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Cabletron Systems 100 manual STRAIGHT-THROUGH Wiring, Crossover Wiring

Models: 100

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Technical Speciﬁcations

Table A-3. 100BASE-T Pin Assignments

Pin	Assignmenta
1	Rx+

2	Rx-

3	Tx+

6	Tx-

a. The “+” and “-” signs are used to represent the polarity of the two wires that make up each wire pair.

A.4 STRAIGHT-THROUGH WIRING

If the twisted-pair link segment is to join two ports on a switch, and only one of the ports has an internal crossover, the two pairs of wires must be straight-through, as shown in Table A-4.

Table A-4. Straight-Through RJ45 Pin Assignments

	ELS100-16TX (Crossed)		Device (Not Crossed)

1	(Rx+)	1	(Tx+)

2	(Rx-)	2	(Tx-)

3	(Tx+)	3	(Rx+)

6	(Tx-)	6	(Rx-)

A.5 CROSSOVER WIRING

Two ELS100-16TXs can communicate only if the transmitter on one unit is connected to the receiver on the other unit. This reversal, or crossover function, can be implemented either in the wiring or in the device itself. When connecting ELS100-16TXs, a crossover must be implemented in the wiring. Refer to Table A-5 for crossover pin assignments.

A-5

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Cabletron Systems 100 manual STRAIGHT-THROUGH Wiring, Crossover Wiring

Contents

User Guide Page FCC Notice DOC Notice Cabletron Software Program License Declaration of Conformity Contents Monitoring and Managing Your ELS100-16TX ELS100-16TX Diagnostics TroubleshootingAppendix B Glossary Appendix a Technical SpecificationsContents Viii Chapter Introduction About this Manual Your email address Getting HelpDocument Conventions Related Documentation ELS100-16TX Front Panel OverviewSmartSTACK 100 ELS100-16TX Architecture Introduction Autonegotiation Port TrunkingDiscarding Local Trafﬁc Store and Forward SwitchingSpanning Tree Algorithm Typical Switching ApplicationSmartSTACK 100 ELS100-16TX Bridge Address Table SmartSTACK 100 ELS100-16TX Sample Applications SmartSTACK 100 ELS100-16TX Port MirroringSmartSTACK 100 ELS100-16TX Trunking SmartSTACK 100 ELS100-16TX Trunking with 100 Mbps Ports Virtual WorkgroupsRepeater Traffic Workgroup a Workgroup B Local Console Manager Command Syntax Conventions Help Basic LCM CommandsELS100-16TX Local Console Manager Traplog EraseExit or Logout Introduction ELS100-16TX Front Panel Chapter Unpacking and Installing Your ELS100-16TXPort LEDs 100BASE-T Epim Ports Reset Switch Status LEDs ACT Describes the ELS100-16TX buttons Installing AN EpimInstalling an Epim Rack-Mounting an ELS100-16TX Installing the ELS100-16TXAttaching Rackmount Brackets Connecting the Local Console Manager Checking the POWER-UP Diagnostics SequenceConnecting to the Network ELS100-16TX Twisted Pair Connection Connecting UTP CablesCable Pinouts RJ45 Crossover Cable Connecting a Segment to the EPIM-100FXFiber Optic Network Connection EPIM-100FX Port Unpacking and Installing Your ELS100-16TX Spectrum Spel Spma Chapter Configuring Your ELS100-16TXAssigning IP Addresses Type ipaddr PORT-NUMBER IP Address Changing a Subnet Mask Displaying IP AddressesDeleting an IP Address To change the subnet mask, at the LCM prompt Enabling BridgingDisplaying Bridging Functions Disabling BridgingEnabling Trunking 100BASE-T Crossover Cables Trunk GroupsTrunk Groups Disabling Trunking Display could look like the following Displaying Trunking StatusEnabled, Rip listening Disabling Mirroring Enabling Port MirroringDisplaying Mirroring Status To check the status for ports conﬁgured for mirroring Deﬁning Virtual Workgroups Defining and Deleting WorkgroupsLCM responds with the following display Assigning a Community Name Configuring BROADCAST/MULTICAST Storm Protection System Contact Modifying MIB VariablesCommunity Names System NameSystem Location Aging Parameter Set Community NameELS100-16TX Statistics Chapter Monitoring and Managing Your ELS100-16TXELS100-16TX Management Tools System Statistics Gathering StatisticsEthernet Port Statistics Displaying Status Using LCM to Check ELS100-16TX StatusEnabled, Rip listening Displaying MAC Addresses To display all MAC addresses, at the LCM prompt LCM would display Displaying Manufacturing InformationManaging the ELS100-16TX Using LCM to Manage the ELS100-16TXEnabling a Port Disabling a PortNoRIP Option Changing a Community Name Setting the Baud Rate Setting a Reboot Time Power-up LED Sequence Chapter ELS100-16TX Diagnostics and TroubleshootingPOWER-UP Diagnostics Software Checksum Comparison Speciﬁc Power-up TestsStatus and Activity Indicators Power-up Diagnostics ResultsResponses to Failures AT POWER-UP ELS100-16TX Front Panel LEDs ACT ELS100-16TX does not Power UP 3 ELS100-16TX Does Not Respond to NMS Connectivity Problems2 ELS100-16TX Has Rebooted ELS100-16TX Diagnostics and Troubleshooting Environmental Connector PortsPhysical ElectricalStandard Support Diagnostic LEDsSerial Cable PIN Assignments Address Table SizeManagement Support Regulatory Compliance100BASE-T PIN Assignments ConnectorsCrossover Wiring STRAIGHT-THROUGH Wiring5 4 3 Rule EPIM-100FX SpecificationsCable Type Worst Case Budget Typical Budget Technical Speciﬁcations Agent AlarmAddress Address tableBps bits per second BackboneBandwidth Bpdu bridge protocol data unitData rate or speed CongestionData link layer DatagramEntity Full wire speedEncapsulation EncodeInitialization Intelligent bridge/switchIcmp Internet control message protocol IeeeISO International Standards Organization InternetworkingInteroperability IP Internet protocolMIB management information base MAC media access controlMask Mbps megabits per secondPacket Power budgetPropagation delay OSI Open Systems InterconnectionProtocol suite Rarp reverse address resolution protocolService ProtocolTranslating bridge SwitchSymbol Synchronous transmissionWAN wide area network UpstreamGlossary