06/27/02 16215 Alton Parkway P.O. 57013 Irvine, Califor

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WHITE PAPER Scalable Approach Gigabit Ethernet Switch Design
06/27/02
16215 Alton Parkway
P.O. 57013
Irvine, California 92619-7013
Phone: 949-450-8700
Fax: 949-450-8710
REVISION HISTORY
Revision 567x_569x-WP100-R Date 06/27/02 Change Description Initial Release
Broadcom Corporation 16215 Alton Parkway P.O. 57013 Irvine, California 92619-7013 Copyright 2002 Broadcom Corporation rights reserved Printed U.S.A.
Broadcom® pulse logo® trademarks Broadcom Corporation and/or subsidiaries United States certain other countries. other trademarks property their respective owners.
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TABLE CONTENTS
Switching Landscape. Market Opportunity Design Challenges. StrataXGS Gigabit Ethernet Architecture Reduced Components Interoperability with Broadcom StrataSwitch. Quality Service. HiGigInterface Integrated Serializer/Deserializer (SerDes). StrataXGS Product Family What Build Build Types Systems Interconnect Decisions. Other System Design Decisions Fixed Systems Stackable Systems Modular Chassis Integrated Switch/Servers Unmanaged Systems. System differentiation Build Buy?. StrataXGS Features Benefits Depth. Expedited Time Market Broadcom Switch Application Programming Interface (API). Integrated Approach Stacking. Resiliency/Redundancy Port Level Performance Traffic Prioritization Management Layer Features Layer Features Security Integrated SerDes Interface Switch Development Evaluation System Sample System Configurations Summary Conclusion
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LIST FIGURES
Figure Figure Figure Figure Figure Figure Figure Figure Figure BCM5670 Block Diagram BCM5690 Block Diagram Enterprise Applications: Scalable Architecture Building Different Types Systems. Simplex Interconnect. Full-duplex Interconnect.10 Matrix Interconnect.10 Daisy Chain Interconnect Port Port Applications Broadcom Work
Figure Fixed 24-port Switch with Optional Advanced Function Module Figure 24-port Switch with Active Stack Module Figure 48-port Nonblocking Switch.21
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LIST TABLES
Table Table Table Table StrataXGS Chips. Summary System Interconnect Considerations Features Implemented. StrataXGS Part Numbers
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SWITCHING LANDSCAPE
Enterprise network traffic volumes accelerating quickly. result, organizations seeking much faster connections-to gigabit speeds beyond-not only their campus backbones, also their wiring closets highspeed connectivity user desktops. There several application drivers behind exploding volumes enterprise traffic. Businesses continuing grow progressively more reliant their corporate networks automating their business processes. example, Web-centric applications, often multimedia nature, have emerged only reach employees across corporate intranets, also enable enterprises communicate with their business partners across extranets serve customers Internet. Specifically, primary applications driving gigabit-speed network requirements include following: Storage-area networks, which allow multiple servers access same storage devices connected multi gigabit-speed switch Network-based corporate training, often involving streaming media interactive video conferencing Network-based transport server data backup PBXs, which enable convergence voice data corporate
Projected Gigabit Ethernet Growth*
Ports millions)
Equipment Sales $Billions)
$18.9 $11.5
2001 2006 2001 2006
*Combined 1-GE 10-GE market opportunity Source: Pioneer Consulting,
MARKET OPPORTUNITY
sheer volume traffic spilling onto corporate networks driving Gigabit Ethernet switch requirements. Dell'Oro Group, example, predicts that worldwide Ethernet switch sales will increase from $11.5 billion 2001 $18.9 billion 2006. firm attributes predicted growth availability 10-Gigabit Ethernet, Gigabit Ethernet over copper, Layer Ethernet switching technologies. These market figures indicate that switch makers quickly coming under market pressure deliver their Gigabit Ethernet systems.
