orsline 2006-12-31 16:43
ieee802-1ag-d7草案，关于以太网OAM的标准草案（正式版本还没出来，供有需要的人）
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【资料成文时间】：206-8
【语言】：english
【页数】：250
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【文件原名】：802-1ag-d7
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Contents
Editors’ Foreword .................................................................................................. iii
1. Overview ............................................................................................................................................ 1
1.1 Scope ...................................................................................................................................... 1
2. References .......................................................................................................................................... 3
3. Definitions ......................................................................................................................................... 4
4. Abbreviations ..................................................................................................................................... 7
5. Conformance ...................................................................................................................................... 8
6. Support of the MAC Service in VLANs ........................................................................................... 10
6.1 Basic architectural concepts and terms ................................................................................. 10
6.1.1 Protocol entities, peers, layers, services, and clients ............................................................10
6.1.2 Service interface primitives, parameters, and frames ...........................................................11
6.1.3 Layer management interfaces ...............................................................................................11
6.1.4 Service access points, interface stacks, and ports ................................................................12
6.1.5 Media independent protocols and shims ..............................................................................12
6.1.6 MAC Service clients ............................................................................................................13
6.1.7 Stations and systems .............................................................................................................13
6.1.8 Connectionless connectivity .................................................................................................13
6.2 Provision of the MAC service .............................................................................................. 13
6.3 Support of the MAC service ................................................................................................. 14
6.12 EISS Multiplex Entity ........................................................................................................... 15
8. Principles of bridge operation ........................................................................................................... 17
8.3 Model of operation ................................................................................................................ 17
8.6.7 Queue management ..............................................................................................................17
8.12 Bridge management entity. ................................................................................................... 17
8.13 Addressing ............................................................................................................................ 17
8.13.11 Connectivity Fault Management entities ..............................................................................17
9. Tagged frame format ........................................................................................................................ 20
12. Bridge management .......................................................................................................................... 21
12.1.1 Configuration management ..................................................................................................21
12.1.2 Fault management ................................................................................................................21
12.2 Managed objects ................................................................................................................... 21
12.14 CFM entities ......................................................................................................................... 21
12.14.1 Maintenance Domain list managed object ...........................................................................22
12.14.2 CFM Stack managed object .................................................................................................24
12.14.3 Default MD Level managed object ......................................................................................24
12.14.4 Configuration Error List managed object .............................................................................26
12.14.5 Maintenance Domain managed object .................................................................................26
12.14.6 Maintenance Association managed object ...........................................................................28
12.14.7 Maintenance association End Point managed object ...........................................................31
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xviii
This is an unapproved IEEE Standards Draft, subject to change.
13. The Multiple Spanning Tree Protocol .............................................................................................. 38
15. Support of the MAC Service by Provider Bridged Networks .......................................................... 39
15.10 Connectivity Fault Management ........................................................................................... 39
17. Connectivity Fault Management MIB definitions ............................................................................ 40
17.1 The Internet Standard Management Framework .................................................................. 40
17.2 Relationship with the managed objects definitions .............................................................. 40
17.3 Relationship to other MIB modules ...................................................................................... 43
17.4 Security ................................................................................................................................ 44
17.5 Definitions for the Connectivity Fault Management MIB .................................................... 46
18. Principles of Connectivity Fault Management operation ............................................................... 110
18.1 Maintenance Domains and Domain Service Access Points ............................................... 111
18.2 Service instances and Maintenance Associations ............................................................... 112
18.3 Maintenance Domain Levels .............................................................................................. 114
19. CFM Entity operation ..................................................................................................................... 118
19.1 Maintenance Points ............................................................................................................. 118
19.2 Maintenance association End Point .................................................................................... 119
19.2.1 MEP identification .............................................................................................................119
19.2.2 MEP functions ....................................................................................................................119
19.2.3 MEP architecture ................................................................................................................120
19.2.4 MP Type Demultiplexer .....................................................................................................120
19.2.5 MP Multiplexer ..................................................................................................................120
19.2.6 MP Level Demultiplexer ....................................................................................................121
19.2.7 MP OpCode Demultiplexer ................................................................................................122
19.2.8 MEP Continuity Check Receiver .......................................................................................122
19.2.9 MEP Continuity Check Initiator ........................................................................................123
19.2.10 MP Loopback Responder ...................................................................................................123
19.2.11 MEP Loopback Initiator .....................................................................................................123
