1 10BASE-T Twisted Pair Network | Cabletron Systems EMM-E6 Ethernet

CHAPTER 2: REQUIREMENTS / CONFIGURATIONS

2.1.110BASE-T Twisted Pair Network

When connecting a 10BASE-T segment at any of the 10BASE-T hub ports or a 10BASE-T Ethernet Port Interface Module (EPIM-T), ensure that the network meets the following requirements:

•Length - The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices transmit over a 100 meter (328 foot) link using 22-24 AWG unshielded twisted pair wire. However, cable quality largely determines maximum link length. If you use high quality, low attenuation cable, it may be possible achieve link lengths of up to 200 meters. Cable delay limits maximum link length to 200 meters, regardless of the cable type.

NOTE

Losses introduced by connections at punch-down blocks and other equipment reduce total segment length. For each connector or patch panel in the link, subtract 12 meters from the total length of your cable.

•Insertion Loss - Between frequencies of 5.0 and 10.0 MHz, the maximum insertion loss must not exceed 11.5 dB. This includes the attenuation of the cables, connectors, patch panels, and reﬂection losses due to impedance mismatches in the link segment.

•Impedance - Cabletron Systems 10BASE-T Twisted Pair products work on twisted pair cable with 75Ω to 165Ω impedance.

Unshielded twisted pair cables typically have an impedance of between 85Ω and 110Ω. You can also use shielded twisted pair

cables, such as IBM Type 1 cable, but keep in mind that this cable has an impedance of 150Ω.

The high impedance of the IBM Type 1 cable increases signal reflection. However, due to cable shielding, and its subsequent lack of crosstalk between shielded pairs, this signal reflection has little effect on the quality of the received signal.

2-2	EMM-E6 User’s Guide

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Cabletron Systems EMM-E6 Ethernet manual 1 10BASE-T Twisted Pair Network

