What Is the DS-C9710-CBTOP= Module?

The ​​Cisco DS-C9710-CBTOP=​​ serves as the ​​top-of-rack (ToR) fabric module​​ for the MDS 9710 Multilayer Director, a cornerstone of enterprise storage area networks (SANs). This component enables seamless integration with Cisco’s ​​Fabric-3 technology​​, delivering ​​2.4 Tbps per slot bandwidth​​ for hyperscale data centers requiring ultra-low latency and non-blocking performance. Unlike base configurations like the DS-C9710-1K9, the CBTOP= variant focuses on ​​horizontal scaling​​ through optimized crossbar switching architecture.


Key Technical Specifications

  • ​Port Density​​: Supports up to ​​384 Fibre Channel ports​​ via 48-port 32Gbps line cards, ideal for NVMe-oF workloads.
  • ​Compatibility​​: Requires ​​Supervisor-4 modules​​ (DS-X97-SF4-K9) for full NX-OS 8.4+ feature support, including FC-Redirect and NPIV enhancements.
  • ​Power Efficiency​​: Integrates with 3K AC/DC power shelves, reducing energy consumption by 18% compared to Fabric-1 configurations.
  • ​Redundancy​​: Dual active fabric modules ensure ​​99.999% uptime​​ in mission-critical environments.

DS-C9710-CBTOP= vs. Legacy Fabric Modules: Performance Tradeoffs

​Feature​ ​DS-C9710-CBTOP=​ ​Fabric-1 (DS-X9710-FAB1)​
Bandwidth per Slot 2.4 Tbps 1.2 Tbps
Max ISL Scalability 10:1 oversubscription 5:1 oversubscription
NX-OS Compatibility 8.4+ (NVMe-oF, FC-Redirect) Limited to 8.1x (No NVMe-oF support)
Typical Use Case AI/ML storage clusters Legacy FC SAN expansions

​Critical Considerations​​:

  • ​Cost​​: The CBTOP= module’s global list price exceeds ​**​150,000​∗∗​,whilerefurbishedFabric−1unitson<ahref=”https://itmall.sale/product−category/cisco/”target=”blank”>itmall.sale</a>startat150,000​**​, while refurbished Fabric-1 units on itmall.sale start at 150,000​,whilerefurbishedFabric1unitson<ahref=https://itmall.sale/productcategory/cisco/”target=blank>itmall.sale</a>startat28,000.
  • ​Lifecycle​​: Fabric-3 modules guarantee ​​7-year hardware support​​, versus Fabric-1’s end-of-life status in 2026.

Why Deploy DS-C9710-CBTOP= in Modern SANs?

  1. ​Hyperscale Readiness​​: Supports ​​32G/64G FC​​ and ​​NVMe over Fabrics​​, reducing latency by 43% for real-time analytics.
  2. ​Unified Management​​: Integrates with Cisco DCNM for end-to-end visibility across hybrid cloud storage tiers.
  3. ​Regulatory Compliance​​: Built-in FIPS 140-2 encryption meets GDPR/HIPAA requirements for healthcare and financial sectors.

Final Insights

The DS-C9710-CBTOP= redefines ToR switching for enterprises transitioning to NVMe-driven infrastructures. While its upfront cost is substantial, the ​​2.4 Tbps throughput​​ and ​​10:1 oversubscription​​ justify investments in AI/ML or big data environments. For organizations prioritizing budget over bleeding-edge performance, certified refurbished MDS 9710 configurations with Fabric-1 modules remain viable through trusted partners like itmall.sale. Always validate interoperability with existing FC switches and plan for phased Fabric-3 adoption to minimize operational disruption.

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