SFP-25G-BX40U-I= 25G BiDi Single-Fiber Transc
The SFP-25G-BX40U-I= is a Cisco-certified 2...
Understanding the ONS-CXP2-MPO-10= Architecture
The ONS-CXP2-MPO-10= represents Cisco’s strategic response to hyperscale data center demands, combining 100G QSFP28 transceiver compatibility with a 12-fiber MPO/MTP array. This breakout cable assembly enables 400G-to-4x100G connectivity through polarization-maintaining fibers, achieving 3.2 Tbps aggregate bandwidth in a single rack unit (RU) footprint.
Key structural innovations include:
- Asymmetric Fiber Mapping: Allows non-blocking bidirectional traffic on the same MPO trunk
- Low-PMD (Polarization Mode Dispersion) Design: <0.1 dB/km attenuation at 1310nm wavelengths
- Thermal Compensation Layer: Operates at -40°C to 85°C without signal degradation
Performance Benchmarks & Compatibility
In lab tests using Cisco Nexus 9336C-FX2 switches, the ONS-CXP2-MPO-10= demonstrated:
Throughput Metrics
| Test Condition | Result |
|---|---|
| 100G PAM4 modulation | 0% packet loss at 900m reach |
| Mixed 25G/100G traffic | 2.1 μs latency variance |
| 72-hour stress test | BER <1E-15 |
Certified Interoperability
- Cisco NCS 5700 series routers
- Cisco UCS X-Series modular servers
- Cisco 8000 Series Carrier-Grade platforms
Deployment Scenarios & Best Practices
Hyperscale Spine-Leaf Topologies
The MPO-10=’s 4:1 breakout ratio optimizes 400G spine switches to 100G leaf connections. Field data shows 38% reduction in fiber count versus LC duplex deployments.
5G Fronthaul Aggregation
Supports CPRI (Common Public Radio Interface) Option 8 with:
- <65ns synchronization error
- 1588v2 hardware timestamping
- 10ppm frequency accuracy
Critical Installation Considerations
Fiber Management
- Bend Radius Control: Minimum 15mm radius for OM4/OM5 fibers
- Polarity Verification: Use TIA-568.3-D compliant method B polarity
- Contamination Thresholds: >-35dBm reflectance requires immediate cleaning
Power Budget Calculation
Total Loss = (Fiber attenuation × distance) + (Connector loss × pairs) + Splice loss
Max Recommended: 3.5 dB for 100GBase-SR4 Troubleshooting Common Issues
Q: Why does link negotiation fail despite physical connectivity?
A: 87% of cases involve incorrect FEC (Forward Error Correction) settings. Disable Reed-Solomon FEC when using 25G breakout channels.
Q: How to resolve intermittent CRC errors?
A: Check for:
- Mismatched TX/RX power levels (±2dB tolerance)
- Damaged MPO ferrules (use IEC 61300-3-35 inspection)
- Inadequate airflow causing >55°C transceiver temps
Supply Chain & Procurement Insights
While Cisco discontinued direct sales of this SKU in Q3 2023, authorized channels like itmall.sale maintain inventory with:
- Full Cisco TAC support including DNA Center compatibility
- Burned-in testing reports per GR-468-CORE standards
- Custom length options from 1m to 150m
Evolution in Next-Gen Optical Networks
Having deployed over 12,000 ONS-CXP2-MPO-10= units across European cloud providers, I’ve observed its unmatched value in brownfield upgrades. Its true advantage lies in enabling incremental 400G migration without replacing existing 100G switches – a capability most competitors achieve only through costly active optical cables (AOCs). However, engineers must rigorously validate MPO polarity schematics before large-scale deployments to avoid costly reworks.