Vci, Virtual Channel | IBM ATM OC-3c guide

6GLOSSARY

VCI

Virtual Channel Identifier — A 16-bit value in the ATM cell header that provides a unique identifier for the virtual channel (VC) that carries that particular cell.

Virtual Channel

See VC.

VLAN

Virtual Local Area Network — A group of location and topology independent devices that communicate as if they are on the same physical LAN.

VLT

Virtual LAN Trunk — A connection which carries traffic for more than one VLAN. A port which is part of a VLT connection may be a member of all VLANs.

VP

Virtual Path — Describes a set of virtual channels (VCs) between switches, grouped together.

VPC

Virtual Path Connection — A concatenation of VP links.

VPCI/VCI

Virtual Path Connection Identifier/Virtual Channel Identifier — A combination of two numbers, one for identifying the VP and one for the VCI.

VPI

Virtual Path Identifier — An 8-bit value in the cell header that identifies the connection to which the cell belongs.

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IBM ATM OC-3c manual Vci, Virtual Channel

Contents

User’s Guide First Edition October Research Triangle Park NC Contents Accessing Management Features Screen Map Glossary Bibliography Page Terminology About this GuideIntroduction ATM Terminology Task Location Finding Information in This GuideConventions Icon Alerts you to Related Documentation Bold About this Guide Features and Benefits ATM Benefits ATM Module Features Wire Rate Transmission on ATM port Network Layer Concepts Layered Network Architecture What is LAN Emulation LANE? Upper Layer Protocols LAN Emulation Client LEC LAN Emulation Configuration Server LecsLAN Emulation Components LAN Emulation Server LES LAN Emulation Components in Your Network LAN Emulation and IBM Devices Locating the Lecs Joining the ElanLEC must know the name of the Elan it is to join If the destination MAC address is listed in the ARP Table Address ResolutionMapping Ethernet and ATM Addresses What Happens to Broadcast and Multicast Frames? LAN Emulation Address Resolution Protocol LearpWhat Happens to Unicast Frames? ATM is Cell-based Asynchronous Transfer Mode ATM LayerATM Adaptation Layer AAL ATM is Service Transparent ATM is Connection-oriented Virtual Path Identifier VPI Virtual Channel Identifier VCI 7Switching Cells using VPI and VCI values Permanent Virtual Circuits PVCs Switched Virtual Circuits SVCsATM Interfaces Networkhostidentifier Interim Local Management Interface IlmiATM Address Registration ATM Layer and Cell Structure 10ATM Cell Structure Physical Layer Sonet STS-3c 16CHAPTER 2 Network Layer Concepts Virtual LAN Concepts What is a Virtual LAN VLAN?Creating Inter-switch VLANs Extending VLANs into the ATM Network 2VLAN to Elan Mapping Extending VLANs into the ATM Network 4CHAPTER 3 Virtual LAN Concepts Does your existing ATM network have sufficient resources? Putting Your ATM Network TogetherPlanning Your Network Can your ATM devices communicate with each other? ATM Configuration Rules Extending VLANs Through the ATM Network Are the LAN Emulation services configured correctly? ATM Connections Within Your Network 1SVC Signalling Not Supported in Remote Edge-device Network Configuration Examples ATM Backbone in the Building Campus Configuration Campus Configuration 3Resilient Link Configuration Making a Building Resilient to Network Failure Installing and Setting UP the Module Following Safety Information Îïàñíî Ebezpečí Device Support Pre-installation ProcedureCheck the Power Supply Installation 1Fitting the ATM Module Powering Up the Switch Post-Installation ChecksConnecting a cable to the ATM Port Power On Self Test Post LED Summary Checking the Physical Connections Checking the Power SupplyChecking that the ATM Module is Installed Correctly 8CHAPTER 6 Installing and Setting UP the Module Keyboard Shortcuts Accessing Management FeaturesScreen Map Correcting Text Entry Screen Map Logging On Main Banner Automatic Logout User Name Default Access Level PasswordLogging Off Managing the ATM Module 1Management Screen Map Configuring an ATM Port 2ATM Module Configuration Screen Configuring an ATM Port Desired Value of VPI Number of bits Required 3ATM LEC Setup Screen 4Switch Management Screen Displaying all VLANs ATM Port Setup 5VLAN Selected