Jan 14, 1998

Product OverviewProduct OverviewPART IIPART II

Product OverviewProduct OverviewPART IIPART II

ModulesATM ServicesPizzaSwitch

Theory of Operation

ASM-155-F one or two SC connectorized fiber ports that support one or two SC connectorized fiber ports that support

OC-3 connections at 155 MbpsOC-3 connections at 155 Mbps single mode or multimode versions availablesingle mode or multimode versions available

ASM-155-C one or two RJ-45 ports that support 155 Mbps one or two RJ-45 ports that support 155 Mbps

connections over Cat. 5 cableconnections over Cat. 5 cable

S DASM

S DASM

ATM network Access Switching ModulesATM network Access Switching Modules

ASM-DS3 one or two BNC connectorized coaxial cable ports to one or two BNC connectorized coaxial cable ports to

support connections at 44.736 Mbpssupport connections at 44.736 Mbps

ASM-E-3 one or two BNC connectorized coaxial cable ports to one or two BNC connectorized coaxial cable ports to

support connections at 34.368 Mbpssupport connections at 34.368 Mbps

S D

OK1

OK2

ASM

OUT

BNC

INAC

TL IN

KAISYEL

RED

ALARM O

UT

BNC

INAC

TLI

NK

AISYELRE

D

ALARM

ATM network Access Switching ModulesATM network Access Switching Modules

T1/E1Ports

ATM OC3UplinkPort

S DASM

UniversalSerialPorts

ASM with circuit emulation (ASM-CE)ASM with circuit emulation (ASM-CE)

ASM-CE with OC3 uplink:

S DASM

ASM-CE with OC3 or DS3 uplinkASM-CE with OC3 or DS3 uplink

1 ASM-CE OC3 uplink multimode or single mode fiber standard connectormultimode or single mode fiber standard connector 155 megabits per second155 megabits per second

2 T1/E1 circuit emulation services ports RJ-45 connectorRJ-45 connector DSX-1 short-haul interfaceDSX-1 short-haul interface

2 universal serial ports layer 1 transport of legacy synchronous serial devices using layer 1 transport of legacy synchronous serial devices using

unstructured CESunstructured CES universal port supports RS-232, V.35, RS-449, RS-530 and universal port supports RS-232, V.35, RS-449, RS-530 and

X.21 selectable via cableX.21 selectable via cable

AAL5SAR

AAL1SAR

MUX

2 serial portsDS3/E3/OC3 uplink 2 T1/E1 ports

To VBUS

ASM-CE sub-modules functional diagram ASM-CE sub-modules functional diagram

Combination of an HSM2 and two sub-modules one sub-module is the ATM uplink moduleone sub-module is the ATM uplink module second sub-module is the ATM-CBR (access) sub-second sub-module is the ATM-CBR (access) sub-

module module AAL1 ATM cells access the uplink module Utopia bus AAL1 ATM cells access the uplink module Utopia bus

via a cross-board connector via a cross-board connector ATM uplink module multiplexes AAL5 and AAL1 cells to ATM uplink module multiplexes AAL5 and AAL1 cells to

the ATM uplinkthe ATM uplink

S DW SM

Wide Area Network (WAN) Switching ModuleWide Area Network (WAN) Switching Module

WSM-4-S and -8-S four or eight ports designed to connect to the wide area four or eight ports designed to connect to the wide area

via frame relay at speeds from 9.6K to 2.048 Mbpsvia frame relay at speeds from 9.6K to 2.048 Mbps supports STAC hardware compression, three types of supports STAC hardware compression, three types of

clocking, and all three major DLCMI management clocking, and all three major DLCMI management protocolsprotocols

interfaces seamlessly to RS-449, RS-232, V.35, RS-530, interfaces seamlessly to RS-449, RS-232, V.35, RS-530, and V.X21/X26 both DTE and DCEand V.X21/X26 both DTE and DCE