DESIGN CHALLENGES
this milieu, equipment-makers faced with several challenges. These include being able quickly build highavailability, high-throughput devices that scale meet needs various-sized growing businesses. Designers also must able easily setup their devices configurations that match their target customer application. These configurations include following: Stackable switches wiring closet applications Chassis-based systems highly resilient backbone applications Integrated switch/servers high-speed server interconnections Standalone "fixed" switches small/medium-sized enterprise applications Unmanaged switches small environments with support
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Another prevalent system challenge minimize design, assembly, manufacturing costs. Methods lowering total costs constructing switch using minimum number components, reusing chip resources development expertise, using simple board assembly. what about system features? satisfy customer requirements, switch makers must consider including most, all, following capabilities their products: Layer switching with associated 802.1Q Virtual (VLAN) support 802.1p traffic classification capabilities Layer routing Quality service (QoS) prioritizing certain traffic, such latency-sensitive voice over (VoIP) packets Layer multicasting bandwidth-efficient point-to-multipoint transmissions Very high levels resiliency switch uptime ensure network reliability high-throughput backplane that enables wire-speed performance Scalability-including high port density small amount board space-so customers grow their networks needed reasonable cost port Security, such per-port address filtering, firewall filtering, intrusion detection capabilities ability integrate features such QoS, trunking, port mirroring (for diagnostics) across interconnected modules ensure consistent performance resiliency,
these capabilities supported Broadcom StrataXGSSwitch Architecture from Broadcom Corporation. sections that follow examine components attributes this modular highly integrated architecture. following sections will also discuss form factors that designed with StrataXGS family-often, conjunction with members Broadcom's StrataSwitch IIFast Ethernet (10/100 Mbps) family-and important decisions design considerations that accompany building these devices.
STRATAXGS GIGABIT ETHERNET ARCHITECTURE
REDUCED COMPONENTS
Broadcom StrataXGS architecture been designed that only small number components required build variety Layer systems different form factors that support range port densities. StrataXGS components support high level integration, with memory, interfaces, packet forwarding other capabilities supported on-chip. integrated nature architecture delivers approximately reduction number chips required over competing solutions, which results lower manufacturing costs. reduced component count also yields higher-quality products because decreased complexity; Broadcom estimates that StrataXGS solution reduces mean time between failures (MTBF) about 20%.
INTEROPERABILITY WITH BROADCOM STRATASWITCH
StrataXGS architecture extension proven Broadcom StrataSwitch (Fast Ethernet) architecture. There already million StrataSwitch ports deployed marketplace today. StrataXGS compatible with StrataSwitch several ways. First, packet flows from ingress egress same. Secondly, memory management consistent across architectures. Lastly, fourth-generation Broadcom Switch Application Programming Interface (API) enabling custom features portable across both families. integrated nature architectures enables designers familiar with Broadcom StrataSwitch re-use their engineering development expertise, which lowers costs expedites time market. Switch-makers also both StrataSwitch StrataXGS chips building blocks common design Fast Ethernet, Gigabit Ethernet, 10-Gigabit Ethernet ports standalone/fixed, chassis, stackable, server, unmanaged switch form factors.
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With StrataXGS family, Broadcom improved StrataSwitch architecture several ways: depth address tables routing information been significantly increased. Switches that store more route entries support greater number attached devices. StrataXGS family components uses widely used approach called hashing, which increases table lookup performance compared with binary search capabilities. Broadcom built special 10-Gbps chip-to-chip interface, which improves Scalability performance.
QUALITY SERVICE
StrataXGS chips offer extensive support packet classification, marking, prioritization enable support. increasingly checklist item enterprise customers, beginning latency-sensitive applications such VoIP locally. customers might also want ensure integrity high-priority data applications enforce access control lists (ACLs). leveraging HiGig interface, class-of-service markings integrated across stack chips used build system that markings lost when packets passed from component another. StrataXGS chip ports support eight queues into which traffic with different priority weights placed.
