BCM569X データシートの表示（PDF） - Broadcom Corporation

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BCM569X

A Scalable Approach to Gigabit Ethernet

Broadcom Corporation 

White Paper

06/27/02

■ BCM567x/BCM569x

OSPF

Telnet

Other Services

Switch/system vendor’s management

software application

BROADCOM API

Broadcom

StrataSwitch or

other Broadcom

chip

Broadcom StrataXGS

chip family member

Note: The proven, reliable Broadcom development API hastens

system vendors’ time to market with new GE switches.

Figure 9: The Broadcom API at Work

INTEGRATED APPROACH TO STACKING

As mentioned, StrataXGS products provide a stacking solution for connecting modules across a HiGig interface in a tightly

integrated way that extends a number of powerful features across all the components so that no functionality is lost. The

XAUI-based HiGig interface extends the reach of features at wire speeds across both switch fabrics and cables. These

features, for example, include trunking, port mirroring, VLAN membership, QoS, and a single IP address for unified

management. In addition, multicast packets are distributed efficiently across the stack without replicating the packet at the

source.

By contrast, stackables built with competing products today have loose connections across the set of switches and do not

offer the integration of these services across the modules. For example, in stackable switches built on competing

architectures, QoS mechanisms enforced at the interface level on a switch are lost when the frame is placed on the stack

media. This is not the case with StrataXGS.

The integration is achieved by the 8-byte HiGig tag, which carries information relevant to trunking and port mirroring across

the stack and is added to each packet that traverses the stack across HiGig interfaces. A single CPU and command line

interface (CLI) are used for management across a stack.

In addition, new advanced discovery and management protocols are available for stackable systems. These protocols,

Master Discovery Protocol (MDP) and Reliable Data Protocol (RDP), designate a master device for control and management

in a stack of chips. They also define a backup master, should the primary master fail. Both MDP and RDP run on top of the

Broadcom API.

Document 567x_569x-WP100-R

Broadcom Corporation

StrataXGS Features and Benefits in Depth Page 15

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