BCM8320 PRODUCT Brief (R) DUAL 10G B C M 8 3 2 0 FABRIC F E AT U R E S * Highly integrated, scalable switch fabric * Single-chip bandwidth of up to 40 Gbps two CSIX interfaces to line side * *Supports Each CSIX supports 32, 64, or 128 bits at speeds up to 166 MHz * HSTL Class 1 drivers * Optional out-of-band flow control * Four Egress Queues per CSIX interface * 96-byte or 112-byte payloads fabric speedup and redundancy schemes * *Flexible Additional speedup to handle Cell Size + 1 byte case * Link failure causes graceful reduction in speed-up for 16k Multicast Groups * *Support Full multicast group ID carries through the fabric * Static or dynamic configurable VOQ cell buffering Single level or hierarchical Weighted Round Robin * scheduling high-speed 3.125 Gbps SerDes technology * *Proven Built-in BERT INTERFACE S U M M A R Y O F B E N E F I T S Class of Service through the system - * Guaranteed 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. * Supports dual 10G interfaces in a single device. Excellent redundancy: all links that are used are * always active. N-1, N+1, and N2 redundancy modes are all supported - no software intervention is necessary. link failure detection - no software * Automatic intervention is necessary. Integrated SerDes provides a cost-effective and power* conscious solution. * SerDes runs over backplane or infiniband cables * 16-bit CPU interface @ up to 66 MHz BCM8320 System Architecture BCM8332 CSIX BCM8320 FI0 CSIX S0 BCM8332 BCM8332 BCM8332 BCM8332 BCM8332 S4 BCM8320 BCM8332 S3 BCM8332 S7 CPU FI31 Optional redundancy and speed-up B C M 8 3 2 0 O V E R V I E W BCM8320 Block Diagram CSIX Interface CSIX Ingress FIFOs Ingress Queue Manager and Scheduler Egress FIFOs Egress Queue Manager and Scheduler Flow Control OOB Flow Control CSIX CSIX Interface 16 Bits 100 MHz CPU Interface The BCM83XX switch fabric chipset is a highly integrated 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 BCM8320 supports up to two OC-192 CSIX ports per fabric interface chip. Each CSIX interface allows Traffic management devices supporting 32-bit- to 128-bit- wide interfaces to connect to the BCM83XX switch fabric. The BCM8320 has sixteen 3.125-Gbps SerDes links to the BCM8332 devices. These links are 8b/10b encoded, providing a true 2.5Gbps data link. The fabric can support up to a 4X speedup if all the SerDes links are used. 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 compensation for embedded system level headers. Cell Parser 16 SerDes 3.125 Gbps 16 SeDes 3.125 Gbps The BCM83XX switch fabric provides exceptional fault tolerance and redundancy including the options of N-1, N+1 and N2 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 performed in hardware and does not require software intervention. The BCM83XX switch fabric can support 16k multicast groups and performs all replication in the switch fabric. 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. Broadcom(R), the pulse logo, and Connecting everything(R) 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. (R) BROADCOM CORPORATION 16215 Alton Parkway, P.O. Box 57013 Irvine, California 92619-7013 (c) 2003 by BROADCOM CORPORATION. All rights reserved. 8320-PB03-R-6.13.03 Phone: 949-450-8700 FAX: 949-450-8710 Email: info@broadcom.com Web: www.broadcom.com