HIGIGINTERFACE
Broadcom product family 10-Gbps, full-duplex chip-to-chip interface that enhances system scalability performance, called HiGig interface. adds 8-byte header Layer frame exits interface. This header contains information about packet, source destination ports, port mirroring. This information hastens table lookups when Broadcom components connected together, thus improving overall system performance. HiGig interface allows interconnection several StrataXGS chip modules form systems with different port densities. Communication between CPUs, process called stacking, performed in-band HiGig header using special master/slave protocols developed Broadcom. Link aggregation, port mirroring, class-of-service markings fully supported across interconnected modules wire speeds.
INTEGRATED SERIALIZER/DESERIALIZER (SERDES)
SerDes interface-which converts data from parallel into serial stream-is integrated onto each port each StrataXGS chip. This design precludes connections external SerDes chips, simplifying design. integrated SerDes support, functions, Broadcom API, other StrataXGS features described more detail section, "StrataXGS Features Benefits Depth."
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STRATAXGS PRODUCT FAMILY
primary chip components Broadcom StrataXGS Gigabit Ethernet switch architecture StrataXGS BCM5670 StrataXGS BCM5690. BCM5670 high-speed (160-Gbps) switch fabric, also called backplane interconnect, that eight 10-Gbps ports. smaller version, BCM5671, 80-Gbps switch fabric with four 10-Gbps ports. 10-Gbps ports BCM5670 BCM5671 building blocks interconnecting line cards switch fabric. 10-slot chassis, example, designed with eight line cards management cards. 10-Gbps ports BCM5670/71 accept traffic from 10-Gbps uplinks other chip components, these arranged variety configurations build Gigabit Ethernet switch size configuration that matches designer's business plan. Once traffic placed switch fabric, switched, with delay, egress port. Switching with delay possible because total bandwidth available switch fabric greater than speeds ports feeding traffic onto Therefore, buffering queues required that could introduce added delays. This design approach called nonblocking architecture. Combining chips expands number ports system while also retaining nonblocking throughput characteristics single switch.
priority levels port
HiGig HiGig
HiGig HiGig HiGig HiGig
On-chip Memory
QUEUE SYSTEM
HiGig HiGig
Lookup HiGig Frame
Figure BCM5670 Block Diagram
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other primary StrataXGS component, BCM5690, switch-on-a-chip. supports twelve 1-Gbps ports HiGig (10-Gbps) interface. BCM5690 used standalone fashion build fixed 12-port switch, combined with other BCM5690s, BCM5670s, StrataSwitch components form different-sized configurations achieve higher port densities. example, eight BCM5690s combine scale from ports. Designers link many chips (not including switch fabric) maximum configuration ports (ports using Broadcom components) with BCM5673) 10-GE ports. also create system containing Fast Ethernet using X-StrataSwitch Y-XGS components.
HiGigCPU/IO SRAM
Packet Buffer
MAC(s)
ContentAwarepacket treatment
1-Gbps ports
Figure BCM5690 Block Diagram
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Another product, BCM5691, supports ports uplink, standalone configurations. Both BCM5690 BCM5691 support standard moving signals from and, case BCM5690, uplink. StrataXGS chips highly programmable, that system designers value differentiate their companies' products activating certain features with minor development work software. Using Broadcom API, features easily added existing chip.
Table StrataXGS Chips Product BCM5670 Function(s) 160-Gbps switch fabric. nonblocking, allowing ports operate concurrently 100% utilization. Switch-on-a chip combined back-to-back with another BCM5690 BCM5670(s) build bigger systems achieve higher port densities Eight BCM5690s combine scale from ports Supports both Layer Layer capabilities BCM5671 80-Gbps switch fabric. nonblocking, allowing ports operate concurrently 100% utilization. Switch-on-a chip Supports both Layer Layer capabilities Four 10-Gbps ports Type Ports Supported Eight 10-Gbps ports
BCM5690
Twelve 1-Gbps ports, each running 10/100 full- halfduplex Gbps full-duplex speeds
10-Gbps uplink
BCM5691
Twelve 1-Gbps ports, each running 10/100 full- halfduplex Gbps full-duplex speeds
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WHAT BUILD BUILD
There many types Gigabit Ethernet switches that designer might elect build, depending enterprise applications switch vendor wishes support. switch vendor might focus building particular type system that addresses needs specific customer environment application. vendor might design manufacture family switches satisfy range business customer applications, such large enterprise's wiring closet, campus backbone, small branch office.