WSM-BRI-SC-1W (available in 2 port version also) 1 or 2 serial port and 1 or 2 ISDN port - U and ST 1 or 2 serial port and 1 or 2 ISDN port - U and ST

interface interface supports STAC hardware compression, three types of supports STAC hardware compression, three types of

clocking, and all three major DLCMI management clocking, and all three major DLCMI management protocolsprotocols

interfaces seamlessly to RS-449, RS-232, V.35, RS-530, interfaces seamlessly to RS-449, RS-232, V.35, RS-530, and V.X21/X26 both DTE and DCE and V.X21/X26 both DTE and DCE

Basic Rate Access (BRA) - residential or small office 2B+D: 2 B channels (64K) + 1 D channel (16K)2B+D: 2 B channels (64K) + 1 D channel (16K)

S DASM

ISDN WAN moduleISDN WAN module

CSM-155-8 (single mode or multimode) eight SC connectorized fiber ports that support OC-3 eight SC connectorized fiber ports that support OC-3

connections at 155 Mbpsconnections at 155 Mbps

CSM-155-8C (copper) eight RJ-45 connectorized copper ports that support eight RJ-45 connectorized copper ports that support

OC-3 connections at 155 MbpsOC-3 connections at 155 Mbps

S DCSM -15 5

S DCSM -15 5

ATM Network Cell Switching ModulesATM Network Cell Switching Modules

ATM Network Cell Switching ModulesATM Network Cell Switching Modules

CSM-155-8 (single mode or multimode) two SC connectorized fiber ports that support OC-12 two SC connectorized fiber ports that support OC-12

connections at 622 Mbpsconnections at 622 Mbps

S DCSM -62 2

CSM-A25-12W 12 RJ-45 connector ports that support 25 Mbps over 12 RJ-45 connector ports that support 25 Mbps over

UTP category 5 cablingUTP category 5 cabling

CSM-A25-24W 24 RJ-45 connector ports that support 25 Mbps over 24 RJ-45 connector ports that support 25 Mbps over

UTP category 5 cablingUTP category 5 cabling

ATM switch solutionsATM switch solutions

S DCSM -A25

S DCSM -A25

A

B

S D

OK1

CSM -U

OK2

S D

TX RX

1

TX RX

2

1 2

REC

LNK

ACT

SD

1 2 2X1X

S D

1X 2X 3X 4X

CSM-U overviewCSM-U overview

CSM-U provides mix & match interface capabilities of ATM provides mix & match interface capabilities of ATM

switching and Circuit Emulation Services (CES) on a switching and Circuit Emulation Services (CES) on a single modulesingle module

holds up to three sub-modules to provide multiple port holds up to three sub-modules to provide multiple port typestypes

CSM-U featuresCSM-U features onboard interface to X-Cell bus architectureonboard interface to X-Cell bus architecture 1 Xylan X-Cell fabric ASIC1 Xylan X-Cell fabric ASIC 3 Xylan I/O processor ASICs (one for each expansion sub-3 Xylan I/O processor ASICs (one for each expansion sub-

module)module)

CSM-U module featuresCSM-U module features

Mix and match any combination of up to three CSM-U expansion sub-modules (24 available, Release 3.2)

4 port DS1 ATM4 port DS1 ATM 4 long-haul DS1 RJ-45 (built out as T1 or E1) 4 long-haul DS1 RJ-45 (built out as T1 or E1)

ATM UNI portsATM UNI ports

4 port DS1 CE4 port DS1 CE 4 long-haul DS1 RJ-45 (T1 or E1) CBR ports4 long-haul DS1 RJ-45 (T1 or E1) CBR ports converts full DS1(unstructured) or NxDS0 bundles converts full DS1(unstructured) or NxDS0 bundles

(structured) to ATM cells via ATM adaptation layer 1 (structured) to ATM cells via ATM adaptation layer 1 (AAL1) to Xylan cell bus(AAL1) to Xylan cell bus

2 port DS3 ATM (built out as T3 or E3)2 port DS3 ATM (built out as T3 or E3)

2 port OC3 ATM multimode or single mode fiber2 port OC3 ATM multimode or single mode fiber

S D

1X 2X 3X 4X

S D

S D

TX RX

TX RX

S D

1X 2X 3X 4X

Fabric

IOP IOP IOP

ATM

Exp.