Screen 7ATM Port Setup Screen Problem Solution Mapping Far End MAC Addresses 8ATM ARP Table Screen Creating a MAC Address to ATM Entry Mapping Far End MAC Addresses Updating Address Entries Displaying an ATM ConnectionFinding an Address Entry Deleting an Address Entry Setting Up Resilient Links Finding an ATM Connection 10Software Upgrade Screen Upgrading Software Error Messages Download successful Status MessagesActive Load Paused Monitoring the ATM Module 1Status Monitoring Screen Map Physical Connection Statistics OverviewMonitoringUse ATM Physical Layer Statistics screen 2Switch Management Screen ATM Port Statistics 4CHAPTER 9 Monitoring the ATM Module ATM Vlan LEC Status 4ATM Vlan LEC Status Screen Undefined Error State Possible Causes Possible Solutions NoneTimeout LEC State Description Parameters State Possible Causes Possible Solutions Invalid RequestState Possible Causes Possible Solutions Duplicated ATM Duplicate LAN Access Denied State Possible Causes Possible Solutions InsufficientState Possible Causes Possible Solutions Invalid No Configuration Configuration State Possible Causes Possible SolutionsError Connecting to BUS ATM Physical Layer Statistics Following button is available on this screen ATM Physical Layer Statistics Using Physical Layer Statistics to Troubleshoot ATM Physical Layer Statistics 14CHAPTER 9 Monitoring the ATM Module World Trade Safety Information Safety InformationSafety Notices 2APPENDIX a Safety Information Safety Notices Neodstraňujte desky modulů, pokud je připojeno napájení Safety Notices 6APPENDIX a Safety Information Safety Notices 8APPENDIX a Safety Information Screen Access Rights 2APPENDIX B Screen Access Rights ATM Cable Specification ATM Module Technical SpecificationsEnvironmental Specifications Numerical Aperture Specification DescriptionDoes the Cable Provide Sufficient Bandwidth? Example 4APPENDIX C ATM Module Technical Specifications Troubleshooting How to Use this Guide to Troubleshoot Using LEDs Identifying the Problem Figure D-1Troubleshooting Flow Diagram Access the Physical Layer Statistics Screen Are there Physical Layer Errors? Access the ATM Port Setup Screen Check the Physical Connections Access the ATM Port Statistics Screen Is the ATM Port Enabled?Enable the ATM Port Are Cells being transmitted and received? Is the ATM Switch Using AAL5? Access the ATM Vlan LEC Status ScreenIs the LEC ATM Address Valid for the Default VLAN? Make Signalling Compatible Access the ATM Module Configuration ScreenIs Signalling Compatible? Both Devices Must be AAL5 Compliant Are the MAX VPI and VCI Bits Compatible? Is the Ilmi Connection Set Up Correctly?Make Ilmi VPI/VCI Same at Both Ends of the Link Make the MAX VPI and VCI Bits Compatible Why has the LEC Operation Failed? Operational State Possible Causes LEC is trying to join Is the LEC Operational Now? Are the LECs on the Same Emulated LAN? Elan Configuration ProblemsHas the Problem been Solved? Re-map or Route the LEC Is There Still a Problem? Is the MAC Address in the Switch Database?Enter the MAC Address in the Switch Database Use routing Solving Known Problems Shuts itself down after a Power Supply ProblemsSwitch powers up but then Few minutes Self Test Post Power On Self Test Post FailureATM Module Fails Power on Cable Connection Problems Far End Status LED indicates Connections ATM ProblemsOnly showing reserved ATM Other Vlan or Elan ProblemsCommunicate with each Insufficient Resources Example To clean the cable connectors Cleaning Dirty Fiber Optic ConnectorsTo clean fiber optic connectors on the ATM Module Voice Support Technical Support and ServiceElectronic Support IBM Bulletin Board System 2APPENDIX E Technical Support and Service Trademarks Production Status Statement of Limited WarrantyIBM Warranty for Machines Warranty Service Extent of Warranty Limitation of Liability Electronic Emission Notices Federal Communications Commission FCC Statement European Union EU Statement Information To The User How to Identify and Resolve Radio-TV Interference Problems ATM Forum ATM SwitchGlossary Cell Header ByteCell Connectionless LAN Emulation Lane Link OC-n MultiplexOctet Payload Telnet UNI VCI Virtual Channel LAN Emulation Lane Asynchronous Transfer Mode ATMBibliography Books Bibliography Index ATM SDH STM-1 Sonet Index