Cabletron Systems 100 Backbone, Bandwidth, Bpdu bridge protocol data unit, Bps bits per second

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Glossary

backbone

The major, central transmission path for a network. A backbone usually handles high-volume, high-density trafﬁc. Typically a backbone connects various LANs into an integrated network.

bandwidth

A measure of the amount of trafﬁc a given medium can handle at one time: The communications capacity (measured in bits per second), of a transmission line or of a speciﬁc path through a network. Greater bandwidth generally means more information can be sent through a circuit during any given period of time.

BPDU (bridge protocol data unit)

A data unit transmitted as part of the IEEE 802.1d Spanning Tree Protocol. The exchange of BPDUs allows bridges within a network to logically conﬁgure the network as a single spanning tree.

bps (bits per second)

The basic unit of data communications rate measurement.

bridge

An intelligent, protocol independent device used to connect similar or dissimilar LANs.

bursty

Adjective used to describe sporadic heavy volumes of network trafﬁc (e.g., bursty trafﬁc).

bypass

Optical or electronic isolation of a station from the network. A bypass situation typically occurs as a result of a station failure or shutdown; the bypass allows the network to function normally, except for the absence of the missing station.

concentrator

A device that provides attachment points for stations that are not connected to the ELS100-16TX. The concentrator is connected directly to the network; the stations connect to the concentrator.

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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 Exit or Logout EraseTraplog 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 Deleting an IP Address Displaying IP AddressesChanging 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 Location System NameCommunity Names Set Community Name Aging ParameterELS100-16TX Management Tools Chapter Monitoring and Managing Your ELS100-16TXELS100-16TX 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 POWER-UP Diagnostics Chapter ELS100-16TX Diagnostics and TroubleshootingPower-up LED Sequence Speciﬁc Power-up Tests Software Checksum ComparisonResponses to Failures AT POWER-UP Power-up Diagnostics ResultsStatus and Activity Indicators ELS100-16TX Front Panel LEDs ACT ELS100-16TX does not Power UP 2 ELS100-16TX Has Rebooted Connectivity Problems3 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