BCM8332 FEATURES
BCM8332
BCM8332
FI0
FI31
BCM8320
BCM8320
BCM8320
S0
S3
CPU
CSIX
CSIX
CSIX
BCM8332 320 Gb Switching Solution
•Guaranteed Class of Service through the system –
Fabric Interface chip (BCM8320) schedules based on
destination, while the fabric switch chip (BCM8332)
schedules based on source. QoS can be set on a
source/destination basis with no interference from
other channels.
•Excellent Redundancy: All links that are used are
always active. N-1, N+1, and N¥2 redundancy modes
are all supported—no software intervention is
necessary.
•Automatic link failure detection—no software
intervention is necessary.
•Integrated SerDes provides a cost-effective and power-
conscious solution.
SUMMARY OF BENEFITS
80 GIGABIT SWITCH CHIP
•Highly integrated, scalable switch fabric
•Single-chip bandwidth of up to 80 Gbps
•System scalable to 640 Gbps
•96-byte or 112-byte payloads
•Flexible fabric speedup and redundancy schemes
• Additional speedup to handle Cell Size + 1 byte case
• Link failure causes graceful reduction in speedup
•Support for 16k Multicast Groups
• Full Multicast group ID carries through the fabric
•Two level Weighted Round Robin (WRR) or
WRR/strict priority scheduler
•Support for 128 weights per output tap
•Proven high-speed 3.125-Gbps SerDes Technology
•16-bit CPU interface @ up to 100 MHz
®
PRODUCTPRODUCT
BriefBrief
BCM8332
The BCM83XX switch fabric chipset is highly integrated and
scalable, switch fabric consisting of the BCM8320 Fabric
Interface chip and the BCM8332 Switch chip. The BCM83XX
switch fabric is ideal for applications such as Metro packet
aggregation, storage area networks, cellular packet infrastructure
and WAN core switching.
The BCM8332 has 32 3.125-Gbps SerDes links to the
BCM8320. The proven 3.125-Gbps integrated SerDes provides a
cost- and power-effective solution while minimizing the number
of backplane connections to the switch fabric.
By using additional BCM8332 devices, the speedup of the
BCM83XX Switch Fabric can be increased up to four times.
Unlike standard crossbar architectures, the BCM83XX switch
fabric does not need speedup to maintain line rate traffic.
However, a selectable speedup is offered to handle Cell Size + 1
byte traffic cases as well as compensate for embedded system
level headers.
The BCM83XX switch fabric provides exceptional fault
tolerance and redundancy including the options of N–1, N+1 and
N¥2 redundancy modes. Any link failure causes a graceful
degradation in speedup and allows continuous operation during a
failure or switch board replacement. Link failure detection is
done in hardware and does not require software intervention.
The BCM83XX switch fabric can support 16,000 multicast
groups and performs all replication in the switch fabric.
The BCM83XX switch fabric allows guaranteed Class of Service
through the system. Any input port can be guaranteed a traffic
rate to any egress port regardless of the rest of the traffic in the
system.
BCM8332 OVERVIEW
32 SerDes
3.125 Gbps
32 SerDes
3.125 Gbps
16 Bits
100 MHz
Multicast
Table
Flow
Control
Queue
Manager
Bandwidth
Allocation
Egress
Scheduler
Cell
Parser
CPU
Interface
BCM8332 Block Diagram
®
Phone: 949-450-8700
FAX: 949-450-8710
Email: info@broadcom.com
Web: www.broadcom.com
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 are the property of their respective owners.
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2002 by BROADCOM CORPORATION. All rights reser ved.
8332-PB02-R-6.13.02
