Asante Technologies 1012 manual If the Main Hub Goes Down, If a Link Goes Down to the Main Hub

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Chapter 2 — Connecting to the Network

In Figure 2-8, there are three AsantéHubs and an AsantéBridge in the network.These devices have workstations, printers, etc. con- nected to their twelve front panel ports.These hubs (and their cli- ents) communicate with each other and to devices on the main network backbone through the main hub (shown as the AsantéBridge in the illustration).They use 10T cabling to connect each of their 3in1 Uplink ports to a front panel port on the main hub.The three hubs are also connected to the main network back- bone's BNC (thin Ethernet) cabling. Since Auto-sense checks for cabling using the priority sequence of AUI, then 10T, and ﬁnally, if neither AUI nor 10T cabling exists, BNC, the hubs will communi- cate through their 3in1 ports using the 10T media rather than the BNC.The main hub's 3in1 Uplink uses its BNC port to connect to the main backbone.

If the Main Hub Goes Down

If the main hub goes down, the other three hubs' 3in1 Uplink ports will detect that their 10T links have failed when they per- form a Link Integrity Test.This causes them to switch over to the BNC cabling of the main network backbone, thus allowing them continued communication with each other and with devices on the main backbone.

If a Link Goes Down to the Main Hub

If the main hub is up and running, but one or more of the other three hubs has its 10T link to the main hub go down, the follow- ing would occur.A hub losing its 10T link to the main hub would detect such a problem when it performed a Link Integrity Test for its 10T connection on its 3in1 Uplink port.When the 10T link failed, that hub would then switch to communicating through its 3in1 Uplink port via BNC cabling.

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Contents AsantéBridge Users’ Guide Trademarks Tell Us What You Think Page Table of Contents Connecting a VT100 Terminal Default Settings Configuring a Redundant LinkSetting Up Out-of-Band Links AsantéBridge 1012 Local ManagementList of Figures Figure C-4 Crossover RJ-45 Cable page C-4 Introduction Introduction About ThisManual Intended Audience Conventions Used In This Manual Intended AudienceTell Us What You Think Technical SupportQuick Start Quick Start Before YouStart Introducing AsantéBridge Introducing the AsantéBridgeBridging Between Two Segments AsantéBridge Features SnmpFront Panel Quick ViewAsantéBridge Quick View Bridge Spanning Tree Status LEDs RJ45 Port ConnectorsBridge External Port Status LED Bridge Hub Port Status LEDs3in1 Port RJ21 Port ConnectorAsantéBridge 1012 Rear Panel Bridge External Port Link/Receive LED Through/End DIP SwitchBridge External Port AUI Bridge External Port Collision LEDOn/Off Switch PC/Terminal DIP SwitchAC Power Connector FanInterpreting LEDs FlashingInstalling the AsantéBridge Installing AsantéBridge 1012Preparing for the Installation Unpacking the AsantéBridge Basic Installation ProceduresTools Positioning the AsantéBridge Asante´HubRack-mounting the AsantéBridge Page Connecting Two Segments to the AsantéBridge Dividing the Network into SegmentsShown below About Spanning TreesWhat You Need Connecting Devices to the AsantéBridgeUsing the front panel RJ45 ports Using the rear panel RJ21 connector Conﬁguration OptionsQuick Start Connecting to the Network Connecting to the Network Before You StartAbout Bridging About BridgingSimple Transparent Bridge Bridging between segmentsAbout Bridging Spanning Tree Like thisRedundant bridging Using the 3in1 Port Connecting to the BNC PortUsing the 3in1 Port Interconnecting Hubs on Thin Ethernet BackboneConnecting to the AUI Port Interconnecting Using Foirl Fiber Optic Inter-Repeater LinkInterconnecting to Thick Ethernet Backbone Connecting to the RJ45 in and Out Ports Connecting an In-Band Daisychaining 10BaseT Conﬁguring a Redundant LinkChecking the Link Conﬁguring a Redundant Link An Example ConﬁgurationIf the Main Hub Goes Down If a Link Goes Down to the Main HubInterconnecting Hubs Setting Up Out-of-Band LinksSetting Up Out-of-Band Links 10 Connecting the Asanté Management Station for Out-of-Band Recommended Method Distance RestrictionsThrough/End Switch Conﬁguring Hub DIP SwitchesPC/Terminal Switch Connecting a VT100 Terminal Connecting a VT100 TerminalDefault Settings Lists the factory default settingsAsantéBridge 1012 Local Management These functions, use the following ﬂow chart AsantéBridge 1012 Local ManagementBridge Diagnostics Bridge DiagnosticsLocal Management Local Management Main MenuLocal Management Menu System General Help Menu Local Management Help WindowConﬁguration Menu System Accessing the Conﬁguration Menu systemConﬁguration Menu System Reset System item is a command. Selecting this item System Information MenuPassword Menu Password MenuBridge Snmp agent menu has the following four submenus Snmp AgentParameters Menu System TCP/IP Parameters Menu TCP/IP Parameters MenuSoftware Update Menu Software Update MenuAbout the Software Update function Conﬁguration Menu System 10 System Update Status Window Menu without taking any actionConﬁguration Menu System Snmp Trap Receiver Table 11 Snmp Trap Receiver TableSnmp Community Name Table 12 Snmp Community Name TableThis table allows you to control access to Snmp MIB objects Out-of-Band Parameters Menu 13 Out-of-Band Parameters MenuEnter control-z to return to the Conﬁguration Menu Bridge Parameters Menu System 14 Bridge Parameters MenuSpanning Tree Bridge Parameters Menu 15 Spanning Tree Bridge Parameters MenuActivity.To update the window, enter control-r Spanning Tree Port Setting Menu 16 Spanning Tree Port Setting MenuBridge Forwarding Table About ForwardingExit returns you to the Bridge Parameters Menu Alphabetic portion of the ﬁeld deﬁnes the type of entry About dynamic and static table entriesAsantéBridge 1012 Local Management Using the Edit Function 18 Editing the Forwarding TableUsing the Search Function 19 Searching for an AddressBridge Filtering Table About the Filtering Table20 Bridge Filtering Table Conﬁguration Menu System Resetting the Bridge 21 Resetting the BridgeMenu Statistics Menu System 22 Bridge StatisticsSupport for Pre 10BaseT Devices Appendix a Support for Pre 10BaseT Devices Technical Speciﬁcations Appendix B Technical Speciﬁcations B-3 B-4 Pinouts and Cable Speciﬁcations Appendix C Pinouts and Cable Speciﬁcations RJ-45 to RJ-21 Pinouts Amphenol to Modular JackC-3 RJ-45 Modular Jack to Wall Jack Pinouts RJ-45 to RJ-45 Crossover CableAUI DB-15 Pinouts Table C-1 AUI PinoutsC-6 AsantéBridge 1012 Index LED Numerics Manual P/N