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50 SunFDDI/P1.0 AdapterUser’sGuide—May1997
6
FDDINetworkModel
FDDI provides high-performance, multistation networking at data transfer
rates of up to 100 Mbps. It is based on a Token-Ring network architecture, and
provides communication over optical fiber or copper twisted-pair connections.
The ANSI/FDDI specifications define a network model that consists of the
following components:
• Physical Medium Dependent (PMD) Layer
• Physical (PHY) Layer
• Medium Access Control (MAC) Layer
• Station Management (SMT) Protocol
Figure 6-1 shows the organization of these components, and their relationship
with other network protocols that use them.
Figure 6-1 FDDI Architectural Model
OSI TCP/IP
DLPI interface V2 / BSD ifnet
LLC/Subnetwork Access Protocol (SNAP)
Media Access Control (MAC) layer
Physical (PHY) Layer
Physical medium dependent (PMD) layer
User space
Kernel space
Hardware
Station Management
(SMT)
- SunFDDI/P 1
- 1.0AdapterUser’sGuide 1
- FCCClassANotice 3
- FCCClassBNotice 3
- Declaration of Conformity 5
- Contents 7
- Contents ix 9
- Contents xi 11
- Contents xiii 13
- HowthisBookisOrganized 19
- UNIXCommands 21
- TypographicConventions 22
- ShellPrompts 22
- RelatedDocuments 23
- OrderingSunDocuments 23
- GettingHelp 24
- SunWelcomesYourComments 24
- SunFDDI/POverview 27
- FDDIConformance 28
- HardwareInstallation 29
- DeviceInstancesandDeviceNames 30
- InstallationItems 30
- ConnectingFiberOpticCables 31
- MIC-to-MICCoupler 33
- CleaningtheFiberOpticCable 33
- HardwareInstallation 9 35
- InstallingSunFDDI/PSoftware 37
- InstallationRequirements 38
- # mkdir /cdrom/sunfddip_1_0 39
- ▼ To Finish the Installation 43
- ▼ To Check the Installation 44
- ▼ Unloading Drivers 45
- ▼ To Use pf_install_agents 46
- RemovingSunFDDI/P 48
- ImprovingNetworkPerformance 49
- HighPerformanceFDDINetworks 50
- RingLatencyImprovement 50
- DataThroughputImprovement 51
- PerformanceAcrossBridges 51
- TargetTokenRotationTime(TTRT) 52
- ImprovingPerformance 53
- ▼ To Tune the Low Water Mark 54
- TuningtheSocketOptions 55
- MTUPathDiscovery 56
- TroubleshootingandDiagnostics 59
- TroubleshootingChecklist 60
- ▼ To Check the IP Addresses 62
- ▼ To Check the IP Routing 63
- ▼ To Check the SMT Traffic 64
- SolvingCommonProblems 65
- SunFDDINetworks 73
- FDDINetworkArchitecture 75
- FDDINetworkModel 76
- Physical(PHY)Layer 77
- MediaAccessControl(MAC)Layer 78
- StationManagement(SMT)Layer 78
- • Gather network statistics 79
- • Generate status reports 79
- FDDIStations 82
- • Dual-attached station (DAS) 82
- Dual-AttachedStation(DAS) 83
- FDDIConcentrators 84
- FDDIFailureRecovery 86
- OpticalBypassSwitches 88
- FDDIRingOperation 91
- FDDIPerformance 92
- • Network load 93
- • Network efficiency 93
- • Bus architecture 93
- FDDINetworkTopologies 95
- BasicDual-RingNetwork 96
- StandaloneConcentrator 98
- ConcentratorswithDual-Homing 100
- TreeofConcentrators 101
- Advantages 102
- RingofTrees 103
- Disadvantages 104
- MixedFDDI/EthernetNetworks 105
- • Route 1 (across FDDI link): 108
- FDDINetworkTopologies 83 109
- UsingtheSunFDDI 111
- NetworkUtilities 111
- <mac_address> 112
- InterpretingLocalStatistics 115
- • MAC availability 116
- • Connection initialization 117
- • Maintenance support 117
- Ring_OP (RingOperational) 118
- XmitP (Transmit Packets) 118
- ExampleLocalStatistics 119
- Phy(PhysicalConnection) 121
- Frame(FramesReceived) 121
- Error(ErrorFrames) 121
- Lost(LostFrames) 122
- SA(StationAddress) 122
- UNA(UpstreamNeighbor Address) 122
- ExampleNeighborStatistics 123
- SMTFrameClassesandTypes 126
- FilteringOutputfrompf_smtmon 127
- ManagingFDDIStations 129
- UsingSunNetManager 129
- # /opt/SUNWconn/bin/snm —i 135
- InterpretingTrapsandErrors 140
- MACAddressFormats 143
- • Canonical format 143
- • Ring format 143
- DevelopingApplicationsthat 145
- RunoverSunFDDI/P 145
- Data link service user 147
- Data link service provider 147
- DLPIAddressing 148
- 0 Not supported 149
- SettingUpServers 151
- % /usr/bin/df -k /export 152
- ▼ To Set Up a Server 153
- ▼ To Update the NIS Server 158
- ▼ To Boot a Diskless Client 159
- FrequentlyAskedQuestionsAbout 161
- Glossary 167
- Glossary 143 169
- Glossary 145 171
- Numerics 173
- Reader Comment Card 181
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