TYPES SYSTEMS
List below, some types switches that switch vendor design with Product Family
Stackable Switches. These connect user desktops high-speed campus backbone. These highly scalable switches contain some number Gigabit Ethernet Fast Ethernet "user" ports. Traffic from these ports aggregated over HiGig uplink connectivity corporate data resources servers and, increasingly, call servers PBXs VoIP applications. Stackables often found wiring closet network segment accommodate growing user base. additional users join network, more ports added "stacking" additional switches another with common external interconnect; effect, creating integrated switch. Chassis-based Switches. This form factor generally deployed highly resilient backbone applications. These
systems contain slots that used redundant line cards, including system buses, power supplies, security. They configured with redundant components degree deemed appropriate redundancy manageability required installation.
Integrated Switch/Servers. This configuration combines application data servers with network switches, thus allowing very high-speed server interconnections. this configuration, server blades generally interconnected across switch backplane. SerDes support StrataXGS chips plays large role this application, enabling high-speed connections across backplane. integrated switch/server form factor generally appeals customers looking very high-speed server connectivity while wishing collapse functions into single device reduce capital costs management complexity. Standalone "Fixed" Switches. These most often used small/medium-sized enterprise applications, where high growth expected. These systems arrive with fixed number ports. order customer accommodate additional users beyond number ports that switch, additional systems must purchased. Unmanaged Switches. This form factor represents simplest devices operates only Layer which
reduces software development makes low-cost interfaces. These switches generally installed small environments with support where packet classification/prioritization VoIP high-priority data applications required.
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24-port Standalone Switch
HiGig
24-port-and-up Stackable Chassis Switch
HiGig
BCM5690
user ports
BCM5690
user ports
BCM5671
BCM5690
user ports
BCM5690
user ports
Chassis Server/Switch System with ports ports
HiGig
BCM5670
BCM5690
user ports
BCM5690
user ports
BCM5690
user ports
BCM5690
user ports
BCM5690
user ports
BCM5690
user ports
Figure Enterprise Applications: Scalable Architecture Building Different Types Systems
Note Having common building blocks that used build different types switches provides high
software investments expedited time market.
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INTERCONNECT DECISIONS
each Gigabit Ethernet switch form factor, designers require chips, physical-layer interfaces (including cabling connectors), management system, power supply, operating system activating customizing features. From there, some decisions switch vendor/designer must make include whether switch should single-chip multiple-chip solution, this largely depends number ports supported. multiple-chip solutions, designers must decide what type interconnect should used link components pass packets between them. choices interconnects include cascade, matrix, daisy chain options. StrataXGS cost-effectively supports these configurations, which described more detail below.
Cascade. This simplest interconnect choice, most often used low-end standalone/fixed systems. this configuration, chips connected shared-ring fashion; transmitter module connected receiver next module, transmitter last module connected receiver first module.
merits this interconnect choice that least expensive uses resources; ports, backplanes other resources shared.
One-way packet flow
BCM5690
BCM5690
BCM5690
Figure Simplex Interconnect
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Two-way packet flow
BCM5690
BCM5690
BCM5690
Figure Full-duplex Interconnect
Matrix. This type interconnect typically used chassis-based systems higher-end fixed systems. this
configuration, switching components away from central processor that controls switches. Here, switching fabric (BCM5670 5671) serves backplane multiple BCM5690s that connected resiliency, matrix-based system configured with redundant central processor, with switching chips interconnected both processors full-mesh configuration. This interconnect approach adds reliability systems.
