Cabletron Systems manual 5 4 3 Rule, EPIM-100FX Specifications

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Technical Speciﬁcations

Table A-5. Crossover RJ45 Pin Assignments

	ELS100-16TX		ELS100-16TX

1	(Rx+)	3	(Tx+)

2	(Rx-)	6	(Tx-)

3	(Tx+)	1	(Rx+)

6	(Tx-)	2	(Rx-)

A.6 THE 5 - 4 - 3 RULE

Between any two nodes (i.e., PCs or other stations) on the network, there can be:

•Up to ﬁve segments in series

•Up to four repeaters or multi-port hubs

•Up to three populated segments (that is, segments attached to two or more PCs). The remaining two segments are unpopulated; these are known as inter-repeater links or IRLs. This distinction between populated and unpopulated segments is signiﬁcant for coax networks only.

Note: This rule is completely consistent with the IEEE 802.3 specification, and is meant only to summarize the configuration specification.

A.7 EPIM-100FX SPECIFICATIONS

The ELS100-16TX uses a Ethernet Port Interface Module (EPIM) to provide front panel cable connections. FEPIMs are user-installable. See Section 2.2, Installing an EPIM.

The EPIM-100FX shown in Figure A-2 supports Multimode Fiber Optic cabling. The EPIM-100FX is equipped with an SC style connector.

A-6

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Contents User Guide Page FCC Notice DOC Notice Cabletron Software Program License Declaration of Conformity Contents ELS100-16TX Diagnostics Troubleshooting Monitoring and Managing Your ELS100-16TXAppendix a Technical Specifications Appendix B GlossaryContents Viii Chapter Introduction About this Manual Getting Help Your email addressDocument Conventions Related Documentation Overview ELS100-16TX Front PanelSmartSTACK 100 ELS100-16TX Architecture Introduction Port Trunking AutonegotiationStore and Forward Switching Discarding Local TrafﬁcTypical Switching Application Spanning Tree AlgorithmSmartSTACK 100 ELS100-16TX Bridge Address Table SmartSTACK 100 ELS100-16TX Port Mirroring SmartSTACK 100 ELS100-16TX Sample ApplicationsSmartSTACK 100 ELS100-16TX Trunking Virtual Workgroups SmartSTACK 100 ELS100-16TX Trunking with 100 Mbps PortsRepeater Traffic Workgroup a Workgroup B Local Console Manager Command Syntax Conventions Basic LCM Commands HelpELS100-16TX Local Console Manager Erase Exit or LogoutTraplog Introduction Chapter Unpacking and Installing Your ELS100-16TX ELS100-16TX Front PanelPort LEDs 100BASE-T Epim Ports Reset Switch Status LEDs ACT Installing AN Epim Describes the ELS100-16TX buttonsInstalling an Epim Installing the ELS100-16TX Rack-Mounting an ELS100-16TXAttaching Rackmount Brackets Checking the POWER-UP Diagnostics Sequence Connecting the Local Console ManagerConnecting to the Network Connecting UTP Cables ELS100-16TX Twisted Pair ConnectionConnecting a Segment to the EPIM-100FX Cable Pinouts RJ45 Crossover CableFiber Optic Network Connection EPIM-100FX Port Unpacking and Installing Your ELS100-16TX Chapter Configuring Your ELS100-16TX Spectrum Spel SpmaAssigning IP Addresses Type ipaddr PORT-NUMBER IP Address Displaying IP Addresses Deleting an IP AddressChanging a Subnet Mask Enabling Bridging To change the subnet mask, at the LCM promptDisabling Bridging Displaying Bridging FunctionsEnabling Trunking Trunk Groups 100BASE-T Crossover CablesTrunk Groups Disabling Trunking Displaying Trunking Status Display could look like the followingEnabled, Rip listening Enabling Port Mirroring Disabling MirroringDisplaying Mirroring Status To check the status for ports conﬁgured for mirroring Defining and Deleting Workgroups Deﬁning Virtual WorkgroupsLCM responds with the following display Assigning a Community Name Configuring BROADCAST/MULTICAST Storm Protection Modifying MIB Variables System ContactSystem Name System LocationCommunity Names Set Community Name Aging ParameterChapter Monitoring and Managing Your ELS100-16TX ELS100-16TX Management ToolsELS100-16TX Statistics Gathering Statistics System StatisticsEthernet Port Statistics Using LCM to Check ELS100-16TX Status Displaying StatusEnabled, Rip listening Displaying MAC Addresses To display all MAC addresses, at the LCM prompt Displaying Manufacturing Information LCM would displayUsing LCM to Manage the ELS100-16TX Managing the ELS100-16TXDisabling a Port Enabling a PortNoRIP Option Changing a Community Name Setting the Baud Rate Setting a Reboot Time Chapter ELS100-16TX Diagnostics and Troubleshooting POWER-UP DiagnosticsPower-up LED Sequence Speciﬁc Power-up Tests Software Checksum ComparisonPower-up Diagnostics Results Responses to Failures AT POWER-UPStatus and Activity Indicators ELS100-16TX Front Panel LEDs ACT ELS100-16TX does not Power UP Connectivity Problems 2 ELS100-16TX Has Rebooted3 ELS100-16TX Does Not Respond to NMS ELS100-16TX Diagnostics and Troubleshooting Connector Ports PhysicalElectrical EnvironmentalDiagnostic LEDs Standard SupportAddress Table Size Management SupportRegulatory Compliance Serial Cable PIN AssignmentsConnectors 100BASE-T PIN AssignmentsSTRAIGHT-THROUGH Wiring Crossover WiringEPIM-100FX Specifications 5 4 3 RuleCable Type Worst Case Budget Typical Budget Technical Speciﬁcations Alarm AddressAddress table AgentBackbone BandwidthBpdu bridge protocol data unit Bps bits per secondCongestion Data link layerDatagram Data rate or speedFull wire speed EncapsulationEncode EntityIntelligent bridge/switch Icmp Internet control message protocolIeee InitializationInternetworking InteroperabilityIP Internet protocol ISO International Standards OrganizationMAC media access control MaskMbps megabits per second MIB management information basePower budget Propagation delayOSI Open Systems Interconnection PacketRarp reverse address resolution protocol ServiceProtocol Protocol suiteSwitch SymbolSynchronous transmission Translating bridgeUpstream WAN wide area networkGlossary