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Review Summary
CAB-DAC30M-SFP28, CAB-DAC15M-SFP28, TRX-25GSFP28-SR
NVIDIA Mellanox ConnectX-6 Lx
2x SFP28
SFP28
PCIe Gen4 x8
25Gbps/10Gbps
IEEE 802.3ae 10 Gigabit Ethernet
25/50 Ethernet Consortium 25G and 50G supporting all FEC modes
IEEE 802.3by 25G supporting all FEC modes
IEEE 802.3ad, 802.1AX Link Aggregation
IEEE 802.3az Energy Efficient Ethernet (supports only "Fast-Wake" mode)
IEEE 802.3ap based auto-negotiation and KR startup
IEEE 802.1Q, 802.1P VLAN tags and priority
IEEE 802.1Qaz (ETS)
Yes
Low-profile bracket pre-installed; full-height and specialized (for selected QNAP NAS) brackets are bundled
Yes
Yes
Yes
Yes
512
8
QTS/QuTS hero (recommend an upgrade to the latest version)
Models with PCIe slot(s) (1 free slot required)
Ubuntu 20.04
driver: mlx5_core, version: 5.15.0-97-generic
Ubuntu 22.04
driver: mlx5_core, version: 6.5.0-35-generic
Windows 8/10
Windows Server 2016/2019
SFP28 DAC cable (3M) or SFP28 OPTIC transceiver
4.6" (117.3mm)
885022021260
Supports SR-IOV and RoCE for Improved Network and VMware Virtualization Environments
The QXG-25G2SF-CX6 features an NVIDIA Mellanox ConnectX-6 Lx SmartNIC controller, supports PCIe Gen4 (backwards compatible with Gen3/ Gen2) and provides up to 25 Gbps transfer speeds (supports 10/25Gbps). By using Port Trunking to combine multiple ports, up to 50GbE can be achieved for accelerating file sharing and intensive data transfer. With SR-IOV support, the QXG-25G2SF-CX6 greatly boosts network efficiency and is ideal for I/O-intensive and latency-sensitive virtualization applications and data centers.
High-speed 25GbE Networking
The TS-h3088XU-RP supports 25GbE networking, and can be used with the QXG-25G2SF-CX6 to expand network connectivity. It can also be used with a 25GbE Switch to build a budget-friendly high-speed network environment.
Strengthen Your virtualization Environment with SR-IOV and RoCE
The QXG-25G2SF-CX6 supports SR-IOV, which can allocate bandwidth resources from a physical network card directly to VMs. It ensures reliable VM applications and reduced CPU overheads. The QXG-25G2SF-CX6 also supports RoCE, which can access a network directly in RAM to effectively reduce latency and enhance performance and efficiency for VMware virtualization environments.
Ensure reliable data transfer with Forward Error Correction (FEC)
The QXG-25G2SF-CX6 supports FEC to overcome packet loss - a potentially common occurrence in fast, long-distance networks. FEC helps the receiving side detect and recover lost data to correct bit errors, thus ensuring reliable data transmission over "noisy" communication channels. With three FEC modes, you can use a suitable cable and switch to build an optimal network environment.
Supports Windows and Linux servers/workstations
Besides QNAP devices, the QXG-25G2SF-CX6 supports many platforms, including Windows 10, Windows Server, and Linux (driver required) which allows you to attain optimal business performance for a wider range of system applications and services. The higher bandwidth density with reduced links helps reduce cabling footprint and operational costs.
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