OSI Open Systems Interconnection, Packet | Cabletron Systems 100

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.

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Cabletron Systems 100 manual OSI Open Systems Interconnection, Packet, PDU protocol data unit, Peer-to-peer, Physical layer

Contents

User Guide Page FCC Notice DOC Notice Cabletron Software Program License Declaration of Conformity Contents ELS100-16TX Diagnostics Troubleshooting Monitoring and Managing Your ELS100-16TX Appendix a Technical Specifications Appendix B Glossary Contents Viii Chapter Introduction About this Manual Getting Help Your email address Document Conventions Related Documentation Overview ELS100-16TX Front Panel SmartSTACK 100 ELS100-16TX Architecture Introduction Port Trunking Autonegotiation Store and Forward Switching Discarding Local Trafﬁc Typical Switching Application Spanning Tree Algorithm SmartSTACK 100 ELS100-16TX Bridge Address Table SmartSTACK 100 ELS100-16TX Port Mirroring SmartSTACK 100 ELS100-16TX Sample Applications SmartSTACK 100 ELS100-16TX Trunking Virtual Workgroups SmartSTACK 100 ELS100-16TX Trunking with 100 Mbps Ports Repeater Traffic Workgroup a Workgroup B Local Console Manager Command Syntax Conventions Basic LCM Commands Help ELS100-16TX Local Console Manager Exit or Logout EraseTraplog Introduction Chapter Unpacking and Installing Your ELS100-16TX ELS100-16TX Front Panel Port LEDs 100BASE-T Epim Ports Reset Switch Status LEDs ACT Installing AN Epim Describes the ELS100-16TX buttons Installing an Epim Installing the ELS100-16TX Rack-Mounting an ELS100-16TX Attaching Rackmount Brackets Checking the POWER-UP Diagnostics Sequence Connecting the Local Console Manager Connecting to the Network Connecting UTP Cables ELS100-16TX Twisted Pair Connection Connecting a Segment to the EPIM-100FX Cable Pinouts RJ45 Crossover Cable Fiber Optic Network Connection EPIM-100FX Port Unpacking and Installing Your ELS100-16TX Chapter Configuring Your ELS100-16TX Spectrum Spel Spma Assigning 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 prompt Disabling Bridging Displaying Bridging Functions Enabling Trunking Trunk Groups 100BASE-T Crossover Cables Trunk Groups Disabling Trunking Displaying Trunking Status Display could look like the following Enabled, Rip listening Enabling Port Mirroring Disabling Mirroring Displaying Mirroring Status To check the status for ports conﬁgured for mirroring Defining and Deleting Workgroups Deﬁning Virtual Workgroups LCM responds with the following display Assigning a Community Name Configuring BROADCAST/MULTICAST Storm Protection Modifying MIB Variables System Contact System Location System NameCommunity Names Set Community Name Aging Parameter ELS100-16TX Management Tools Chapter Monitoring and Managing Your ELS100-16TXELS100-16TX Statistics Gathering Statistics System Statistics Ethernet Port Statistics Using LCM to Check ELS100-16TX Status Displaying Status Enabled, Rip listening Displaying MAC Addresses To display all MAC addresses, at the LCM prompt Displaying Manufacturing Information LCM would display Using LCM to Manage the ELS100-16TX Managing the ELS100-16TX Disabling a Port Enabling a Port NoRIP 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 Comparison Responses 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 Environmental Diagnostic LEDs Standard Support Regulatory Compliance Address Table SizeManagement Support Serial Cable PIN Assignments Connectors 100BASE-T PIN Assignments STRAIGHT-THROUGH Wiring Crossover Wiring EPIM-100FX Specifications 5 4 3 Rule Cable Type Worst Case Budget Typical Budget Technical Speciﬁcations Address table AlarmAddress Agent Bpdu bridge protocol data unit BackboneBandwidth Bps bits per second Datagram CongestionData link layer Data rate or speed Encode Full wire speedEncapsulation Entity Ieee Intelligent bridge/switchIcmp Internet control message protocol Initialization IP Internet protocol InternetworkingInteroperability ISO International Standards Organization Mbps megabits per second MAC media access controlMask MIB management information base OSI Open Systems Interconnection Power budgetPropagation delay Packet Protocol Rarp reverse address resolution protocolService Protocol suite Synchronous transmission SwitchSymbol Translating bridge Upstream WAN wide area network Glossary