Cabletron Systems 100 manual OSI Open Systems Interconnection, Packet, PDU protocol data unit

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Glossary

OSI (Open Systems Interconnection)

Refers to the OSI reference model, a logical structure for network operations. OSI is the internationally accepted framework of standards for internetwork communication.

packet

A group of bits including data and control elements arranged in a speciﬁc format that are transmitted and switched as a composite whole. Control elements include a source address, destination address, frame control and status indicators, and a Frame Check Sequence (FCS).

PDU (protocol data unit)

The portion of a datagram that contains the data associated with a particular protocol.

peer-to-peer

Term used to describe data transmission between entities in the same sublayer of the OSI model.

physical layer

Layer 1 of the OSI model. Deﬁnes and handles the electrical and physical connections between systems.

power budget

The difference between transmit power and receiver sensitivity, including any safety margins.

PPP (point-to-point protocol)

A protocol for transmitting datagrams (IP or MAC packets) over a serial point-to-point link (e.g., the out-of-band management port).

pps (packets per second)

Unit of measure used to express packet data throughput. 18 pps is approximately equal to 9600 bps.

propagation delay

The time it takes for a signal to travel across a network.

B-8

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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 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 speed Encode Full wire speed Encapsulation 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