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A Scalable Approach to Gigabit Ethernet

Broadcom Corporation 

■ BCM567x/BCM569x

White Paper

06/27/02

STRATAXGS FEATURES AND BENEFITS IN DEPTH

As mentioned, the StrataXGS architecture is modular, yet integrated, to allow system vendors to develop Gigabit Ethernet

switch products optimized for different market segments using the same components and familiar expertise. For additional

flexibility, the StrataXGS integrated circuits can be mixed and matched with Broadcom StrataSwitch Fast Ethernet chips,

which support 24 Fast Ethernet (10/100-Mbps ports) with two GE uplinks.

HiGigTM

5690

12 GE + 1 10-Gig

GE uplinks

5690

12 GE + 1 10-Gig

5645

24 FE + 2 GE

Figure 8: 24 FE Port + 22 GE Port Applications

EXPEDITED TIME TO MARKET

The architecture of the StrataXGS product family as described earlier was developed to enable system designers to bring

feature-rich systems to market quickly. The architecture enables this by giving designers a wide range of flexibility in the type

and size of systems they design while at the same time keeping the number of components required to do so small. Reducing

the chip count required for system design is a function of a high level of integration on each chip. Memory, SerDes, XAUI,

packet forwarding, and other capabilities are all collapsed onto a single component, reducing the complexity of board design.

The architecture also simplifies development tasks with the structured and portable Broadcom Switch API, described below.

BROADCOM SWITCH APPLICATION PROGRAMMING INTERFACE (API)

The Broadcom Switch API, which comes free of charge with the architecture, enables systems designers to layer

applications and their own software operating systems over the API without having to create special interfaces for each of

the underlying chip components. The structured API is a system-level software interface that separates function calls from

the driver component, so drivers do not have to be modified when a new function call is added. Developers, can then write

one command that can be driven to multiple components, while retaining the flexibility to exert chip-level control. Chip

components can thus be used ubiquitously, saving significant development time. System designers can quickly activate or

disable the features using the API, which is portable to Unix, Linux, and Wind River Systems’ VxWorks operating systems.

Broadcom Corporation

Page 14 StrataXGS Features and Benefits in Depth

Document 567x_569x-WP100-R

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