BCM56960 Series

High-Density 25/100 Gigabit Ethernet StrataXGS® Tomahawk Ethernet Switch Series

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Broadcom's BCM56960 Series, also known as the StrataXGS® Tomahawk switch series, can help build highly scalable, feature-rich, top-of-rack (ToR), blade or aggregation switches to enable cloud-scale networking. StrataXGS Tomahawk is the first series of switches to offer 25 Gb/s SerDes in support of 25/50/100GbE. It provides a total switching capacity of 3.2 Tb/s ranging from 32 ports of 100 GbE to 128 ports of 25 GbE, with the flexibility to configure port type and speed to suit any high-performance networking application.

The StrataXGS Tomahawk switch series includes BroadView™ instrumentation, which provides operators the telemetry to troubleshoot large-scale networks, apply controls for optimal performance, respond to potential problems before they happen and drive down OPEX. This includes extensive application flow and debug statistics, link health and utilization monitors, streaming network congestion detection and packet-tracing capabilities.


Support for up to 32 × 100 GbE, 64 × 40/50 GbE or even 128 × 25 GbE ports with an aggregate switching bandwidth of 3.2 Tb/s
Integrated low-power 25Ghz SerDes
Authoritative support for 25G and 50G Ethernet Consortium specification
Configurable pipeline latency enabling sub-400 ns port-to-port operation
Supports high-performance storage/RDMA protocols including RoCE and RoCEv2
BroadView instrumentation provides switch- and network-level telemetry
High-density FleXGS™ flow processing for configurable forwarding/match/action capabilities
OpenFlow 1.3+ support using Broadcom OF-DPA™
Comprehensive overlay and tunneling support including VXLAN, NVGRE, MPLS, SPB
Flexible policy enforcement for existing and new virtualization protocols
Enhanced Smart-Hash™ load-balancing modes for leaf-spine congestion avoidance
Integrated Smart-Buffer™ technology with 5x greater performance vs. static buffering
Single-chip and multichip HiGig™ solutions for top-of-rack and scalable chassis applications


  • Data Center Servers (switching)
  • Switches

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
SerDes / GPHY 128 x 25G
I/O Bandwidth (Gbps) 3200
Bandwidth UOM Gbps
I/O BANDWIDTH (Gbps) 3200 Gbps


28nm Octal 25G/28G Unidirectional Repeater


28nm Octal 25G/28G Bidirectional Repeater


Multiport Ultra-Low Power Fast Ethernet Switch