BCM56820LB0KFSBLG

Overview

The BCM56820LB0KFSBLG is a multilayer Ethernet switch chip providing 24 ports of 10-Gigabit Ethernet and four ports of 1-Gigabit Ethernet. It delivers line-rate full-duplex switching for over 240 Gbps. The device integrates Layer 2, VLAN, and Layer 3 tables with ten Quality of Service queues per port. It supports IPv4 and IPv6 Virtual Routing with L2/L3 tunneling capabilities. Advanced features include ContentAware Engine for deep packet inspection, intelligent scheduling with WRED and ECN, and HiGig/HiGig2 stacking technology.

Feature Summary

• Integrates 24 high-speed 10-GbE MACs alongside four 1-GbE ports within a single package.
• Provides advanced traffic management through multi-stage classification and intelligent buffer memory management units.
• Supports comprehensive security policies via hardware-based access control lists and flow classification at line rate.
• Enables flexible network expansion using proprietary HiGig and HiGig2 stacking protocols.

Applications

• Enterprise aggregation networks requiring high-density 10-Gigabit connectivity
• Data center core and distribution layer switching applications
• High-performance computing environments demanding ultralow latency
• Modular switch fabric cards for carrier-grade infrastructure

Procurement Notes

Verify the specific suffix LB0 against official Broadcom documentation to confirm temperature range and packaging details. Confirm RoHS compliance status and check for any product change notices or obsolescence alerts prior to finalizing procurement plans. Ensure supply chain partners provide valid traceability certificates.

Selection Notes

Select this component when designing systems that require high port density without increasing board space significantly. Evaluate the need for integrated SerDes and on-chip packet buffers to simplify system design. Consider compatibility with existing Broadcom SDKs if software reuse from previous deployments is a priority for the project timeline.

Part Context

This part belongs to the Broadcom BCM56820 family of multilayer Ethernet switches. It serves as a foundational building block for next-generation enterprise and data center networking equipment. The series is designed to offer superior performance metrics compared to earlier generations while maintaining backward compatibility with established software ecosystems.

Replacement Considerations

Consult official Broadcom substitution guides for verified alternatives. Cross-reference pinouts and electrical specifications carefully before considering any third-party components.

FAQ

What stacking technologies does the BCM56820 support?

It utilizes sixth-generation HiGig and HiGig2 stacking technology to facilitate full-speed upgrades while maintaining compatibility with existing deployed switches.

Does the chip support both IPv4 and IPv6 routing?

Yes, it provides full support for IPv4 and IPv6 Virtual Routing along with complete support for L2 and L3 tunnels such as GRE and 802.1ah.

How does the device handle congestion avoidance?

The intelligent scheduler incorporates built-in Weighted Random Early Discard (WRED) and Explicit Congestion Notification (ECN) mechanisms to manage traffic flow effectively.