BCM5670 BCM5670
BCM5671
BCM5671
BCM5671
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
Figure Matrix Interconnect
Daisy Chain. daisy chain configuration, switches interconnected another series. This modular
configuration highly scalable, there virtually limit number incremental ports central management
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power that added. These characteristics most appropriate wiring closets enterprise organizations where growth expected unpredictable. Each daisy chain-connected switch typically built using BCM5670s with multiple BCM5690s connected them.
BCM5671
BCM5671
BCM5671
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
Figure Daisy Chain Interconnect
Table Summary System Interconnect Considerations System Candidate(s) Simplex Duplex Fixed, low-end Chassis Performance Low, could boost with addition BCM5680 transmission path High High Comparative Cost Low` Benefits Low-cost, simple Low-cost, simple, with path redundancy added resiliency
Cascade Matrix Daisy Chain
Fixed, low-end Stackable, Fixed, Chassis Stackable
High Medium
Cost-effective Very high resiliency Very scalable, nonblocking
Switch vendors have variety choices interconnect configuration, depending type system being built vendor's priorities performance, management, cost.
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OTHER SYSTEM DESIGN DECISIONS
addition deciding among various types component interconnects, other decisions must made each type switch developed. primary ones outlined below.
FIXED SYSTEMS
designer needs make design choices system have more than ports. there fewer ports system, designer simply BCM5691 standalone switch. achieve larger port densities, BCM5690 combined with additional BCM5690s BCM5670 switch fabrics. this point, designer must decide switch should optimized cost performance. designer decides that system cost most important factor, cascade interconnect linking chip componentry should chosen, BCM5690s will linked without benefit BCM5670 switch fabric shared-bandwidth configuration. designer decides that system performance most important factor, matrix interconnect linking chip componentry should chosen. addition, BCM5670 BCM5671) switch fabric will likely included configuration that packets transmitted over switched, rather than shared, backplane.
STACKABLE SYSTEMS
Here, designer must decide per-switch port count, then choose among optional modules features capabilities activated. highest-redundancy levels stack, designers likely choose matrix interconnect; highest performance, daisy-chain interconnect recommended. Which cabling medium another decision made when building stackable switches. System vendors choose fiber cabling various categories copper cabling, gigabit interface converters (GBICs) available converting electrical copper signals fiber-optics. Designers also have option using backplane trace connect switches another directly.
MODULAR CHASSIS
When designing these backbone devices, switch vendor must decide balance redundancy backplane resiliency uptime with performance each slot system. redundancy, designers choose connect HiGig connections each blade separate switch fabrics master/slave configuration. Alternatively, designer connect each slot full mesh configuration, rather than using switching fabric. This highly redundant setup; however, does cause some performance degradation each slot. From performance perspective, system vendor elects configure switch fabrics master/slave setup, Broadcom recommends running both switch fabrics concurrently, rather than leaving idle standby mode failover. From management perspective, chassis system, switch vendor must decide whether centralized management blade distribute management capabilities across individual blades. latter choice often more scalable, switch makers more complex management features incrementally system required.
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INTEGRATED SWITCH/SERVERS
these systems, maximum port density usually greater than ports. decisions here same those fixed system whether interconnect switching chips with cascading matrix interconnect.
UNMANAGED SYSTEMS
These systems generally fixed systems that installed slow- non-growth environments. Again, decisions here port count which interconnect type use.
SYSTEM DIFFERENTIATION
Depending vendor programs chips, system designers derive different values StrataXGS family. example, they choose activate customize number routing, security, voice features. reduce componentry development time, designers Advanced Function Module, network processor that software-upgradable, activate server load balancing, interfaces, firewall functions VoIP call server capabilities across components given system (see Figure "Sample System Configurations" section).
BUILD BUY?
Another decision facing system vendors whether they should develop their software operating system customizing activating features whether they should Those wish purchase third-party software acquire Broadcom API-compatible operating systems from Broadcom partners RADLAN Wind River Systems Inc. system vendor elects build software, Broadcom Switch reduces development time effort shielding upper-layer network applications operating systems from Layer interfaces. Using Broadcom enables easy migration between switch products generations (see "Broadcom Switch Application Programming Interface (API)" page 14).
