Supermicro AOC-SGP-I4 - 4-port GbE card based on Intel i350

Supermicro AOC‑SGP‑I4: 4‑Port Gigabit Ethernet Card Based on Intel i350

The Supermicro AOC‑SGP‑I4 is a high‑performance, internally mounted network adapter that delivers four independent Gigabit Ethernet ports in a single PCI Express x4 slot. Built around the renowned Intel i350 controller, this card combines robust hardware design with comprehensive software support to meet demanding server and workstation networking needs.

Key Technical Specifications

• Host Interface: PCI Express x4 (PCIe 2.1)
• Port Count: Four independent RJ‑45 ports
• Data Rates: 10/100/1000 Mbps per port, with full duplex operation
• Cabling Technology: 10/100/1000BaseT(X)
• Physical Dimensions: Height 63.5 mm; Depth 99.1 mm
• Weight: Approximately 0.20 kg (shipping weight)
• RoHS Compliant: Yes – meets European hazardous‑materials regulations
• LED Indicators: Dedicated LAN activity LEDs for each port
• Flow Control Support: Yes, IEEE 802.3x flow control for collision avoidance
• Jumbo Frame Support: Yes – configurable MTU up to 9 Kbytes
• Operating System Compatibility: Windows (XP, Vista, 7, 8), Linux distributions (RedHat EL 5.5/6.0, SuSe SLES 10 SP3/11 SP1), FreeBSD 8.0, VMware ESX 4.0/4.1/5.0, Xen
• Networking Standards: IEEE 802.1Q VLAN tagging, IEEE 802.3 (including ab, az, u, x, z variants), IPv4 and IPv6 support via TCP/UDP protocols

Design & Build Quality

The card’s internal layout is engineered for optimal signal integrity. Each of the four ports is wired to its own dedicated Ethernet PHY, ensuring that traffic on one port does not interfere with another. The Intel i350 controller provides low latency and high throughput, making it suitable for virtualization environments, storage area networks (SANs), and high‑availability clusters.

With a compact footprint of 63.5 mm in height and 99.1 mm in depth, the AOC‑SGP‑I4 fits comfortably into standard server chassis without compromising airflow or requiring additional cooling solutions. The robust metal backplate and secure mounting screws guarantee long‑term stability even under heavy load.

Software & Driver Ecosystem

Supermicro supplies a comprehensive suite of drivers and utilities that are pre‑bundled with the card for major operating systems:

• Linux: Kernel modules compatible with RedHat Enterprise Linux 5.5/6.0 and SuSe SLES 10 SP3/11 SP1, enabling seamless integration into existing data‑center stacks.
• FreeBSD: Native driver support for FreeBSD 8.0, allowing high‑performance networking on BSD platforms.
• VMware ESX: Dedicated drivers for VMware ESX 4.0/4.1/5.0, ensuring that virtual machines can leverage the full bandwidth of each port without host bottlenecks.
• Xen: Xen hypervisor support, facilitating efficient passthrough and network isolation in virtualized environments.

The driver package includes utilities for configuring VLANs, enabling jumbo frames, monitoring link status, and adjusting flow‑control settings. These tools are command‑line based, providing administrators with granular control over each port’s behavior.

Performance & Reliability Features

• Full Duplex Operation: Each port can simultaneously transmit and receive data at 1 Gbps, maximizing throughput for high‑bandwidth applications such as database replication or media streaming.
• IEEE 802.3x Flow Control: Prevents packet loss during congestion by allowing the receiver to pause transmission until buffer space is available.
• Jumbo Frames: Reduces CPU overhead for large data transfers, improving efficiency in storage and virtualization workloads.
• Redundancy & Failover: With four independent ports, administrators can configure link aggregation (LACP) or failover pairs to maintain connectivity during port or cable failures.

Typical Use Cases

The Supermicro AOC‑SGP‑I4 is ideal for environments that demand:

• High Availability: Dual or quad network paths to ensure continuous service during hardware or cable faults.
• Virtualization Platforms: VMware ESX, Xen, and Hyper‑V hosts requiring multiple virtual switches with dedicated physical uplinks.
• Storage Networks: SANs that benefit from separate management, data, and replication traffic streams.
• Enterprise Workstations: Servers or workstations that need robust LAN connectivity for file sharing, remote desktop, and cloud services.

Installation & Configuration Guide

1. Physical Installation: Insert the card into an available PCI Express x4 slot. Secure it with the provided screws and connect four RJ‑45 cables to the external ports.
2. Driver Deployment: Load the appropriate driver module for your operating system (e.g., modprobe i350 on Linux). Verify that all four interfaces appear as eth0 through eth3.
3. Network Configuration: Assign IP addresses, configure VLAN tags if needed, and enable jumbo frames via the driver utilities or system network manager.
4. Monitoring: Use standard tools such as ethtool, ifconfig, or VMware’s vSphere client to monitor link status, speed, duplex mode, and error counters.
5. Testing: Run throughput tests (e.g., using iperf) on each port individually and in parallel to confirm that the card delivers the advertised 1 Gbps performance.

Conclusion

The Supermicro AOC‑SGP‑I4 stands out as a versatile, high‑performance networking solution for servers and workstations that require multiple Gigabit Ethernet connections. Its combination of Intel’s proven i350 controller, comprehensive OS support, robust physical design, and advanced features such as flow control and jumbo frames make it an excellent choice for data centers, virtualization hosts, and enterprise computing environments.