Siemens DataNET Hub (DNH) user manual DataNET Hub Hierarchy, Ethernet Bridging

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Overview, Continued

DataNET Hub Hierarchy

A network of DataNET hubs forms a tree-like hierarchy. A DNH may connect to as many as eight “down-stream” devices (Maxum Analyzers or Advance Hub Uplink port). Each down-stream DNH, in turn, connects to another eight, and so on. No architectural limit is placed on the depth of the DataNET hub hierarchy. In practice, propagation time considera- tions and hub loading should allow hierarchies at least six or seven lay- ers deep without incurring excessive timing delays.

Figure 1-2. DataNET Hub Hierarchy

DataNET hub

G

DataNET hub

Ethernet

DataNET hub

DataNET hub

DataNET hub
DataNET hub	DataNET hub

DataNET hub

Ethernet Bridging

Figure 1-3 illustrates two separate trees of DataNET hubs that share an Ethernet segment.

A hub can also connect to-and-from an Ethernet device or an Ethernet compatible Advance Network Gateway (ANG) unit or to and from a non- redundant Ethernet connection. A tree of DataNET hubs can function as an Ethernet bridge, transparently connecting all the Ethernet segments that are attached at any point on the hierarchy. The DataNET hub soft- ware does not implement any software protocols (e.g. IEEE 802.1 span- ning tree) to prevent routing loops. Thus, each tree of DataNET hubs may connect to any Ethernet segment at exactly one point. Multiple Da- taNET trees may share Ethernet links.

Figure 1-3. Ethernet

Bridging

	Ethernet	DataNET hub
	Ethernet	Ethernet
		Ethernet

DataNET hub

	DataNET hub
	DataNET hub
Ethernet	DataNET hub
Ethernet
	DataNET hub

DataNET hub

Ethernet

DataNET hub

DataNET hub

2000585-001

Introduction • 3

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Contents December User’s Manual 2000585-001 Advance DataNET Hub DNHCopyright Notice Table of Contents Table of Contents Preface Audience & Purpose Chapter ContentsGetting Help Before You Call Technical SupportSafety Practices and Precautions Safety Practices and Precautions Ports OverviewDescription Dual Hub ModulesAdvance Communi- cations System Package ConfigurationsEthernet Bridging DataNET Hub HierarchyDNH and Maxum Com Boards DataNET Hub OperationDNH Links Definitions DataNET SwitchingTransparency DataNET Hub Specifications DataNET Hub Specifications DataNET Hub Specifications DataNET Cable Cable Type Vendors & P/N Installation NotesCommunication ComparisonsDataNET Hub Specifications DataNET Hub Specifications Zone 1 Wall Mount Dimension Table Description Metric InchesZone 1 Wall Mount Dimension Table Page Introduction Installation OverviewDescription Receipt of DNH Unpacking Reporting Damage Unpacking and InspectionInstructions Package Configurations Wall Mounting Wall or Rack Mounting InstallationRack Mounting CE Installations Wiring Requirements Description Wiring of Power to DataNET HUB Site Wiring RequirementsRecommended DataNET Cable Cable Type Vendors & P/N Installation NotesDataNET Channels DataNET Fiber Optic Cable Connections Copper Wire Site RequirementsCE Installations NEC Div 2 or Non Hazardous Areas Ethernet Communica- tion Links CE Installation Kit Instructions CE InstallationsCE Installations Types of Connections Wiring ConnectionsBefore You Begin Step Action AC Power Mains ConnectionsDNH Power Supply Installation Note Before You BeginInstall 15-Ampere circuit breakers, disconnect switches or AC Power Mains Connections Description Hubs DataNET Copper ConnectionsPort Connections DataNET Ports+ Important Cable Impedance SettingsMaster Port Connectors TB15 TB18 Signal Equalizer Board Downlink Wiring withoutDescription Instructions DataNET Hub Signal Equalizer BoardRepeat the procedure for each connected port on the Hub Calculation One Equalizer Board SettingsSample Calculations RecommendedExample Comparing SignalsOption 1. Connection Point Option 2. Connection Point View MeasurementsInstructions & Examples Step Action + 2.1 dB RX & TX Connections DataNET Fiber Optic ConnectionsDataNET Fiber Optic Coupler Fiber Optic Cable Type Port Connections Page Active Ethernet Port Ethernet ConnectionsPin No MDI Function 10BASE-T Cable RequirementsTasks Check Overview Command Line Definitions Important ChecklistIntroduction Chapter Preview Configuring Your PC Learning Hint Setting Network AddressConfiguring Your PC Click Terminal Settings button Configuring Your PC Getting Started Before You Begin Password ProtectionEstablishing a Connection How to Change Password FormatHow to Log Out How to Log OnRemote Connection Log On At the prompt type login password IP AddressSetting Network Address Config address ip Available IP Addresses IP Address How to Assign an IP AddressAssigning an IP Address OverviewFirmware Updates Click on Send Text File At the Local prompt type config address etherenetMAC Address Con- figuration For monitoring the DNH operation System Status LEDsBoard Status LEDs Startup LED Status Advance DataNET Hub Communication boards have status LEDsGreen Normal LED Red Fault LEDYellow Warn LED Blink Codes Hub Port LEDsLED Ethernet Port LEDs Cross Link StatusCabling errors Example TroubleshootingConfiguration Conflicts Errors Configuration ParameterInstructions Signal Quality ProblemsTroubleshooting Description Unique Commands Command DescriptionsTimeout off Password passwordReset Timeout onConfig display Command Config netmask Command Config address ip command Config device id CommandConfig iproute Del Command Display Command Example local display links Display links CommandDownload Command Dn setuptime Events Command Dn CommandCommand Descriptions Dn module on dn module off Help Command List Command Command DescriptionLogin Command Examplelocal netstat dn clear Logout Command Netstat CommandPort Command Test Command Timeout Command Trace Command Validation timeout Command Captured frames Verbose CommandParts Catalog Overview How to Place an OrderPart Description Ordering Number Available PartsAvailable Parts