BOARDCOM BCM5676

BCM5676
®
BCM5676 4-PORT, 96-GBPS SWITCH FABRIC
SUMMARY OF BENEFITS
FEATURES
• Four 10-Gbps and 12-Gbps (HiGig+™) configurable switch
• System vendors can build high-performance, high-density
fabric ports
• Nonblocking, 96-Gbps wirespeed, backplane/switch fabric
performance
• Forwarding rate of 72 million packets/second
•
Multistage switch fabric scalable up to 750 Gbits
Eight integrated high-speed XAUI interfaces
•
Eight programmable priority queues per port
•
Port trunking (up to 4 ports) and mirroring across multiple
devices
• Hot-swap capable with AC coupling
• Supports redundancy on linecards for chassis-based
applications
• Advanced diagnostic features including IEEE 1149.1 boundary
scan, JTAG, and extensive BIST functionality
• Resilient link configuration through active multi-path
forwarding
• PCI and I2C interface
TARGET APPLICATIONS
• Switch fabric in modular Gigabit Ethernet chassis
• Switch fabric in high-port-count stand-alone or stackable
Gigabit Ethernet switches
• Switch fabric for in-server switch blade applications
• Packet-based switch fabric in telecom applications
Broadcom switch API compatibility
Advanced 0.13-µm CMOS technology
Small 600-pin EBGA package; pin-compatible with BCM5671
Low power consumption
Non-blocking 4-port HiGig+ Switch Fabric
10G/
12G
HiGig+
Interface
10G
HiGig+
FORWARDING TABLES
CMIC
RAM
HiGig+
HiGig+
QUEUE SYSTEM
10G/
12G
•
•
•
•
•
integration of voice, video, and data traffic
Built-in high-speed XAUI interfaces with Broadcom-unique
SerDes technology eases and accelerates system design, while
reducing cost and conserving board space
Large internal data buffer memory eliminates the need for
expensive external memory
Drives up to 10m of low-cost copper cables backplane and
stacking support
Broadcom switch API compatibility enables reuse of resources
and fast time-to-market
10G/
12G
•
•
•
•
Gigabit Ethernet LAN switches in several form factors
• Very low latency and advanced QoS enable seamless
HiGig+
Protocol
Processor
HiGig+
10G/
12G
4 channels
of 3.125/3.75
Gbps
(XAUI I/F)
OVERVIEW
Functional Design of BMC5676-Based 24-Port GE Switch With 2 x 10 GE Ports
2 x 10GE
SDRAM
BCM8703
BCM5676
PCI
BCM5674
BCM5695
BCM5695
BCM5695
BCM5464
BCM5464
12 x GE
12 x GE
General Description
The Broadcom BCM5676 switch fabric is the central component of the
modular and highly scalable StrataXGS™ Gigabit Ethernet switch
architecture. StrataXGS components can be applied in a wide variety of
configurations, enabling system designers to strategically balance cost,
port density, and performance in the products they build.
Scalability
Switches based on the BCM5676 offer world-class scalability and
performance when used in conjunction with other StrataXGS family
components. A BCM5676-based switch fabric can scale up to as many
as 768-GE ports or 64 10-GE ports in the same network. A multistage
switch fabric using the StrataXGS family can have a bandwidth capacity
of up to 750 Gbits.
Highly Integrated
The integration of Broadcom’s robust XAUI-compatible serializer/
deserializer (SerDes) interface on each BCM5676 port reduces board
complexity. The XAUI interface can be used to route high-speed signals
FLASH
CPU
across 44 inches of FR4, connectors, and backplanes. SerDes technology
also enables the use of inexpensive cables for stacking applications.
Superior Performance
The BCM5676 delivers wirespeed switching performance across all of
the ports simultaneously. The effective bandwidth of each HiGig+™
interface is 24 Gbps (12 Gbps, full-duplex). The BCM5676 switch fabric
offers a backplane capacity of up to 96 Gbps and can interconnect with
other StrataXGS components for switch fabric of up to 750 Gbits. It
introduces very low switching latency, enabling the high-quality
transmission of voice, video, and data traffic.
Flexible Management
The BCM5676 HiGig+ switch links to a host CPU through a PCI bus at
speeds of up to 66 MHz. Bus mastering and advanced DMA are
supported in hardware for the efficient exchange of packet data between
CPU memory and the BCM5676 switch.
The BCM5676 switch can also work without host CPU support, using an
I2C interface and external microcontroller to initialize chip registers and
forwarding tables.
Broadcom®, the pulse logo Connecting everything®, HiGig™, and StrataXGS™ are trademarks of
Broadcom Corporation and/or its subsidiaries in the United States and certain other countries. All other
trademarks mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5676-PB00-R
03/31/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com