19.2.12 MEP Linktrace Initiator .....................................................................................................123
19.2.13 MEP LTR SAP ...................................................................................................................123
19.2.14 MEP Linktrace SAP ...........................................................................................................123
19.2.15 MEP CCM Database ..........................................................................................................123
19.2.16 MEP Fault Notification Generator .....................................................................................124
19.3 MIP Half Function .............................................................................................................. 124
19.3.1 MHF identification .............................................................................................................124
19.3.2 MHF functions ...................................................................................................................124
19.3.3 MHF architecture ...............................................................................................................125
19.3.4 MHF Level Demultiplexer .................................................................................................125
19.3.5 MHF Type Demultiplexer ..................................................................................................125
19.3.6 MHF OpCode Demultiplexer .............................................................................................126
19.3.7 MHF Multiplexer ...............................................................................................................126
19.3.8 MHF Loopback Responder ................................................................................................126
19.3.9 MHF Continuity Check Receiver .......................................................................................126
19.3.10 MIP CCM Database ...........................................................................................................126
19.3.11 MHF Linktrace SAP ...........................................................................................................126
19.4 Maintenance Point addressing ............................................................................................ 126
19.5 Linktrace Output Multiplexer ............................................................................................. 127
19.6 Linktrace Responder ........................................................................................................... 128
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xix
This is an unapproved IEEE Standards Draft, subject to change.
20. Connectivity Fault Management protocols ..................................................................................... 130
20.1 Continuity Check protocol .................................................................................................. 131
20.1.1 MAC status reporting in the CCM .....................................................................................132
20.1.2 Defects and Fault Alarms ...................................................................................................133
20.1.3 CCM reception ...................................................................................................................134
20.2 Loopback protocol .............................................................................................................. 134
20.2.1 Loopback Message transmission ........................................................................................134
20.2.2 Loopback Message reception and Loopback Reply transmission ......................................134
20.2.3 Loopback Reply reception ..................................................................................................135
20.3 Linktrace protocol ............................................................................................................... 135
20.3.1 Linktrace Message origination ...........................................................................................136
20.3.2 Linktrace Message reception, forwarding, and replying ....................................................136
20.3.3 Linktrace Reply reception ..................................................................................................138
20.4 Connectivity Fault Management state machines ................................................................ 139
20.5 CFM state machine timers .................................................................................................. 139
20.5.1 LTFwhile ............................................................................................................................140
20.5.2 CCIwhile ............................................................................................................................140
20.5.3 errorCCMwhile ..................................................................................................................140
20.5.4 xconCCMwhile ..................................................................................................................140
20.5.5 LBIwhile .............................................................................................................................140
20.5.6 fngWhile .............................................................................................................................140
20.5.7 rMEPwhile .........................................................................................................................140
20.6 Maintenance Domain variable ............................................................................................ 141
20.6.1 mdLevel ..............................................................................................................................141
20.7 Maintenance Association variables .................................................................................... 141
20.7.1 CCIinterval .........................................................................................................................141
20.8 MEP variables ..................................................................................................................... 141
20.8.1 MEPactive ..........................................................................................................................141
20.8.2 enableRmepDefect .............................................................................................................141
20.8.3 MAdefectIndication ............................................................................................................142
20.8.4 allRMEPsDead ...................................................................................................................142
20.8.5 lowestAlarmPri ...................................................................................................................142
20.9 MEP Continuity Check Initiator variables .......................................................................... 142
20.9.1 CCIenabled .........................................................................................................................143
20.9.2 CCIsentCCMs ....................................................................................................................143
20.9.3 MACstatusChanged ...........................................................................................................143
20.10 MEP Continuity Check Initiator procedures ...................................................................... 143
20.10.1 xmitCCM() .........................................................................................................................143
20.11 MEP Continuity Check Initiator state machine .................................................................. 144
20.12 MHF Continuity Check Receiver variables ........................................................................ 144
20.12.1 MHFrecvdCCM .................................................................................................................144
20.12.2 MHFCCMPDU ..................................................................................................................144
20.13 MHF Continuity Check Receiver procedures ..................................................................... 144
20.13.1 MHFprocessCCM() ............................................................................................................145
20.14 MHF Continuity Check Receiver state machine ................................................................ 145
20.15 MEP Continuity Check Receiver variables ........................................................................ 145
20.15.1 CCMreceivedEqual ............................................................................................................145
20.15.2 CCMequalPDU ..................................................................................................................145