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STRATAXGS FEATURES BENEFITS DEPTH
mentioned, StrataXGS architecture modular, integrated, allow system vendors develop Gigabit Ethernet switch products optimized different market segments using same components familiar expertise. additional flexibility, StrataXGS integrated circuits mixed matched with Broadcom StrataSwitch Fast Ethernet chips, which support Fast Ethernet (10/100-Mbps ports) with uplinks.
HiGig
5690
10-Gig uplinks
5690
10-Gig
5645
Figure Port Port Applications
EXPEDITED TIME MARKET
architecture StrataXGS product family described earlier developed enable system designers bring feature-rich systems market quickly. architecture enables this giving designers wide range flexibility type size systems they design while same time keeping number components required small. Reducing chip count required system design function high level integration each chip. Memory, SerDes, XAUI, packet forwarding, other capabilities collapsed onto single component, reducing complexity board design. architecture also simplifies development tasks with structured portable Broadcom Switch API, described below.
BROADCOM SWITCH APPLICATION PROGRAMMING INTERFACE (API)
Broadcom Switch API, which comes free charge with architecture, enables systems designers layer applications their software operating systems over without having create special interfaces each underlying chip components. structured system-level software interface that separates function calls from driver component, drivers have modified when function call added. Developers, then write command that driven multiple components, while retaining flexibility exert chip-level control. Chip components thus used ubiquitously, saving significant development time. System designers quickly activate disable features using API, which portable Unix, Linux, Wind River Systems' VxWorks operating systems.
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OSPF
Telnet
Other Services
Switch/system vendor's management software application BROADCOM Broadcom StrataSwitch other Broadcom chip Broadcom StrataXGS chip family member
Note: proven, reliable Broadcom development hastens system vendors' time market with switches.
Figure Broadcom Work
INTEGRATED APPROACH STACKING
mentioned, StrataXGS products provide stacking solution connecting modules across HiGig interface tightly integrated that extends number powerful features across components that functionality lost. XAUI-based HiGig interface extends reach features wire speeds across both switch fabrics cables. These features, example, include trunking, port mirroring, VLAN membership, QoS, single address unified management. addition, multicast packets distributed efficiently across stack without replicating packet source. contrast, stackables built with competing products today have loose connections across switches offer integration these services across modules. example, stackable switches built competing architectures, mechanisms enforced interface level switch lost when frame placed stack media. This case with StrataXGS. integration achieved 8-byte HiGig tag, which carries information relevant trunking port mirroring across stack added each packet that traverses stack across HiGig interfaces. single command line interface (CLI) used management across stack. addition, advanced discovery management protocols available stackable systems. These protocols, Master Discovery Protocol (MDP) Reliable Data Protocol (RDP), designate master device control management stack chips. They also define backup master, should primary master fail. Both Broadcom API.
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RESILIENCY/REDUNDANCY PORT LEVEL
Enterprise customers requiring near-100% uptime their network equipment now, data applications grow increasingly mission-critical voice traffic (for which businesses have virtually tolerance downtime) joins LAN. There several ways that StrataXGS architecture addresses this requirement. First, BCM5670 redundant link that system vendors connect different ports across multiple paths. Designers also build dual-chip configuration trunk ports between StrataXGS chips. When both connections running, traffic shared between connections. However, connection should fail, traffic will automatically fail over live chip. This function full compliance with IEEE 802.3ad specification trunking. Port mirroring also supported; activity particular port copied onto another designated port, which sniffer attached debugging running diagnostics. This enables problems addressed without having take components commission while doing contributing considerably system uptime.