Card

ATM

Exp.

Card

ATM

Exp.

Card

CSM-U base functional diagramCSM-U base functional diagram

Base components cell switching fabriccell switching fabric 3 IOPs for fabric to 3 IOPs for fabric to

Utopia interfaceUtopia interface

Expansion cards

WAN/ATM (several WAN/ATM (several types)types)

Utopia and memory Utopia and memory interface to CSM-U interface to CSM-U motherboardmotherboard

The Frame Cell Switching ModuleThe Frame Cell Switching Module

Features internal link connecting the frame bus and cell matrixinternal link connecting the frame bus and cell matrix supports comprehensive LAN to ATM internetworkingsupports comprehensive LAN to ATM internetworking performs the Segmentation and Reassembly function performs the Segmentation and Reassembly function

(SAR)(SAR)

S DFCSM

X-Cell system architectureX-Cell system architecture

Single stage, non-blocking, fully distributed switch fabric

each I/O module is an ATM switch each I/O module is an ATM switch no single point of failure; low entry costno single point of failure; low entry cost

Switch fabric scales from 2.0 to 13.2 Gbps up to 64 OC-3c / STM-1up to 64 OC-3c / STM-1 up to 16 OC-12c / STM-4cup to 16 OC-12c / STM-4c

13.2Gbps Cell Matrix

Up to 8 CSMs per chassis (42 custom ASICs)Up to 8 CSMs per chassis (42 custom ASICs)

Input PortsInput Ports Output PortsOutput Ports

Fabric (13.2G)Fabric (13.2G)

Buffer Memory (2.048M Cells)Buffer Memory (2.048M Cells)

X-Cell: advanced fabric architectureX-Cell: advanced fabric architecture

Distributed Input Buffered with Output Control (DIBOC) logically identical to output buffered switchlogically identical to output buffered switch

Distributed Input Buffering Distributed Input Buffering with Output Controlwith Output Control

816 32 64

OutputOutputBufferingBuffering

5,000

10,000

15,000

20,000

25,000

# of 155M ATM Ports# of 155M ATM Ports

Per-port cell buffer requirement to handle 1 msec burst (about 12 Ethernet frames / 365 cells) from each input

Per-port cell buffer requirement to handle 1 msec burst (about 12 Ethernet frames / 365 cells) from each input

X-Cell: buffer managementX-Cell: buffer management

Characteristics dynamic input buffered with output control (DIBOC)dynamic input buffered with output control (DIBOC) 6 classes of service, i.e., CBR PRS, CBR, rt-VBR, nrt-VBR, ABR, UBR6 classes of service, i.e., CBR PRS, CBR, rt-VBR, nrt-VBR, ABR, UBR very large cell buffers, e.g., 128K per OC-12c/STM-4c portvery large cell buffers, e.g., 128K per OC-12c/STM-4c port thresholds and discarding mechanisms, e.g., EPD, PPD and REDthresholds and discarding mechanisms, e.g., EPD, PPD and RED

Implementation integrated into the IOP ASIC (patent pending)integrated into the IOP ASIC (patent pending)

Fab

ric

cap

acit

y (G

bp

s)

# of OC-3c/STM-1 ports

Scalable fabric capacityScalable fabric capacity

System scales from 2Gbps to 13.2Gbps in 1.6Gbps at a time

one CSM (1.6Gbps) plus MPM (400Mbps) to startone CSM (1.6Gbps) plus MPM (400Mbps) to start each CSM adds an additional 1.6Gbpseach CSM adds an additional 1.6Gbps

Lower entry cost

LANE Server(LES)

LANE Client(LEC)

LANE Client(LEC)

ATM Host LAN Switch

ControlDirectVCC

ControlDistribute

VCC

ControlDirectVCC

ConfigurationDirectVCC

ConfigurationDirectVCC

LANE Configuration Server(LECS)

