netman 2008-4-13 19:21
IEEE Std 802.1ad™-2005
【资料成文时间】：2006.5.26
【语言】：English
【页数】： 74
【何人（公司）所著】： IEEE
【文件格式】： PDF
【文件原名】：IEEE Std 802.1ad™-2005 Virtual Bridged Local Area Networks Amendment 4: Provider Bridges
【摘要或目录】：
Contents
1. Overview............................................................................................................................................ 1
1.1 Scope........................................................................................................................................... 1
3. Definitions ......................................................................................................................................... 3
4. Abbreviations.................................................................................................................................... 5
5. Conformance...................................................................................................................................... 6
5.2 Conformant components and equipment ..................................................................................... 6
5.3 Protocol Implementation Conformance Statement (PICS).......................................................... 6
5.4 VLAN-aware Bridge component requirements ........................................................................... 6
5.5 C-VLAN component conformance.............................................................................................. 7
5.6 S-VLAN component conformance .............................................................................................. 7
5.7 VLAN Bridge conformance......................................................................................................... 8
5.8 Provider Bridge conformance ...................................................................................................... 8
6. Support of the MAC Service in VLANs........................................................................................... 10
6.6 Enhanced Internal Sublayer Service .......................................................................................... 10
6.7 Support of the EISS ................................................................................................................... 10
6.9 Support of the ISS for attachment to a Provider Bridged Network ........................................... 13
6.10 Support of the ISS within a system........................................................................................... 16
6.11 Support of the ISS by additional technologies.......................................................................... 16
8. Principles of bridge operation........................................................................................................... 17
8.1 Bridge operation ........................................................................................................................ 17
8.6 The Forwarding Process ............................................................................................................ 17
8.12 Bridge Management Entity....................................................................................................... 20
8.13 Addressing ............................................................................................................................... 20
9. Tagged frame format ........................................................................................................................ 22
9.5 Tag Protocol Identification ........................................................................................................ 22
9.6 Customer VLAN Tag Control Information ............................................................................... 22
9.7 Service VLAN Tag Control Information................................................................................... 23
9.8 Embedded Routing Information Field (E-RIF) ......................................................................... 23
11. VLAN topology management........................................................................................................... 24
12. Bridge management .......................................................................................................................... 25
12.13 Provider Bridge management .................................................................................................. 31
13. The Multiple Spanning Tree Protocol (MSTP) ................................................................................ 38
13.38 Customer Edge Port Spanning Tree operation......................................................................... 38
xii Copyright © 2006 IEEE. All rights reserved.
15. Support of the MAC Service by Provider Bridged Networks .......................................................... 40
15.1 Service transparency .................................................................................................................. 40
15.2 Customer service interfaces ....................................................................................................... 41
15.3 Port-based service interface ....................................................................................................... 41
15.4 C-tagged service interface ......................................................................................................... 42
15.5 S-tagged service interface .......................................................................................................... 43
15.6 Service instance segregation...................................................................................................... 44
15.7 Service instance selection and identification ............................................................................. 44
15.8 Service priority selection ........................................................................................................... 45
15.9 Service access protection ........................................................................................................... 45
16. Principles of Provider Bridged Network operation .......................................................................... 46
16.1 Provider Bridged Network overview......................................................................................... 46
16.2 Provider Bridged Network......................................................................................................... 47
16.3 Service instance connectivity..................................................................................................... 48
16.4 Service provider learning of customer end station addresses .................................................... 49
16.5 Detection of connectivity loops through attached networks...................................................... 49
16.6 Network management ................................................................................................................ 50
Annex A (normative) PICS proforma............................................................................................................ 51
Annex G (informative) Priority and drop precedence ................................................................................... 56
Annex H (informative) Bibliography ............................................................................................................ 60