Add-on Card AOC-MH25G-m2S2T / AOC-MH25G-m2S2TM
Products Accessories [ AOC-MH25G-m2S2T (for Storage Systems) / AOC-MH25G-m2S2TM (for Twin Systems) ]
Add-on Card

Advanced 25GbE Controller Super I/O Module (SIOM)

The Supermicro AOC-MH25G-m2S2T is one of the most feature rich 25GbE controllers in the market. Based on the Mellanox® ConnectX-4 Lx EN with features such as VXLAN and NVGRE; it provides flexible connectivity for different networking requirements. It is compatible with 10GbE networks and offers the most cost effective upgrades from 10GbE to 25GbE in Data Center and Cloud deployments.

The AOC-MH25G-m2S2T also supports an additional 2-ports of 10GbE RJ45 connectivity, based on the Intel® X550 controller, providing NC-SI for Remote Management. This versatile 25GbE controller is an excellent choice to enhance data center network connectivity when high speed throughput is required.

This product is only available through Supermicro.
Key Features

• Super I/O Module (SIOM) Form Factor
• Mellanox® ConnectX-4 Lx EN 25GbE controller Dual SFP28
• Intel® X550-AT2 10GbE controller, Dual RJ45 Connectors
• Hardware offloads for NVGRE, VXLAN and GENEVE
encapsulated traffic
• SR-IOV for virtualization
• Low latency RDMA over Converged Ethernet(RoCE)
(25GbE Controller only)
• Jumbo Frames Support
• NC-SI for Remote Management (10GbE Controller only)
• Asset Management Features with thermal sensor
• RoHS compliant 6/6
Controller Specifications


   - Super I/O Module (SIOM) Form Factor
   - Mellanox® ConnectX-4 Lx EN 25GbE controller
     • Dual SFP28 connectors with speed up to 25Gbps per port
   - Intel® X550-AT2 10GbE 10GBase-T controller
     • Dual RJ45 connectors with speed up to 10Gbps per port

Cables Support:

   - 25GbE SFP28: Direct attach copper cables and Fiber-optic
     cables (with required optional transceivers)
   - 10GbE RJ45: RJ-45 Category-6 up to 55m; Category-6A up to

Power Consumption:

   - Maximum 25W

Operating Conditions

   - Operating temperature: 0°C to 55°C
     (32°F to 131°F)
   - Storage temperature: -40°C to 70°C
     (-40°F to 158°F)
   - Storage humidity: 90% non-condensing relative
     humidity at 35°C

Physical Dimensions

   - Card PCB dimensions: 92mm (3.62in) x 87.1mm
     (3.43in) (W x D)

Supported Platforms:

   - Supermicro® motherboards with SIOM slot
   - Supermicro® server systems with SIOM slot

Please note that this product is sold only as part of an integrated solution with Supermicro server systems

  • RoHS Compliant 6/6, Pb Free

25GbE SFP28 Specifications


   - 25GbE / 10GbE / 1GbE
   - IEEE 802.3ad, 802.1AX Link Aggregation
   - IEEE 802.1Q, 802.1P VLAN tags and priority
   - IEEE 1588v2
   - Jumbo frames support (9.6KB)

Enhanced Features:

   - Hardware-based reliable transport
   - Collective operations offloads
   - Vector collective operations offloads
   - 64/66 encoding
   - Dynamically Connected transport (DCT)
   - Enhanced Atomic operations
   - Support for MSI/MSI-X mechanisms

Storage Offloads:

   - RAID offload - erasure coding (Reed-Solomon) offload

CPU Offload Features:

   - RDMA over Converged Ethernet (RoCE)
   - TCP/UDP/IP stateless offload
   - LSO, LRO, checksum offload
   - RSS (can be done on encapsulated packet), TSS,
     HDS, VLAN insertion/stripping, Receive flow
   - Intelligent interrupt coalescence

Overlay Networks:

   - Stateless offloads for overlay networks and tunneling protocols
   - Hardware offload of encapsulation and decapsulation of NVGRE
     and VXLAN overlay networks