20.15.3 CCMreceivedLow ..............................................................................................................146
20.15.4 CCMlowPDU .....................................................................................................................146
20.15.5 recvdMacAddress ...............................................................................................................146
20.15.6 recvdRDI ............................................................................................................................146
20.15.7 recvdInterval .......................................................................................................................146
20.15.8 recvdPortState ....................................................................................................................146
20.15.9 recvdInterfaceStatus ...........................................................................................................146
20.15.10 recvdFrame .........................................................................................................................146
20.16 MEP Continuity Check Receiver procedures ..................................................................... 146
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xx
This is an unapproved IEEE Standards Draft, subject to change.
20.16.1 MEPprocessEqualCCM() ...................................................................................................147
20.16.2 MEPprocessLowCCM() .....................................................................................................147
20.17 MEP Continuity Check Receiver state machine ................................................................. 148
20.18 Remote MEP variables ....................................................................................................... 148
20.18.1 rMEPCCMdefect ................................................................................................................148
20.18.2 rMEPlastRDI ......................................................................................................................148
20.18.3 rMEPlastPortState ..............................................................................................................149
20.18.4 rMEPlastInterfaceStatus .....................................................................................................149
20.18.5 rCCMreceived ....................................................................................................................149
20.18.6 rCCMsequenceErrors .........................................................................................................149
20.18.7 rMEPmacAddress ...............................................................................................................149
20.18.8 rMEPportStatusDefect .......................................................................................................149
20.18.9 rMEPinterfaceStatusDefect ................................................................................................149
20.19 Remote MEP state machine ................................................................................................ 149
20.20 Remote MEP Error variables .............................................................................................. 149
20.20.1 errorCCMreceived ..............................................................................................................150
20.20.2 errorCCMlastFailure ..........................................................................................................150
20.20.3 errorCCMdefect ..................................................................................................................150
20.21 Remote MEP Error state machine ...................................................................................... 151
20.22 MEP Cross Connect variables ............................................................................................ 151
20.22.1 xconCCMreceived ..............................................................................................................151
20.22.2 xconCCMlastFailure ..........................................................................................................151
20.22.3 xconCCMdefect .................................................................................................................151
20.23 MEP Cross Connect state machine ..................................................................................... 152
20.24 MP Loopback Responder variables .................................................................................... 152
20.24.1 LBMreceived ......................................................................................................................152
20.24.2 LBMPDU ...........................................................................................................................152
20.25 MP Loopback Responder procedures ................................................................................. 152
20.25.1 ProcessLBM() ....................................................................................................................153
20.25.2 xmitLBR() ..........................................................................................................................153
20.26 MP Loopback Responder state machine ............................................................................. 153
20.27 MEP Loopback Initiator variables ...................................................................................... 154
20.27.1 LBMsToSend .....................................................................................................................154
20.27.2 nextLBMtransID ................................................................................................................154
20.27.3 expectedLBRtransID ..........................................................................................................154
20.27.4 LBIactive ............................................................................................................................154
20.27.5 xmitReady ..........................................................................................................................154
20.27.6 LBRreceived .......................................................................................................................154
20.27.7 LBRPDU ............................................................................................................................154
20.28 MEP Loopback Initiator transmit procedures ..................................................................... 155
20.28.1 xmitLBM() .........................................................................................................................155
20.29 MEP Loopback Initiator transmit state machine ................................................................ 155
20.30 MEP Loopback Initiator receive procedures ...................................................................... 156
20.30.1 ProcessLBR() .....................................................................................................................156
20.31 MEP Loopback Initiator receive state machine .................................................................. 156
20.32 MEP Fault Notification Generator variables ...................................................................... 156
20.32.1 fngPriority ..........................................................................................................................157
20.32.2 fngDefect ............................................................................................................................157
20.32.3 fngAlarmTime ....................................................................................................................157
20.32.4 fngResetTime .....................................................................................................................157
20.32.5 someRMEPCCMdefect ......................................................................................................157
20.32.6 someMACstatusDefect .......................................................................................................157
20.32.7 someRDIdefect ...................................................................................................................157
20.32.8 highestDefectPri .................................................................................................................158
20.32.9 highestDefect ......................................................................................................................158
20.33 MEP Fault Notification Generator procedures ................................................................... 158
20.33.1 xmitFaultAlarm() ...............................................................................................................158
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xxi
This is an unapproved IEEE Standards Draft, subject to change.
