BCM5346
®
17 PORT GIGABIT ETHERNET SWITCHING PROCESSOR
FEATURES
•
Supports 17 Gigabit Ethernet ports in wirespeed operation
•
Gigabit Ethernet ports support RGMII interfaces to Standard
GE Transceivers
•
Uplink port supports GMII interface
•
On-chip L2 search table supports 8K MAC addresses
SUMMARY OF BENEFITS
•
Enables a new generation of lower-cost switches with Gigabit
•
•
•
•
•
•
•
•
•
Ethernet connectivity and much smaller form factors.
Complete switch on a chip integrates multilayer forwarding
and filtering logic and internal ARL tables and packet
buffering.
Filters and forwards traffic at full wirespeed on all 17 ports at
all layers of functionality. This equates to 34 Gbps of
bandwidth.
Provides the most cost-effective Gigabit Ethernet connectivity
to the desktop for all remote and branch office as well as
enterprise workgroup needs.
Supports 8K internal MAC addresses so even large, segmented
networks can be supported.
Supports Quality of Service (QoS) for prioritization of
different traffic types.
Full support of VLANs allows separation of user groups and
minimizes superfluous traffic.
Jumbo frame support allows the device to be connected to
corporate server farms and networks while maintaining
maximum TCP/IP performance.
Supports the latest standards used in corporate networks for
discovery, management, access control, and traffic control.
On-chip MIB registers allows the collection and transmission
of statistics for each port and allows an upward migration path
for corporate users.
•
Jumbo Frame support (9 Kbyte)
•
Supports 4K VLAN address and 802.1s Multiple Spanning
Tree protocol
•
Supports 802.1w Rapid Spanning Tree
•
•
•
•
•
Supports 802.1p and/or DiffServ with four priority queues
Supports 802.3ad link aggregation
Supports selected MIB groups in RMON
Supports up to 256 IP multicast groups
Full-duplex and half-duplex operation with IEEE 802.3x flow
control and backpressure
•
On-chip 512 Kbyte packet buffer memory with sophisticated
buffer management
•
Offers per-port rate control
•
Supports 802.1x access control protocol
•
Extremely low power consumption (4W)
•
Packaged in 676-pin BGA
17 Gigabit Ethernet Ports for SOHO and Subnetwork Applications
PCs
Printer
Cable/DSL/Wireless
Router
Gigabit Ethernet Uplink
Copper or Fiber
IP Phone
Gigabit Ethernet Server
PC
OVERVIEW
Output
Queueing
Shared Buffer
Buffer
Manager
MIB
Counters
I/O
To Microcontroller
Serial
to
Parallel
Parallel
to
Serial
Table
Management
Port
Manager
L2 MAC
Table
Rx FIFO
Rx FIFO
Rx FIFO
The Broadcom BCM5346 device is a highly integrated solution
providing connectivity for 17 ports of Gigabit Ethernet. It combines all
the functions of a high-speed switch system, including packet buffer,
media access controllers, address management, and a nonblocking
switch fabric as well as a Microcontroller interface into a single 0.13 µm
CMOS device. It complies with IEEE 802.3, 802.3u, 802.3ab, and
802.3x specifications, including the MAC control, pause frame, and
auto-negotiation subsections, providing compatibility with all industry-
standard Ethernet, Fast Ethernet, and Gigabit Ethernet devices.
The BCM5346 is ideal for applications such as Gigabit Ethernet
workgroup switches, desktop switches, and data center switches.
The BCM5346 supports 17 Gigabit Ethernet ports in a single device with
all ports in wire speed operation. It offers 16 ports of RGMII (802.3ab,
1000BASE-T) interfaces with full-duplex operation at Gigabit Ethernet
Broadcom
®
, the pulse logo, and
Connecting everything
®
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.
5346-PB02-R
03/25/04
Tx FIFO
Tx FIFO
Tx FIFO
VLAN
Table
GMAC
G MAC
G MAC
G-Port
G-Port
G-Port
speed and full-duplex or half-duplex operation at 10/100 Mbps speed
(using 10BASE-T/100BASE-T).
The BCM5346 also offers one uplink port with a GMII interface for light
management or cascading purposes. It forwards Ethernet frames with
lengths between 64 bytes and 9216 bytes based on L2 MAC address
lookups in the 8k entry on-chip MAC address table with automatic
learning and aging support. The device supports four levels of priority
that can be either assigned from the 802.1p user priority bits or the TOS
field for Differentiated Services. The device also supports MAC access
control (802.1x) as well as port trunking (802.3ad). In addition,
individual ports can be rate controlled in 16 steps down to 64 Kbps.
The BCM5346 device offers a Microcontroller interface to support
lightly managed applications. All the required counters and frame
trapping mechanisms are incorporated into the device.
®
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
