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Cabletron Systems 100 Encapsulation, Encode, Entity, Extended LAN, ﬁltering rate, Forwarding rate

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Glossary

encapsulation

A method for moving messages across networks that use different types of protocols. The message is encapsulated (rather than translated), so it can move across a network that otherwise could not understand its protocol. Encapsulating bridges and switches generally use proprietary encapsulation schemes.

encode

To translate data into a series of electrical or optical pulses that can travel efﬁciently over a cable or other medium.

entity

An active element within an Open Systems Interconnection (OSI) network layer or sublayer.

extended LAN

A collection of LANs interconnected by protocol-independent bridges or switches.

ﬁltering rate

A measure (in packets per second) of the ELS100-16TX’s efﬁciency in examining each frame, comparing it with an address table, and then deciding whether to discard the frame or forward it.

forwarding rate

The rate (in packets per second) at which the ELS100-16TX can receive a stream of packets from one network segment, complete all processing, and transmit the packets to another network segment.

frame

A data message that includes a source address, destination address, data, frame check sequence (FCS), and control information.

full wire speed

Refers to packet forwarding at the maximum rate at which data can be transmitted on a given LAN.

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Cabletron Systems 100 Encapsulation, Encode, Entity, Extended LAN, ﬁltering rate, Forwarding rate, Frame, Full wire speed

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 Subnet MaskChanging 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 Troubleshooting ELS100-16TX does not Power UPConnectivity Problems 2 ELS100-16TX Has Rebooted3 ELS100-16TX Does Not Respond to NMS ELS100-16TX Diagnostics and Troubleshooting Electrical Connector PortsPhysical EnvironmentalDiagnostic LEDs Standard SupportRegulatory Compliance Address Table SizeManagement Support 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 Address table AlarmAddress AgentBpdu bridge protocol data unit BackboneBandwidth Bps bits per secondDatagram CongestionData link layer Data rate or speedEncode Full wire speedEncapsulation EntityIeee Intelligent bridge/switchIcmp Internet control message protocol InitializationIP Internet protocol InternetworkingInteroperability ISO International Standards OrganizationMbps megabits per second MAC media access controlMask MIB management information baseOSI Open Systems Interconnection Power budgetPropagation delay PacketProtocol Rarp reverse address resolution protocolService Protocol suiteSynchronous transmission SwitchSymbol Translating bridgeUpstream WAN wide area networkGlossary