20.34 MEP Fault Notification Generator state machine ............................................................... 158
20.35 MEP Linktrace Initiator variables ....................................................................................... 158
20.35.1 nextLTMtransID .................................................................................................................158
20.35.2 ltmReplyList .......................................................................................................................158
20.36 MEP Linktrace Initiator procedures ................................................................................... 161
20.36.1 xmitLTM() .........................................................................................................................161
20.37 MEP LTR Receiver variables ............................................................................................. 161
20.37.1 LTRreceived .......................................................................................................................162
20.37.2 LTRPDU ............................................................................................................................162
20.38 MEP LTR Receiver procedures .......................................................................................... 162
20.38.1 ProcessLTR() .....................................................................................................................162
20.39 MEP LTR Receiver state machine ...................................................................................... 162
20.40 Linktrace Responder variables ............................................................................................ 162
20.40.1 nPendingLTRs ....................................................................................................................163
20.40.2 receivedLTM ......................................................................................................................163
20.41 LTM Receiver procedures .................................................................................................. 163
20.41.1 ProcessLTM() .....................................................................................................................163
20.41.2 clearPendingLTRs() ...........................................................................................................167
20.41.3 ForwardLTM() ...................................................................................................................167
20.41.4 enqueLTR() ........................................................................................................................168
20.41.5 xmitOldestLTR() ................................................................................................................169
20.42 LTM Receiver state machine .............................................................................................. 169
20.43 LTR Transmitter state machine .......................................................................................... 169
20.44 CFM PDU validation and versioning ................................................................................. 169
20.44.1 Goals of CFM PDU versioning ..........................................................................................169
20.44.2 PDU transmission ...............................................................................................................170
20.44.3 PDU validation ...................................................................................................................170
20.44.4 Validation pass ...................................................................................................................171
20.44.5 Execution pass ....................................................................................................................172
20.44.6 Future extensions ................................................................................................................172
20.45 PDU identification .............................................................................................................. 173
20.46 Use of transaction IDs and sequence numbers ................................................................... 173
21. Encoding of CFM Protocol Data Units ........................................................................................... 174
21.1 Structure, representation, and encoding .............................................................................. 174
21.2 CFM encapsulation ............................................................................................................. 174
21.3 CFM request and indication parameters ............................................................................. 175
21.3.1 destination_address parameter ...........................................................................................175
21.3.2 source_address parameter ...................................................................................................175
21.4 Common CFM Header ........................................................................................................ 175
21.4.1 MD Level ...........................................................................................................................176
21.4.2 Version ...............................................................................................................................176
21.4.3 OpCode ...............................................................................................................................176
21.4.4 Flags ..................................................................................................................................176
21.4.5 First TLV Offset .................................................................................................................177
21.5 TLV Format ........................................................................................................................ 177
21.5.1 General format for CFM TLVs ..........................................................................................177
21.5.2 Organization-Specific TLV ................................................................................................178
21.5.3 Sender ID TLV ...................................................................................................................178
21.5.4 Port Status TLV ..................................................................................................................179
21.5.5 Interface Status TLV ..........................................................................................................180
21.5.6 Data TLV ............................................................................................................................180
21.5.7 End TLV .............................................................................................................................181
21.6 Continuity Check Message format ..................................................................................... 181
21.6.1 Flags ..................................................................................................................................181
21.6.2 First TLV Offset .................................................................................................................182
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xxii
This is an unapproved IEEE Standards Draft, subject to change.