Contents

EMM-E6 EMM-E6 USER’S Guide Windows is a registered trademark of Microsoft Corp DOC Notice FCC Notice Cabletron SYSTEMS, INC Program License Agreement Vcci Notice Cabletron Software Program License Bellcore Testing Information Exclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Table of Contents Table of Contents Configuration Screen Accessing Local Management Community NamesAttaching a Console Trap Table Screen Command Line Interface Screen MIB Navigator Router Setup Screen Device Statistics ScreenTroubleshooting Image File Download Appendix B EMM-E6 OIDs Appendix a EMM-E6 Specifications Chapter Introduction Using this Manual Introduction Using this Manual Lanviewsecure Support EMM-E6 Features I960 Processor Design Available Routing ServicesIeee 802.1d Compliant Special Filtering Database EMM-E6 User’s Guide Expandable Flash Eeprom Memory User Configurable EPIMs Expandable Ldram Lanview Diagnostic LEDsExpandable Sdram Snmp and Rmon support Local Communication Ports DLM SupportIn-Band Telnet with MIB Navigator Port Locking and Lanviewsecure Support Mmac with Flexible Network BUS Mmac Chassis Ethernet Channel a Ethernet Channels A, B, C, D, E, and F Ethernet Channels B and C Other FNB Modules Snacmim TRMIM-32A TRMIM-34A TRRMIM-F2T TRRMIM-F3T Ethernet Channel D Channels E and F OSI Model Bridges Filtering and Forwarding Spanning Tree Algorithm Local Management Features Snmp Community Names Review of Addressing MIBsMAC Addresses 00-00-1D-00-26-FB IP Addresses Class a Subnet Addresses Identifying IP Address Classes Subnet Masks S H Examples of Class C Subnet Masks Examples of Class B Subnet Masks Operation of the Subnet Mask Default Gateway Addressing Example EMM-E6 User’s Guide Lanviewsecure Lanview LEDs and Reset Switch EMM-E6 User’s Guide Related Manuals Getting Help Network Requirements Chapter Requirements / Configurations 1 10BASE-T Twisted Pair Network Network Requirements Multimode Fiber Optic Network Single Mode Fiber Optic Network Transceiver Requirements Thin-net Network Repeater Media Interface Modules Sample Repeater MIMs Port Assignment Modules Sample Network Configurations EMM-E6 as a Multiport Router Three Networks With a Single MMAC-FNB Ing le Channe l Adding Users to a Separate Segment Fault Tolerant Wiring Hierarchy Sample Network Configurations EMM-E6 and BRIMs Chapter Installation Quantity Unpacking the EMM-E6 EMM-E6 Mode Switches Setting Mode Switches Do not change the state of Switch 6 unless you Setting Mode Switches Locating SIMMs Simm Upgrades Simm Slot Locations Installing a Simm To install a Simm Installing SIMMs ADDING/REPLACING EPIMs To install an Epim Locating BRIMs Brim Connector Locations PRE-INSTALLATION Test Pre-Installation Test Installing the EMM-E6 Mmac M8FNB EMM-E6 EMM-E6 Installation CHECK-OUT Installation Checkout Connecting to the Network Connecting a Twisted Pair Segment to an EPIM-T EPIM-T 12. The EPIM-X Connecting an AUI Cable to an EPIM-X Connecting to an EPIM-F1/F2, or EPIM-F3 Connecting to the Network EMM-E6 User’s Guide Connecting a Thin-Net Segment to an EPIM-C 14. The EPIM-C 15. The EPIM-A Connecting an AUI Cable to an EPIM-A EMM-E6 User’s Guide Chapter Attaching a Console Configuring Your Terminal Communications Setup Menu Display Setup MenuKeyboard Set-up Menu Configuring a Console Cable VT S i T i l Connecting to a VT Series Terminal Connecting to an IBM PC or Compatible Pinout Descriptions Configuring a UPS CableRJ45 DB9 EMM-E6-960 Local Management Chapter Accessing Local Management Feature Selection Screen EMM-E6 User’s Guide Chapter Community Names Accessing the Community Name Table Community Name Table Screen Fields AccessCommunity Name Establishing Community Names Accessing the Configuration Screen Chapter Configuration Screen Channel Configuration Screen FieldsIP Address Default Gateway Default InterfacePort Enable Override SubNET Mask Host IP applies to each interface Setting the Host IP Address Modifying a Subnet Mask Setting Default Gateway and Interface Setting Default Gateway and Interface CONNECTING/DISCONNECTING a UPS Enabling Ports Unlocking Ports Chapter Trap Table Screen Accessing the Trap Table Screen Trap Table Screen Fields Configuring the Trap TableSnmp Community Name Traps If you exit without saving, you lose all edits Chapter Snmp Tools Screen Accessing the Snmp Tools Screen Snmp Tools Screen Fields Cycles Security Access LevelRepeat Community Name Getting and Setting Oids Getting and Setting Oids Scrolling Through MIB Oids Scrolling Through MIB Oids EMM-E6 User’s Guide Router Setup Screen Chapter Router Setup Screen Device Statistics Screen Chapter Device Statistics Screen Device Statistics Device Statistics Screen Commands Network Selecting an Update FrequencySlot Port Enabling Ports Selecting a Network/Slot/Port Exiting the Device Statistics Screen Disabling Ports EMM-E6 CLI Information Screen Chapter Command Line Interface Screen Managing Device MIBs Chapter MIB Navigator Accessing the MIB Navigator Conventions For MIB Navigator Commands MIB Navigator Command SET Overview Branch Navigation Commands Format cd Path Example MIBNav cd iso/org/dod/internet/mgmt Navigation Commands cont’d 13-6 EMM-E6 User’s Guide EMM-E6 User’s Guide 13-7 13-8 EMM-E6 User’s Guide EMM-E6 User’s Guide 13-9 13-10 EMM-E6 User’s Guide Example MIBNav arp -a Built-In Commands Netstat Built-In Commands cont’d EMM-E6 User’s Guide 13-13 Example EMM-E6 User’s Guide 13-15 Format Done Special Commands Using Lanview Chapter Troubleshooting LED Color Description Error Condition Recommended Action EMM-E6 User’s Guide 14-3 Troubleshooting Checklist Problem Possible Causes Recommended Action Troubleshooting Checklist 14-6 EMM-E6 User’s Guide Using the Reset Switch Chapter Image File Download Decompress the image ﬁle Getting Started Forced Download with Unix 15-4 EMM-E6 Users Guide EMM-E6 Users Guide 15-5 15-6 EMM-E6 Users Guide Standard Local Download Standard Download Procedure Remote Runtime Download Runtime Download Procedure 15-10 EMM-E6 Users Guide Bridging Functionality Appendix a EMM-E6 Specifications Repeater Functionality COM 2 Port COM 1 PortEnvironmental Requirements Physical Properties Safety 10BASE-T EPIM-T 10BASE-T Twisted Pair Port EPIM-F2 EPIM-F1/F2 Multimode Fiber Optic Port Figure A-4. EPIM-F3 EPIM-F3 Single Mode Fiber Optic Port Parameter Typical Minimum Thin-net cable Figure A-5 EPIM-C BNC Port Type Position D type receptacle EPIM-A and EPIM-X AUI Port Appendix B CtBridgeStpProtocolSpecificationSpanning Tree Protocol RptrScrAddrMgmtHashType Configuring ARP Request Packets RptrSrcAddrMgmtPortLock Port Group SecurityRptrPortGrpSrcAddrLock RptrPortSecurityLockAddAddress RptrPortSecurityLockStatusRptrPortSecurityLockDelAddress Object Identiﬁer RptrPortSecurityFullSecEnabled RptrPortSecurityDisableOnViolation Enabling Network Level Snmp Traps Enabling & Disabling Snmp TrapsRptrHwTrapsSetLink RptrHwTrapsSetSeg RptrSaTrapSetScraddr Enabling Module Level Snmp TrapsRptrPortGrpHwTrapSetLink RptrPortGrpHwTrapSetSeg Enabling Port Level Snmp TrapsRptrPortGrpSaTrapSetSrcaddr RptrPortHwTrapSetSeg RptrPortHwTrapSetLink Activating Rmon Groups ChCompAdminStatusChCompName Bridging Dot1dstpPortEnableTrunk Port Security RptrPortSrcAddrForceTrunk Fnbconnect Channel SelectionFnbPortConnectPortAssignment Remote Downloading OID Hashing on Source AddresesRptrSrcAddrMgmtHashType 10BASE-FL Glossary10BASE-T ATM AUI BootpBrim Buses BroadcastCard Chassis CSMA/CD DNI DLMEeprom Epim FNB Fddi Ieee IanaIetf LAN ISOLanview Ldram MIM MIB OID Nvram Rmim PVCRmon Sdram SMA SimmSnmp SQE TCP STP UTP Numerics Index Lanview Eeprom Tprmim LED Description EMM-E6 Installation