
Supports CLI, Web GUI, SNMP v3, NETCONF, RESTful APIs, console, MGMT RJ45, and USB.
Q8: How does AI-Fabric enhance O&M?
Automated ECN tuning, real-time congestion analytics, and endpoint visualization streamline operations.
Conclusion
The Ruijie S6990 Switch (RG-S6990-128QC2XS) stands as the pinnacle 400GE Switch, merging 128× 400 GE ports, 102.4 Tbps capacity, and AI-driven management.
As a Data Center Switch, cloud dc switch, and Spine Switch, it delivers future-proof performance and rock-solid reliability for the most demanding network environments.
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