ATM servicesATM services

LAN Emulation (LANE) allow the emulation of legacy LANs over the connection-allow the emulation of legacy LANs over the connection-

oriented ATM service by providing control circuitsoriented ATM service by providing control circuits

Slot 3Port 7GP 1

Slot 5Port 8GP 1

Slot 9Port 8GP 2

Slot 2Port 5GP 3

Slot 3Port 2GP 2

Slot 3Port 7GP 1

Slot 2Port 7GP 3

Slot 6Port 7GP 3

VCI 101, 102, & 103

VCI 101,102, & 103

ATM servicesATM services

Point-to-point bridging up to 16 bridging services per ATM port over separate up to 16 bridging services per ATM port over separate

VCs VCs

ATM servicesATM services

Slot 3Port 7GP 1

Slot 5Port 8GP 1

Slot 9Port 8GP 2

Slot 2Port 5GP 3

Slot 3Port 2GP 2

Slot 3Port 7GP 1

Slot 2Port 7GP 3

Slot 6Port 7GP 3

ATM trunking multiple groups are “trunked” over a single VCmultiple groups are “trunked” over a single VC

VCI 102

VCI 102

Broadcast OutVCC

Broadcast In 2VCC

Broadcast In 3VCC

Data Direct2 VCC

Data Direct3 VCC

ATM servicesATM services

VLAN clusters (XLANE) provides a LANE-like service without the need for LAN provides a LANE-like service without the need for LAN

Emulation Services (LES)Emulation Services (LES)

IP-based device

IP-based devices IP-based devices

ATM servicesATM services

Classical IP (RFC1577) allows for routing of IP over ATMallows for routing of IP over ATM

R

ATM

R

OmniMSSOmniMSS

LANE services, routing a powerful, high a powerful, high

performance LAN-to-ATM performance LAN-to-ATM internetworking serverinternetworking server

delivers integrated LAN delivers integrated LAN Emulation and classical IP Emulation and classical IP services, and route server services, and route server capabilities for IP, IPX and capabilities for IP, IPX and AppleTalkAppleTalk

provides LES, LECS, and provides LES, LECS, and BUS services, and BUS services, and broadcast control broadcast control managementmanagement

redundant LANE services redundant LANE services may be configuredmay be configured

OmniMSSOmniMSS

Configurations 4 versions available4 versions available combinations depend on combinations depend on

# of ATM uplinks # of ATM uplinks single or multimode fibersingle or multimode fiber

OmniServer versions OmniServer-M1: one ATM OmniServer-M1: one ATM

multimode uplinkmultimode uplink OmniServer-M2 : two ATM OmniServer-M2 : two ATM

multimode uplinksmultimode uplinks OmniServer-S1: one ATM OmniServer-S1: one ATM

single mode uplinksingle mode uplink OmniServer -S2 : two ATM OmniServer -S2 : two ATM

single mode uplinkssingle mode uplinks

A hard drive is required for each (must be bought separately)

ATM LANE Service Module (LSM)ATM LANE Service Module (LSM)

LANE services integrated on the Management Processor Module (MPM)

LES-BUSLES-BUS LECSLECS LECS interfaceLECS interface ATM managerATM manager Connection ManagerConnection Manager NI driver and BUS data forwarding engineNI driver and BUS data forwarding engine

ILMI MIBILMI MIB

LECS_1LECS_1

Primary Primary LES/BUSLES/BUS

Backup Backup LES/BUSLES/BUS

Redundancy VCCRedundancy VCC

LECLEC

LECS_2LECS_2

LECS_1LECS_1

LECS_2LECS_2

ATM LANE Service Module (LSM)ATM LANE Service Module (LSM)

LES/BUS redundancy

ATM LANE Service Module (LSM)ATM LANE Service Module (LSM)

Design constraints one LECS per OmniSwitchone LECS per OmniSwitch each LES-BUS is associated with a single physical ATMeach LES-BUS is associated with a single physical ATM interface (ASM or FCSM)interface (ASM or FCSM) maximum of 128 parties on a p2mp connectionmaximum of 128 parties on a p2mp connection maximum of 64 components per ATM physical portmaximum of 64 components per ATM physical port 4MB of flash memory4MB of flash memory no broadcast control management like the MSSno broadcast control management like the MSS

