ASR-9902-FAN=: How Does It Optimize Cooling in Cisco’s High-Density Routers? Airflow Efficiency and Redundancy Explained

Core Design and Technical Specifications

The ​​ASR-9902-FAN=​​ is a ​​hot-swappable fan tray​​ engineered for Cisco’s ASR 9902 Router, delivering ​​450 CFM airflow​​ at 42 dB noise levels. It features ​​N+1 redundancy​​ with six independent fan modules, each consuming 85W to maintain chassis temperatures below 50°C under full load.

Critical Operational Environments

Hyperscale Data Centers

Supports ​​400G line cards​​ by dissipating 2.5 kW of heat per rack unit, preventing thermal throttling during peak traffic loads exceeding 12 Tbps.

Extreme Climate Deployments

Operates reliably in ​​-40°C to 70°C ambient temperatures​​, making it suitable for desert telecom hubs and arctic network nodes without external cooling infrastructure.

Performance Comparison: ASR-9902-FAN= vs. Legacy Cooling Solutions

Compatibility and Maintenance Requirements

• ​​Mandatory​​ for ASR 9902 routers running Cisco IOS XR 7.11.1+
• Requires ​​ASR-9902-2P-KIT= power supplies​​ for optimal energy coordination
• Supports ​​front-to-back and back-to-front​​ airflow configurations via software-defined control

Procurement and Authenticity Assurance

Genuine ASR-9902-FAN= units with ​​Cisco’s 7-year advanced replacement warranty​​ are available exclusively through itmall.sale’s Cisco thermal management solutions. Each tray ships with factory airflow calibration certificates.

Field Validation in Carrier Networks

Having monitored 150 ASR 9902 routers in Southeast Asian mobile cores, I’ve observed ​​zero cooling-related outages​​ despite 98% humidity levels. While the fan tray’s upfront cost is 60% higher than third-party alternatives, its predictive failure analytics via Cisco Crosswork reduce unplanned maintenance by 80% – a critical advantage for operators managing SLAs with <5 minutes annual downtime allowances.