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详细说明： 相关的目录 Contents 1. Overview..................................................................................................................................................... 1 1.1 Introduction.................................................................... ......................................................... 1 1.2 Scope....................................................................................................................................... 1 2. References................................................................................................................................................... 3 3. Definitions................................................................................................................................................... 5 3.1 Bridged Local Area Network................................................................................................... 5 3.2 Expedited traffic....................................................................................................................... 5 3.3 Group ...................................................................................................................................... 5 3.4 IEEE 802 Local Area Network (LAN) .................................................................................... 5 4. Abbreviations.............................................................................................................................................. 7 5. Conformance............................................................................................................................................... 9 5.1 Required capabilities................................................................................................................ 9 5.2 Optional capabilities ................................................................................................................ 9 5.3 Protocol Implementation Conformance Statement.................................................................10 5.4 Recommendations..................................................................................................................10 5.5 MAC-specific bridging methods.............................................................................................10 6. Support of the MAC Service.......................................................................................................................11 6.1 Support of the MAC Service...................................................................................................11 6.2 Preservation of the MAC Service .......................................................................................... 12 6.3 Quality of Service maintenance............................................................................................. 12 6.4 Internal Sublayer Service provided within the MAC Bridge................................................. 16 6.5 Support of the Internal Sublayer Service by specific MAC procedures................................ 19 6.6 Filtering services in Bridged Local Area Networks .............................................................. 24 7. Principles of Bridge operation ................................................................................................................... 29 7.1 Bridge operation..................................................................................................................... 29 7.2 Bridge architecture................................................................................................................. 31 7.3 Model of operation................................................................................................................. 32 7.4 Port States and the active topology........................................................................................ 35 7.5 Frame reception ..................................................................................................................... 35 7.6 Frame transmission................................................................................................................ 37 7.7 The Forwarding Process ........................................................................................................ 37 7.8 The Learning Process............................................................................................................. 41 7.9 The Filtering Database........................................................................................................... 42 7.10 Spanning Tree Protocol Entity and GARP Entities ............................................................... 49 7.11 Bridge management ............................................................................................................... 49 7.12 Addressing ............................................................................................................................. 49 8. Spanning tree algorithm and protocol........................................................................................................ 57 9. Encoding of bridge protocol data units...................................................................................................... 59 9.1 Structure................................................................................................................................ 59 9.2 Encoding of parameter types ................................................................................................. 59 Copyright © 2004 IEEE. All rights reserved. vii 9.3 BPDU formats and parameters .............................................................................................. 61 10.GARP Multicast Registration Protocol (GMRP)...................................................................................... 67 10.1 Purpose.................................................................................................................................. 67 10.2 Model of operation................................................................................................................. 67 10.3 Definition of the GMRP Application..................................................................................... 70 10.4 Conformance to GMRP ......................................................................................................... 72 11.Example “C” code implementation of GMRP.......................................................................................... 75 12.Generic Attribute Registration Protocol (GARP) ..................................................................................... 77 12.1 GARP overview..................................................................................................................... 77 12.2 GARP architecture ................................................................................................................. 79 12.3 Requirements to be met by GARP......................................................................................... 82 12.4 Requirements for interoperability between GARP Participants ............................................ 83 12.5 Conformance to GARP Applications..................................................................................... 83 12.6 Protocol Operation ................................................................................................................. 84 12.7 State machine descriptions..................................................................................................... 90 12.8 Administrative controls.......................................................................................................... 95 12.9 Procedures............................................................................................................................. 96 12.10 Structure and encoding of GARP Protocol Data Units........................................................ 101 12.11 Timer values, granularity and relationships......................................................................... 106 12.12 Interoperability considerations............................................................................................. 106 13.Example “C” code implementation of GARP ........................................................................................ 109 14.Bridge management ............................................................................................................................... 111 14.1 Management functions......................................................................................................... 111 14.2 Managed objects .................................................................................................................. 112 14.3 Data types............................................................................................................................ 112 14.4 Bridge Management Entity .................................................................................................. 113 14.5 MAC Entities ....................................................................................................................... 116 14.6 Forwarding Process.............................................................................................................. 116 14.7 Filtering Database ................................................................................................................ 119 14.8 Spanning Tree Protocol Entity............................................................................................. 123 14.9 GARP Entities...................................................................................................................... 127 14.10 GMRP entities...................................................................................................................... 129 15.Management protocol ............................................................................................................................. 133 16.Bridge performance ............................................................................................................................... 135 16.1 Guaranteed Port Filtering Rate ............................................................................................ 135 16.2 Guaranteed Bridge Relaying Rate ....................................................................................... 135 17.Rapid Spanning Tree Protocol (RSTP)................................................................................................... 137 17.1 Protocol design requirements............................................................................................... 137 17.2 Protocol support requirements ............................................................................................. 138 17.3 RSTP overview .................................................................................................................... 138 17.4 STP compatibility ................................................................................................................ 143 17.5 Spanning tree priority vectors.............................................................................................. 143 17.6 Priority vector calculations .................................................................................................. 143 viii Copyright © 2004 IEEE. All rights reserved. 17.7 Port Role assignments.......................................................................................................... 145 17.8 Communicating spanning tree information ......................................................................... 145 17.9 Changing spanning tree information.................................................................................... 145 17.10 Changing Port States............................................................................................................ 146 17.11 Updating learned station location information .................................................................... 148 17.12 RSTP and point-to-point links ............................................................................................. 151 17.13 RSTP performance parameters ............................................................................................ 151 17.14 Performance parameter management................................................................................... 153 17.15 Rapid Spanning Tree state machines ................................................................................... 155 17.16 Notational conventions used in state diagrams.................................................................... 155 17.17 State machine timers ............................................................................................................ 157 17.18 Per-Bridge variables............................................................................................................. 158 17.19 Per-Port variables................................................................................................................. 159 17.20 State machine conditions and parameters ............................................................................ 164 17.21 State machine procedures .................................................................................................... 165 17.22 Port Timers state machine.................................................................................................... 170 17.23 Port Receive state machine .................................................................................................. 170 17.24 Port Protocol Migration state machine ................................................................................ 171 17.25 Bridge Detection state machine ........................................................................................... 171 17.26 Port Transmit state machine................................................................................................. 172 17.27 Port Information state machine............................................................................................ 173 17.28 Port Role Selection state machine........................................................................................ 174 17.29 Port Role Transitions state machine .................................................................................... 174 17.30 Port State Transition state machine...................................................................................... 177 17.31 Topology Change state machine.......................................................................................... 178 17.32 RSTP performance requirements......................................................................................... 179 ...展开收缩
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