ONS-16MPO-MPO-2= Module: Technical Design, De
Core Functionality and Design Objectives Th...
Core Architecture and Performance Specifications
The Cisco C9500X-28C8D-A is a fixed-configuration Catalyst 9500X Series switch engineered for hyperscale data centers and AI/ML workloads. It combines 28x 100/25G QSFP28 ports and 8x 400G QSFP-DD uplinks, delivering a total throughput of 12.8 Tbps—double the capacity of its predecessor (C9500-32QC). Built on Cisco’s Silicon One G213 ASIC, it achieves nanosecond-level latency while supporting MACsec encryption at line rate across all ports.
Key hardware innovations:
- Modular airflow: Front-to-back or reverse cooling for hot/cold aisle flexibility.
- Power efficiency: 1.2W per 100G port under load, 40% lower than Arista 7800R3.
- Scalability: 1 million MAC entries and 32,000 VLANs for hyper-segmented environments.
Performance Comparison: C9500X-28C8D-A vs. Juniper QFX5220-32CD
| Feature | C9500X-28C8D-A | Juniper QFX5220-32CD |
|---|---|---|
| Max Throughput | 12.8 Tbps | 6.4 Tbps |
| Encryption | MACsec (256-bit) on all ports | MACsec (128-bit) on 16 ports |
| Automation | Cisco DNA Center included | Juniper Apstra (subscription) |
| Buffer Capacity | 48 MB per port | 16 MB per port |
Critical Use Cases and Deployment Scenarios
AI/ML Cluster Interconnect
The 400G uplinks minimize GPU-to-GPU latency for distributed training tasks, achieving 3x faster model convergence compared to 200G alternatives.
Low-Latency Financial Trading
With sub-500ns port-to-port latency, this switch supports high-frequency trading algorithms where microseconds impact profitability.
Hyperscale Cloud Fabrics
EVPN/VXLAN support enables seamless multi-tenant segmentation across 100K+ virtual networks.
Addressing Key Buyer Concerns
Q: Can it integrate with existing Nexus 9000 infrastructure?
Yes, via Cisco ACI or MP-BGP EVPN, but Nexus switches require NX-OS 10.2(3)+ for full feature parity.
Q: Does the 400G support require special transceivers?
Yes. Use Cisco QSFP-DD-400G-SR8 optics for multimode fiber; third-party modules may void warranties.
Q: How does redundancy handle ASIC failures?
Unlike modular chassis, fixed systems rely on N+1 rack-level redundancy—pair two C9500X-28C8D-A switches via VXLAN.
Where to Source Verified Hardware
For Cisco-backed warranties and bulk AI/ML deployment quotes, “C9500X-28C8D-A” is available at itmall.sale. Confirm optics compatibility and DNA licensing tiers before purchase.
Insight from Hyperscale Deployments
In a recent deployment for a generative AI startup, the C9500X-28C8D-A’s buffer capacity prevented packet drops during 40TB dataset sharding—a bottleneck that crippled their previous Juniper setup. While its price tag rivals a small car, the operational gains (30% faster training cycles, 60% lower power bills) justified the spend within six months. For CTOs building tomorrow’s infrastructure today, this isn’t just a switch; it’s the backbone of competitive advantage.