Add-on Card AOC-MH25G-b2S2G/AOC-MH25G-b2S2GM
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Add-on Card

Advanced 25GbE Ethernet Controller in Supermicro Super I/O Module

The Supermicro® AOC-MH25G-b2S2G is one of the most feature rich and low power consumption 25GbE controllers in the market. With 2-ports of 25GbE SFP28 connectivity in small form factor SIOM and based on the Broadcom® BCM57414 with features such as VXLAN, NVGRE, RoCE also NIC Partitioning, it provides unparalleled density, performance, and functionality. It also supports additional 2-ports GbE RJ45, based on Intel® i350, providing NC-SI side-band for IPMI Remote Management. AOC-MH25G-b2S2G is the most versatile 25GbE controller in the market and an excellent choice to enhance network connectivity in Data Centers and Enterprise environments.

This product is only available through Supermicro.
Key Features

• Super I/O Module (SIOM) Form Factor

• Broadcom® BCM57414 25GbE controller,

   Dual SFP28 connectors

• Intel® i350-AM2 GbE controller, Dual RJ45 Connectors

• RDMA over Converged Ethernet (RoCE) (25GbE Controller only)

• Network Virtualization: VXLAN and NVGRE

   (25GbE Controller only)

• NIC Partitioning (NPAR) (25GbE Controller only)

• Broadcom TruFlow (25GbE Controller only)


• IEEE 1588 Time Sync

• Jumbo Frames support

• NC-SI for IPMI Remote Management (GbE Controller only)

• Asset Management Features

• RoHS compliant 6/6

Controller Specifications


   - Super I/O Module (SIOM) Form Factor

   - Broadcom® BCM57414 25GbE controller

     • Dual SFP28 connectors with speed up to 25Gbps per port

   - Intel® i350-AM2 GbE controller

     • Dual RJ45 connectors with speed up to 1Gbps per port

Cables Support:

     - 25GbE SFP28: Direct attach copper cables and Fiber-optic

       cables (with required optional transceivers)

     - 10GbE RJ45: RJ-45 Category-5/5e up to 100m

Power Consumption:

     - Maximum 9W

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 Specifications

Networking Features

   - Jumbo frames

   - 802.3x flow control

   - Link Aggregation (802.3ad)

   - Virtual LANs- 802.1q VLAN tagging

   - Configurable Flow Acceleration

   - IEEE 1588 and Time Sync

Stateless Offload Features:

   - TCP, UDP, IPv4, IPv6 checksum offload

   - Large Send Offload

   - Receive Segment Coalescing

   - TCP Segmentation Offload

   - Large Receive Offload

   - Receive Side Scaling (RSS)

   - Transmit Side Scaling (TSS)

NIC Partitioning (NPAR):

   - 16 Physical Functions

   - QoS per partition

   - Partitioning control via sideband communication

   - Up to 64 MAC/VLAN filter per partition

   - Per partition statistics support

   - Stateless offloads configuration per partition

   - VEB/VEPA support

Virtualization Features:

   - NetQueue, VMQueue, and Multiqueue

   - Support for 128 Virtual Functions

   - VXLAN, NVGRE and Geneve

   - Edge Virtual Bridging (EVB)

RDMA over Converged Ethernet (RoCE):

   - RoCEv1 and RoCEv2

   - Data Center Bridging with RoCE

Flow Processing:

   - Exact/Wildcard Match Flow Lookup

   - VLAN insertion/deletion


   - Mirroring

Data Center Bridging:

   - Priority-based flow control (PFC; IEEE 802.1Qbb)

   - Enhanced transmission selection (ETS; IEEE 802.1Qau)

   - Quantized congestion Notification (QCN; IEEE 802.1Qau)

   - Data Center Bridging Capability eXchange

     (DCBX; IEEE 802.1Qaz)

   - 8 traffic classes per port; fully DCB compliant per 802.1Qbb

Power Savings:

   - ACPI compliant power management

   - PCI Express Active State Power Management (ASPM)

   - Ultra low-power mode

   - Pass-through Energy Efficient Ethernet (IEEE 802.3az-2010)

GbE Specifications

Ethernet Features:

   - IEEE 802.3 auto-negotiation for speed, duplex, and flow control

   - IEEE 802.3x and 802.3z compliant flow control support

   - Automatic cross-over detection function (MDI/MDI-X)

   - 1Gb/s Ethernet IEEE 802.3, 802.3u,802.3ab PHY

     specifications Compliant

   - IEEE 1588 protocol and 802.1AS implementation

Power Management and Efficiency:

   - Energy Efficient Ethernet (EEE)

   - DMA Coalescing reduces platform power consumption

   - Active State Power Management (ASPM) support

   - LAN disable function

   - MAC Power Management controls

   - Low Power Link Up - Link Speed Control

Virtualization Features:

   - PC-SIG SR-IOV support

   - VM to VM Packet forwarding (Packet Loopback)

   - Flexible Port Partitioning

   - IEEE 802.1q VLAN support

   - IEEE 802.1q advanced packet filtering

   - Jumbo Frames support

Performance Features:

   - TCP/UDP, IPv4 and IPv6 checksum offloads to improve

      CPU usage

   - Low Latency Interrupts

   - Tx TCP segmentation offload (IPv4, IPv6) increases throughput

      and lowers processor usage

   - Receive Side Scaling (RSS) for Windows environment,

      Scalable I/O for Intelligent interrupt generation

Management Features:

   - Preboot eXecution Environment (PXE) support

   - iSCSI Remote Boot Support

   - NC-SI for remote management

User's Guide [ Download ]
Datasheet [ Download ]
Driver Choose the latest CDR-NIC folder, and then click on the Broadcom 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-b2S2G BKT-0112L 2-port 25 Gigabit & 2-port 1 Gigabit Ethernet Adapter with a swappable bracket for 2U+ chassis (Storage Servers)
AOC-MH25G-b2S2GM BKT-0113L 2-port 25 Gigabit & 2-port 1 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 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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