Fiber Channel Card Design Parameter Table
Fiber Channel cards are designed according to ANSI standards, supporting multiple speeds, SFP types, and PCIe interfaces, with configuration parameters defined for interoperability and performance.
Key Design Parameters
| Parameter | Description | Notes / Recommendations |
|---|---|---|
| Standards Compliance | ANSI X3T11 Fibre Channel | Ensures interoperability with storage arrays and SAN devices; FCSI Profiles guide implementation |
| Supported Speeds | 2 Gbps, 4 Gbps, 8 Gbps, 10 Gbps, 16 Gbps, 25 Gbps, 32 Gbps | Speed support depends on card model and SFP type; e.g., Cisco MDS 9700 supports 32/16/8/4 Gbps on 32-Gbps SFPs |
| SFP / Transceiver Types | SFP, SFP+, SFP28, QSFP28 | Single-mode fiber (SMF/OS2) for long distances, multimode fiber (MMF/OM3/OM4) for short distances; DAC for ≤7 m, AOC for 3–30 m |
| PCIe Interface | PCIe 3.0 ×4, ×8; PCIe 4.0 ×4, ×8; PCIe 5.0 | Bandwidth must match card speed; 10G NICs usually fine with PCIe 3.0 ×4, 100G NICs require PCIe 3.0 ×8 or PCIe 4.0 ×4 |
| Fiber Channel Classes | Class 2, Class 3 | Defines flow control and delivery guarantees; supported by most enterprise cards |
| Error Handling | Forward Error Correction (FEC), BB_credits | FEC allows error correction without retransmission; BB_credits manage buffer-to-buffer flow control |
| Form Factor | Full-height, low-profile | Depends on server chassis and cooling requirements |
| Power & Cooling | Dual-port cards may require enhanced airflow | High-performance cards can run hot; heatsinks and airflow are critical |
| Configuration Parameters | Port speed, rate mode, auto-negotiation | Changing speed or rate mode may disrupt traffic; auto parameter enables autosensing |
| Interoperability | FCSI Profiles, ANSI standards | Profiles specify selected physical, link-level, and upper-level protocol options for reliable integration |
Additional Notes
- Installation: Fiber Channel cards connect via PCIe slots; ensure proper driver and firmware installation for OS recognition and SAN connectivity .
- Distance Considerations: SMF for long distances (km), MMF for short distances (<500 m), DAC for very short connections, AOC for flexible medium distances .
- Performance Tuning: Allocate shared resources (BB_credits) carefully when multiple interfaces are in use; modifying FEC or port speed may temporarily disrupt traffic . This table provides a comprehensive overview of design parameters for Fiber Channel cards, suitable for system architects, SAN engineers, and hardware designers planning high-performance storage networks.
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