ATM LANE Service Module (LSM)ATM LANE Service Module (LSM)

VCC resources constraints 1024 active VCCs - limit of LECs joined1024 active VCCs - limit of LECs joined 1024 p2mp connections - limit of LES-BUS instances1024 p2mp connections - limit of LES-BUS instances

Guideline: maximum of 80 LECS

each ASM using LANE can support 16 LECSeach ASM using LANE can support 16 LECS each group needs 1 LECeach group needs 1 LEC example: 8 groups per OmniSwitch X 8 OmniSwitches example: 8 groups per OmniSwitch X 8 OmniSwitches

will use 64 LECswill use 64 LECs

Pizza10 12 front-panel 10BaseT (RJ-45) ports12 front-panel 10BaseT (RJ-45) ports

Pizza10U mix-and-match up to eight front-panel daughter cardsmix-and-match up to eight front-panel daughter cards

S D

C O L -

A C T -

S T A -

1 2 3 4 5 6 7 8 9 1 0 1 1 1 2

H S 1 H S 2 O K 1 O K 2 P S

CONSOLE

PizzaSwitch

X Y L A N

S D

H S1 H S2 OK1 O K2 PS

C O N SOLE

X Y L A N

1 2 3 4 5 6 7 8CO L -

A C T -

S T A -

PizzaSw itch

Tx RxTx Rx

PizzaSwitchPizzaSwitch

PizzaSwitchPizzaSwitch

Two rear-mounted sub-modules: up to two rear-mounted, high-speed sub-modules for up to two rear-mounted, high-speed sub-modules for

FDDI, CDDI, ATM, frame relay and Fast EthernetFDDI, CDDI, ATM, frame relay and Fast Ethernet

S D

SD

RED YEL FERFALARM

CERR ACT LINK

SD

RED YEL FERFALARM

CERR ACT LINK RX TX

SD

BYPASSLINKACTWPA

THRU

RGOPWPB

RX TX RX TX

SD

RED YEL AISALARM

ACT LINK

OUT

IN

BNC

SD

RNG OPACT

RINGA LK A B LK B C LK C D LK D

S D

R X TX

S D

L IN K

A C T

W A N

TH R U

R EC V

W A N

B YP AS S

S D

S D

FDDIFDDIRR

FDDI campus networks using PizzaSwitchesFDDI campus networks using PizzaSwitches

Each user has: a dedicated Ethernet linka dedicated Ethernet link CDDI server accessCDDI server access FDDI backbone accessFDDI backbone access

RR

ATMATM

X-Cell

ATM backbone networks using PizzaSwitchesATM backbone networks using PizzaSwitches

Each user has: a dedicated Ethernet linka dedicated Ethernet link 100BaseTX server access100BaseTX server access ATM OC3 backbone accessATM OC3 backbone access

Capabilities and features one group will be bridged while additional groups are one group will be bridged while additional groups are

simultaneously trunked over the same physical portsimultaneously trunked over the same physical port

FDDI moduleFDDI module

Slot 2Port 5GP 3

XYLAN

PizzaPort

1 3 5 7 9 11

2 4 6 8 10 12

ABC

LINKSTATUSBANK A1 A2

1xA B C

3x 5x 7x 9x 11x 1x 3x 5x 7x 9x 11x 1x 3x 5x 7x 9x 11x

2x 4x 6x 8x 10x 12x 2x 4x 6x 8x 10x 12x 2x 4x 6x 8x 10x 12x XYLAN

PizzaPort

PizzaPortPizzaPort

Multi-segment port assignment concentrator four Ethernet segmentsfour Ethernet segments 36 10Base-T ports36 10Base-T ports 2 optional 10Base-FL ports2 optional 10Base-FL ports

PizzaPort featuresPizzaPort features

Four internal repeated segments assign any port to any segmentassign any port to any segment no internal connection between segmentsno internal connection between segments

