Broadcom Single-Port 100GbE QSFP56 PCI-Express 4.0 x16 OCP 3.0 Network Adapter – BCM957504-N1100G

Broadcom BCM957504-N1100G Single-Port 100GbE QSFP56 OCP 3.0 Network Adapter

The Broadcom BCM957504-N1100G is a single-port 100GbE QSFP56 OCP 3.0 network adapter built on the Broadcom P225P BCM57504 controller, delivering 100Gbps server connectivity via PCIe 4.0 x16 for cloud, hyperscale, and enterprise data center deployments requiring maximum bandwidth efficiency in OCP-compatible server platforms.

Key Features

• Single-port 100GbE QSFP56 for full 100Gbps server uplink bandwidth
• PCIe 4.0 x16 host interface for full non-blocking throughput
• OCP 3.0 small form factor for OCP-compliant server platforms
• RoCE v2 RDMA for ultra-low latency storage and HPC networking
• SR-IOV with up to 256 virtual functions for dense virtualized environments

Product Specifications

• Part Number: BCM957504-N1100G
• Manufacturer: Broadcom
• Controller: Broadcom BCM57504 (P225P)
• Ports: 1 x 100GbE QSFP56
• Interface: PCIe 4.0 x16
• Form Factor: OCP 3.0 (Small Form Factor)
• Total Bandwidth: 100Gbps full duplex

Interface Specifications

• Port Speed: 100GbE (also supports 25GbE, 50GbE, 10GbE)
• Host Interface: PCIe 4.0 x16
• RDMA: RoCE v2
• Virtualization: SR-IOV (up to 256 VFs)
• Offloads: TSO, LRO, RSS, checksum offload
• Flow Control: IEEE 802.3x, PFC, ECN

Use Cases

• Cloud and hyperscale server 100GbE uplink in OCP 3.0 open compute platforms
• NVMe-oF and RoCE-based storage networking at 100Gbps line rate
• High-density virtualization hosts requiring SR-IOV with 256 virtual functions
• AI/ML training cluster server interconnect requiring maximum Ethernet bandwidth

Compatibility

• Compatible with OCP 3.0 compliant server platforms supporting PCIe 4.0
• Supported by VMware ESXi, Windows Server 2019/2022, and Red Hat Enterprise Linux 8/9
• Works with 100GbE QSFP56 DAC cables, AOC cables, and optical transceivers
• Managed via Broadcom Linux driver package and BNXT tools

Frequently Asked Questions

What is the difference between OCP 3.0 and a standard PCIe NIC?

OCP 3.0 (Open Compute Project) adapters use a standardized mezzanine form factor that installs into dedicated OCP slots in compliant servers, saving a PCIe slot and reducing cable clutter compared to traditional add-in cards.

Does BCM957504-N1100G support speeds below 100GbE?

Yes — the adapter supports auto-negotiation at 10GbE, 25GbE, and 50GbE, providing flexibility when connecting to lower-speed switch infrastructure during phased upgrades.

Is RoCE v2 supported out of the box?

Yes — RoCE v2 is supported natively via driver configuration. Enabling RDMA requires configuring Priority Flow Control (PFC) on connected switches for lossless Ethernet operation.

The Broadcom BCM957504-N1100G pushes the boundaries of OCP 3.0 server networking — combining 100GbE line-rate throughput, PCIe 4.0 bandwidth, RoCE v2 RDMA, and 256-VF SR-IOV in a compact mezzanine form factor that maximizes compute density and network performance for next-generation data center infrastructure.