PERFORMANCE
StrataXGS architecture, mentioned, allows nonblocking, wire-speed performance because aggregate bandwidth backplane greater than incoming ports. Activating number intelligent features, such QoS, does affect performance, which million packets second (pps) across backplane. Another feature that contributes high-end performance support dual trunking, which enables traffic load sharing. StrataXGS also prevents head-of-line (HOL) blocking boost throughput. prevent blocking, when egress port congested because Class Service (CoS) markings, packets destined that port dropped ingress. Flow control mechanisms also work enhance performance. system send "pause" frames when number packets given port exceeds predefined threshold. These features also contributing factors QoS.
TRAFFIC PRIORITIZATION MANAGEMENT
IETF Differentiated Services (DiffServ)-compliant capabilities enable systems built StrataXGS architecture mark Differentiated Services Code Point (DSCP) bits order classify frame, then take action frame based that class. Broadcom ContentAwareclassification engine StrataXGS chips allows wire-speed Layer through Layer classification management. This means that treatment packets through switch determined based application type. Broadcom-patented Fast Filter Processor(FFP) enables switches take action frames according "if/then" scenarios. example, specific packet could dropped, have priority changed, steered specific port number event that certain network conditions exist. packet inspection, filtering, trapping, modification, steering performed takes place wire speed. FFP-enabled packet treatments require some customization part switch designer. capabilities StrataXGS family also include metering/rate limiting ceiling amount network bandwidth that application, protocol, user consume. StrataXGS components inspect transmission bytes deep wire speed control bandwidth each port Mbps granularity. Systems vendors write software specifying what frames recognize what action take those frames. StrataXGS supports QoSawareness enterprise network components, including 802.11x wireless access points VoIP phones that connected Ethernet segment. Packets destined have separate priority than rest ports; four priority classes defined. Packets headed selectively enabled disabled.
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LAYER FEATURES
StrataXGS supports Layer switching capabilities hardware greater performance. These capabilities are, autolearning addresses, address lookup, packet forwarding. StrataXGS switches support 4096 VLANs, Spanning Trees, Layer multicast sessions, 16384 Layer switch table entries.
LAYER FEATURES
Layer increased performance, hardware handles routing table lookup forwarding. StrataXGS switches support 4096 Layer routing table entries virtual router interfaces.
SECURITY
StrataXGS supports IEEE 802.1x authentication framework port-based network access control. Also, per-port security offered avoid denial-of-service (DoS) attacks. This achieved denying access certain addresses programming bits routing table rejected. Table Features1 Implemented Broadcom Fast Filter Processor Chip/API Support (minimal initialization) Software programming switch designer
Switch Function VoIP call server (IP/PBX) Layer switching Layer switching (routing) Billing accounting Bandwidth demand Policy management DiffServ 802.1p/Q Remote Monitoring (RMON) Mirroring Trunking Multicast Per-port security
1.Basic features, noncustomized Note many rich features supported StrataXGS architecture activated different ways. Most
require some custom programming addition basic support StrataXGS chip.
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INTEGRATED SERDES INTERFACE
integration high-speed XAUI-compatible SerDes interface each port reduces complexity board layout, because eliminates need component connect external SerDes chip. SerDes interface connects both copper fiber media. StrataXGS 1-Gbps ports, SerDes runs 1-Gbps. StrataXGS 10-Gbps ports, four serial channels, each running 3.125 Gbps, supported. SerDes delivers reduced signal traces, conserves board space, consumes lower power than parallel interfaces, delivers superior electromagnetic interference (EMI) performance (8b/ 10b). When StrataXGS 1-Gbps ports with integrated SerDes connect copper transceivers, they using Serial Gigabit Media Independent Interfaces (SGMII), which reduces count four, down from compared with using Gigabit Media Independent Interfaces (GMII). reduced count lowers costs simplifies design.