LAN 1LAN 2LAN 3LAN 4

Front panel portsFront panel ports

LAN 1

LAN 2

LAN 3

PizzaSwitch

PizzaPort

PizzaPort

PizzaPort

high-speed uplink

PizzaPort featuresPizzaPort features

Network LAN switching used with PizzaSwitch or OmniSwitchused with PizzaSwitch or OmniSwitch

The OmniSwitch IntelligenceThe OmniSwitch IntelligenceThe OmniSwitch IntelligenceThe OmniSwitch Intelligence

Theory of Operation

Xylan features any-to-any switchingXylan features any-to-any switching

10M Ethernet

100M Ethernet

Token Ring

FDDI

CDDI

Frame Relay

25M ATM

34/45M ATM

155M ATM

622M ATM10

M E

ther

net

100M

Eth

erne

t

Toke

n R

ing

FDD

I

CD

DI

Fram

e R

elay

25M

ATM

34/4

5M A

TM

155M

ATM

622M

ATM

Routers can route from any port to any other…

……why shouldn’t switches switch from why shouldn’t switches switch from any port to any other?any port to any other?

OmniSwitch backplane architectureOmniSwitch backplane architecture

120Mbps Mgmt. Bus

Cell SwitchingModule

Cell SwitchingModule

Frame SwitchingModule

Frame SwitchingModule Mgmt. Processor

Firewall

HardwareRtg. Engine

Frame/CellSwitching Module

OC-12 SAR

LEC(s)

13.2Gbps Cell Matrix

960Mbps Frame Bus (VBUS)

• 960 Mbit data bus

SparcLiteprocessor

Switching ASICs CAM(s)

• Control bus

• MPM communication bus

• Cell bus Cell bus 13.2 Gbps!13.2 Gbps!

Switching module hardware componentsSwitching module hardware components

MPM II

VirtualBridge 1

(VBUS)

NSM NSM

Learning &Station

ParametersRouting

Parse

& Drivers

Management

Agent & Protocols

. . .Virtual

Bridge 2Virtual

Bridge 1Virtual

Bridge n

OmniSwitch architectureOmniSwitch architecture

All modules are interconnected by the data bus the module interconnection uses a distributed memory the module interconnection uses a distributed memory

architecture based around architecture based around FASTFAST Video RAM Video RAM

(VBUS)(VBUS)

Network switching module architectureNetwork switching module architecture

VB(i)

NI DriverHW & SW

NI DriverHW & SW

VBus DriverHW & SW

Source

Destination

VBus DriverHW & SW

VB(i)

TranslationFunction

CAM

NSM

VB(i)

NI DriverHW & SW

NI DriverHW & SW

VBus DriverHW & SW

Source

Destination

VBus DriverHW & SW

VB(i)

TranslationFunction

CAM

NSM

MPM II

TX MEMRX MEM

CPU Flash DRAM

CAM

ESM

TX MEMRX MEM

CAM

ESE

MAC MAC MAC. . .

HSMVSE

TX MEMRX MEM

CPU

CAM

CPU

I/O Sub Module

SBUS

I/O Sub Module

VBUSVBUS

Control busControl bus

VSE

CPU

VSE

OmniSwitch bus architectureOmniSwitch bus architecture

The CPUs on all modules areinterconnectedby the Control bus

Extensive ASIC developmentExtensive ASIC development

IOP ASICs

Fabric ASICs

IOP/Fabric ASICs each IOP has a dedicated 400 Mbps BUS to forward received cells each IOP has a dedicated 400 Mbps BUS to forward received cells

to destination port(s); (80Mhz clock x 5 bit parallel bus = 400Mbps)to destination port(s); (80Mhz clock x 5 bit parallel bus = 400Mbps) fabric ASIC listens on all 33 busses to receive cells on behalf of fabric ASIC listens on all 33 busses to receive cells on behalf of

local IOPslocal IOPs an OC-12c/STM-4c interface has two IOPs and two dedicated 400 an OC-12c/STM-4c interface has two IOPs and two dedicated 400

Mbps bussesMbps busses