Hardware-Based I/O Virtualization:

   - Single Root IOV
   - Multi-function per port
   - Multiple queues per virtual machine
   - VMware NetQueue support


   - SR-IOV: Up to 256 Virtual Functions
   - SR-IOV: Up to 16 Physical Functions per port

Management Features:

   - Remote boot over iSCSI
   - PXE and UEFI

OS Support:

   - RHEL/CentOS
   - Windows
   - FreeBSD
   - VMware

10GbE RJ45 Specifications

I/O Features:

   - MXI-X Support
   - Intel Flow Director
   - Low Latency
   - Multiple Queues - 64 Tx and Rx per Port
   - Tx/Rx IP, SCTP, TCP, and UDP Checksum
     Offloading (IPv4, IPv6) Capabilities
   - Tx TCP Segmentation Offload (IPv4, IPv6)

Network Features:

   - Jumbo frames up to 15.5KB
   - IEEE 802.3az Energy Efficient Ethernet (EEE)

Virtualization Features:

   - Multi-mode I/O Virtualization Operations
   - VXLAN Stateless Offloads
   - NVGRE Stateless Offloads
   - Virtual Machine Device Queues (VMDq)
   - 64 Transmit (Tx) and Receive (Rx) Queue Pairs Per Port
   - FPP - 64 VFs Per Port
   - Support for PCI-SIG SR-IOV Specification
   - IEEE 802.1Q VLAN Support

Management Features:

   - Preboot eXecution Environment (PXE) support
   - iSCSI Remote Boot Support and FCoE
   - NC-SI for remote management

OS Support:

   - Linux RHEL, Linux SLES
   - Windows
   - FreeBSD
   - VMware
User's Guide [ Download ]
Datasheet [ Download ]
Driver Choose the latest CDR-NIC folder, and then click on Intel & Mellanox folder for driver [ Download ]
Driver CD Click on the latest CDR-NIC ISO file to download [ Download ]
Compatibility Matrices
Supermicro Servers with SIOM support
Cables & Transceivers
Networking Cables & Transceivers
Top of rack Switch SSE-F3548S / SSE-F3548SR (54 ports)

Available SKUs
SKUs Bracket Included Description
AOC-MH25G-m2S2T BKT-0112L 2-port 25 Gigabit & 2-port 10 Gigabit Ethernet Adapter with a swappable bracket for 2U+ chassis (Storage Servers)
AOC-MH25G-m2S2TM BKT-0113L 2-port 25 Gigabit & 2-port 10 Gigabit Ethernet Adapter with an internal bracket for 1U chassis (Twin Servers)

Optional Parts List
Part Number Qty Description
SFP28 Copper Cable CBL-NTWK-0944-MS28C05M - 0.5m 25GbE SFP28 to SFP28, Passive
SFP28 Copper Cable CBL-NTWK-0944-MS28C10M - 1m 25GbE SFP28 to SFP28, Passive
SFP28 Copper Cable CBL-NTWK-0944-MS28C15M - 1.5m 25GbE SFP28 to SFP28, Passive
SFP28 Copper Cable CBL-NTWK-0944-MS28C20M - 2m 25GbE SFP28 to SFP28, Passive
SFP28 Copper Cable CBL-NTWK-0944-MS28C25M - 2.5m 25GbE SFP28 to SFP28, Passive
SFP28 Copper Cable CBL-NTWK-0944-MS28C30M - 3m 25GbE SFP28 to SFP28, Passive
SFP28 Active Optical Cable CBL-SFP28AOC-7M-EM - 7m 25GbE SFP28 Active Optical Cable, Active, Pull
SFP28 Active Optical Cable CBL-SFP28AOC-10M-EM - 10m 25GbE SFP28 Active Optical Cable, Active, Pull
SFP28 Transceiver Module AOM-SFP28-25GbE-SR-1-MLN - SFP28 Transceiver module 25G, 850nm, MMF, LC
Information in this document is subject to change without notice.
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