Cisco UCS-L-6400-25G= 25Gbps Expansion Module
Introduction to the UCS-L-6400-25G= Module ...
Overview of the CB-M12-M12-MMF1.5= Module
The CB-M12-M12-MMF1.5= is a high-density Cisco multimode fiber (MMF) breakout module engineered for environments requiring clustered, short-reach connectivity. Designed with 12x MMF LC ports and a 1.5-meter reach, it simplifies cabling in space-constrained racks while supporting 10G/25G Ethernet speeds.
Technical Specifications and Key Features
- Fiber Type: OM3/OM4 multimode, optimized for 850nm wavelength.
- Port Configuration: 12x LC duplex interfaces (M12-M12 terminations).
- Reach: 1.5 meters (ideal for intra-rack or adjacent rack links).
- Data Rates: Supports 10G, 25G, and 40G (via breakout configurations).
- Compatibility: Certified for Cisco Nexus 9000 and Catalyst 9500 series switches.
Primary Use Cases and Deployment Benefits
- Hyperscale Data Centers: Reduces cable clutter in spine-leaf topologies with high port density.
- Financial Trading Systems: Delivers low-latency, high-throughput connectivity for time-sensitive applications.
- Modular Deployments: Hot-swappable design enables quick upgrades without service interruptions.
Critical Compatibility Checks Before Installation
- Switch Firmware: Ensure IOS-XE or NX-OS versions support the module (Cisco’s compatibility matrix is essential).
- Cable Quality: Use OM3/OM4 cables to avoid attenuation issues at 25G/40G speeds.
- Power Draw: Verify switch power budgets for multi-module deployments.
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Performance Comparison: CB-M12-M12-MMF1.5= vs. Generic Alternatives
| Feature | CB-M12-M12-MMF1.5= | Third-Party MMF Module |
|---|---|---|
| Port Density | 12 LC ports | 4-8 ports |
| Cisco Firmware Integration | Full support | Partial/untested |
| Warranty Coverage | Cisco lifetime | 90 days (limited) |
Final Insights: A Network Engineer’s Take
The CB-M12-M12-MMF1.5= addresses a niche but critical need for dense, reliable fiber connectivity in performance-driven setups. While generic modules may seem cost-effective initially, their lack of firmware integration and support often leads to costly downtime. For enterprises prioritizing scalability and uptime, sticking with Cisco-certified hardware isn’t optional—it’s strategic.