Cabletron Systems 100 manual Congestion, Data link layer, Datagram, Data rate or speed, Downstream

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Glossary

congestion

A condition where a portion of the network is overloaded with more data than can be transmitted in the desired time period.

CSMA/CD (carrier-sense multiple access with collision detection)

A channel access (contention) method that requires each station to wait for an idle channel before transmitting. In addition, stations are able to detect overlapping transmissions (collisions) and retransmit in the event of a data collision.

data link layer

Layer 2 in the OSI model. Deﬁnes frame construction, addressing, error detection, and other services to higher layers.

datagram

Abbreviated and connectionless single-packet message sent from one station to another.

data rate (or speed)

The maximum number of bits of information that can be transmitted per second.

downstream

Refers to the relative position of a station in a network to another station in the same network. A station is downstream from another station if it receives data after the other station receives data.

dynamic address

An address “learned” by the ELS100-16TX, as opposed to addresses that are manually entered into the Bridge Address Table. The ELS100-16TX “learns” addresses by reading them from the data packets it processes.

EIA (Electronic Industries Association)

Organization that sets standards for electrical interfaces (connectors).

B-3

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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 Physical Connector PortsElectrical EnvironmentalStandard Support Diagnostic LEDsManagement Support Address Table SizeRegulatory Compliance Serial Cable PIN Assignments100BASE-T PIN Assignments ConnectorsCrossover Wiring STRAIGHT-THROUGH Wiring5 4 3 Rule EPIM-100FX SpecificationsCable Type Worst Case Budget Typical Budget Technical Speciﬁcations Address AlarmAddress table AgentBandwidth BackboneBpdu bridge protocol data unit Bps bits per secondData link layer CongestionDatagram Data rate or speedEncapsulation Full wire speedEncode EntityIcmp Internet control message protocol Intelligent bridge/switchIeee InitializationInteroperability InternetworkingIP Internet protocol ISO International Standards OrganizationMask MAC media access controlMbps megabits per second MIB management information basePropagation delay Power budgetOSI Open Systems Interconnection PacketService Rarp reverse address resolution protocolProtocol Protocol suiteSymbol SwitchSynchronous transmission Translating bridgeWAN wide area network UpstreamGlossary