SWITCH DEVELOPMENT EVALUATION SYSTEM
Broadcom will supply reference boards fully functional switch evaluation jump-start system vendor's development process. BCM95690 SDK, example, available complete 24-port gigabit Ethernet Layer SDK, evaluation system based BCM5690 switch-on-a-chip. provides platform accelerated software development product evaluation. includes printed circuit board with typical configuration BCM5690s connected back-to-back integrated deliver copper ports optional fiber ports GBICs. comes with Wind River VxWorks real-time operating system, 19-inch rack-mount chassis with Compact backplane power supply, latest version Broadcom driver source code. Table lists SDKs that available StrataXGS products. Part Number Legend: Switch Development Reference Design Stackable Upgrade Board only chassis power supply)
Table StrataXGS Part Numbers Part Number BCM95670K8 BCM95670K8U BCM95690K24 BCM95690K24S BCM95690K24U BCM95690K24SU BCM95690R24 BCM95690R24S BCM95690R24U BCM95690R48S BCM95690R48SU BCM95691K12 BCM95691K12U Description Switch Fabric Development with HiGig ports Switch Fabric Development with HiGig ports Upgrade Switch Development with 24GE ports Switch Development with 24GE 2HiGig ports Switch Development with 24GE Upgrade Switch Development with 24GE 2HiGig ports Upgrade Switch Reference Design with 24GE Ports Stackable Switch Reference Design with 24GE Ports Stackable Switch Reference Design with 24GE Ports Upgrade Stackable Switch Reference Design with 48GE Ports Stackable Switch Reference Design with 48GE Ports Upgrade Switch Development with 12GE ports Switch Development with 12GE ports Upgrade
Note: SDKs available with standard PowerPC 8240 processor. 32334 PowerPC 8245 processor available with longer lead time.
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BCM567x/BCM569x
SAMPLE SYSTEM CONFIGURATIONS
What follows just sample switch designs that leverage StrataXGS architecture.
Flash Memory DRAM
DRAM
HiGig BCM5690
BCM5690
BCM8002 BCM8002
BCM1250 BCM5444 BCM5444 BCM5444 BCM5444 BCM5444 BCM5444
BCM1250
External port RJ-45 port RJ-45
External
Advanced Function Module
Figure Fixed 24-port Switch with Optional Advanced Function Module
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BCM567x/BCM569x
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06/27/02
Active Stock Modules
BCM5671
Flash Memory DRAM
BCM5690
BCM5690
DRAM
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
port RJ-45
port RJ-45
Optional Fiber Modules
Figure 24-port Switch with Active Stack Module
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BCM567x/BCM569x
BCM5670
HiGig
DRAM
Flash Memory DRAM
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
BCM5690
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
BCM5444
Gigabit Ethernet ports
Figure 48-port Nonblocking Switch
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SUMMARY CONCLUSION
Businesses become increasingly reliant Web-based applications automate their businesses reach customers business partners across intranets, extranets, Internet. Network storage, VoIP, other multimedia applications driving need much higher connectivity speeds desktop. Broadcom StrataXGS Switch Architecture enables switch vendors meet enterprise customers' high-speed connectivity needs with modular, integrated components that serve simple building blocks. components, with high port counts rich feature sets, keep system design assembly simple, which lowers assembly time costs, while providing designers with high degree flexibility form factors they choose build features they choose activate. StrataXGS architecture allows same building blocks creating different types systems. backward-compatible with proven StrataSwitch chip architecture Broadcom development that components expertise reused. This hastens switch vendor's time market lowers resource requirements/costs. Using combinations Broadcom BCM5670 BCM5671 high-performance switching fabrics BCM5690 BCM5691 switching chips, designers scale their systems support hundreds 10-GE ports, configured variety form factors meet needs their target applications.
Broadcom Corporation
16215 Alton Parkway P.O. 57013 Irvine, California 92619-7013 Phone: 949-450-8700 Fax: 949-450-8710
Broadcom® Corporation reserves right make changes without further notice products data herein improve reliability, function, design. Information furnished Broadcom Corporation believed accurate reliable. However, Broadcom Corporation does assume liability arising application this information, application product circuit described herein, neither does convey license under patent rights rights others.
Document 567x_569x-WP100-R

06/27/02 16215 Alton Parkway P.O. 57013 Irvine, Califor

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