The Cisco ASR-914-F2B-FAN is a Top/Bottom Airflow Deflector Fan Tray Kit designed specifically for the Cisco ASR 914 Router within the ASR 900 Series Aggregation Services Routers. This full-featured, modular aggregation platform delivers cost-effective converged mobile, residential, and business services with redundancy, shallow depth, low power consumption, and high service scale optimized for small aggregation and remote Point-of-Presence (POP) applications.
Key Role in High Availability
- The ASR 900 Series routers, including the ASR 914, feature a single fan tray slot that must be populated for system operation. The fan tray contains redundant fans, ensuring continued operation on a single fan failure.
- Systems remain operational during fan tray replacement, with a hard time limit on reinsertion based on ambient temperature.
- In addition to cooling the chassis, the fan tray includes a connector for dry-contact inputs and several system-level alarm LEDs.
- For ASR 907/914 Routers, the fan tray supports enhanced models like A907-FAN-E with optional field-serviceable dust filter.
Flexible Deployment and Modularity
The ASR 914 Router shares design principles with the ASR 907, offering 16 interface module slots, 2 RSP slots, and up to 3 power supply slots. The fan tray contributes to the platform’s modularity, with all components being field-replaceable. Ethernet interfaces range from 10 Mbps to 100 Gbps, and legacy interfaces from nxDS0 to OC-12/STM-4 for PDH, SDH, and SONET.
Side-to-side airflow design (inlet on the right side, outlet on the left side when viewed from the front) allows back-to-back mounting of two ASR 900 Series routers in a 600-mm cabinet. The Top/Bottom Airflow Deflector enables airflow optimization for specific cabinet configurations. Extended temperature range qualification supports deployment in small and rugged environments with minimal environmental control.
Broadband, Mobile, and Metro Ethernet Applications
- Broadband Aggregation: Supports thousands of subscribers with advanced QoS, hierarchical three-level algorithms, IPTV, Video on Demand (VoD), and Cisco Evolved Programmable Network architecture.
- Mobile Preaggregation: Aggregates cell sites with MPLS transport for RAN backhaul, integrated BITS, 10 MHz, 1PPS, TOD interfaces, SyncE, IEEE-1588, and network clocking for TDM, SDH, SONET, and GPS.
- Metro Ethernet: Meets Carrier Ethernet requirements with Layer 2, IP, and MPLS for L2VPN, L3VPN, and multicast services in remote central offices.
Operational Efficiency and Diagnostics
The fan tray integrates with proactive diagnostic tools like Generic Online Diagnostics (GOLD) to avoid issues, troubleshoot, and implement solutions. The ASR 900 Series supports In-Service Software Upgrade (ISSU) with paired RSPs for software redundancy. Cisco IOS XE S Software provides modular packaging, feature velocity, and resiliency. Cisco Prime for Evolved Programmable Networks centralizes service design, fulfillment, assurance, and performance analysis.
Physical and Environmental Integration
The ASR 914 Router chassis (aligned with ASR 907) measures Height: 12.22 in. (310.38 mm) – 7RU, Width: 17.44 in. (443 mm), Depth: 9.22 in. (234.2 mm). Fan tray ensures cooling for configurations with high-throughput interface modules. Dust filters on enhanced fan trays (e.g., A907-FAN-E) reduce cooling capacity slightly, affecting temperature range with high-capacity modules like RSP3C.
Power supplies (AC/DC) operate in load-share mode, support single-supply operation, and mixing of AC/DC. Route Switch Processors (RSPs) handle data-plane, network-timing, and control-plane functions. Interface modules vary by RSP and chassis combination.