21.6.3 Sequence Number ...............................................................................................................183
21.6.4 Maintenance association End Point Identifier ....................................................................183
21.6.5 Maintenance Domain Name Format ..................................................................................183
21.6.6 Maintenance Domain Name Length ...................................................................................184
21.6.7 Maintenance Domain Name ...............................................................................................184
21.6.8 Short MA Name Format .....................................................................................................184
21.6.9 Short MA Name Length .....................................................................................................184
21.6.10 Short MA Name .................................................................................................................184
21.6.11 Optional CCM TLVs ..........................................................................................................184
21.7 Loopback Message and Loopback Reply formats .............................................................. 185
21.7.1 Flags ..................................................................................................................................185
21.7.2 First TLV Offset .................................................................................................................185
21.7.3 Loopback Transaction Identifier ........................................................................................185
21.7.4 Optional LBM/LBR TLVs .................................................................................................185
21.8 Linktrace Message Format .................................................................................................. 186
21.8.1 Flags ..................................................................................................................................186
21.8.2 First TLV Offset .................................................................................................................186
21.8.3 LTM Transaction Identifier ................................................................................................187
21.8.4 Egress Identifier .................................................................................................................187
21.8.5 LTM TTL ...........................................................................................................................187
21.8.6 Original MAC Address ......................................................................................................187
21.8.7 Target MAC Address .........................................................................................................187
21.8.8 Additional LTM TLVs .......................................................................................................187
21.9 Linktrace Reply Format ...................................................................................................... 188
21.9.1 Flags ..................................................................................................................................188
21.9.2 First TLV Offset .................................................................................................................188
21.9.3 LTR Transaction Identifier .................................................................................................189
21.9.4 Last Egress Identifier ..........................................................................................................189
21.9.5 Next Egress Identifier .........................................................................................................189
21.9.6 Reply TTL ..........................................................................................................................189
21.9.7 Relay Action .......................................................................................................................189
21.9.8 Additional LTR TLVs ........................................................................................................189
21.9.9 Reply Ingress TLV .............................................................................................................190
21.9.10 Reply Egress TLV ..............................................................................................................191
22. CFM in systems .............................................................................................................................. 193
22.1 CFM shims in Bridges ........................................................................................................ 193
22.1.1 Preliminary positioning of Maintenance Points .................................................................193
22.1.2 CFM and the Forwarding Process ......................................................................................194
22.1.3 Up/Down separation of Maintenance Points ......................................................................195
22.1.4 Service instances over multiple Bridges ............................................................................198
22.1.5 Multiple VID service instances ..........................................................................................198
22.1.6 Untagged CFM PDUs ........................................................................................................199
22.1.7 Maintenance Points and non-VLAN aware Bridges ..........................................................199
22.1.8 Maintenance Points and other standards ............................................................................200
22.1.9 CFM and IEEE 802.3 Clause 57 OAM ..............................................................................202
22.2 Maintenance Entity creation ............................................................................................... 202
22.2.1 Creating Maintenance Domains and Maintenance Associations .......................................203
22.2.2 Creating MEPs ...................................................................................................................203
22.2.3 Creating MIPs ....................................................................................................................203
22.2.4 CFM configuration errors ...................................................................................................205
22.3 MPs, Ports, and MD Level assignment ............................................................................... 206
22.4 Stations and Connectivity Fault Management .................................................................... 207
22.5 Scalability of Connectivity Fault Management .................................................................. 207
22.6 CFM in Provider Bridges .................................................................................................... 208
22.6.1 Maintenance Points and C-VLAN components .................................................................208
22.6.2 Maintenance C-VLAN on a Port-based service interface ..................................................209
Connectivity Fault Management IEEE P802.1ag/D7
August 22, 2006
Copyright © 2003 IEEE. All rights reserved. xxiii
This is an unapproved IEEE Standards Draft, subject to change.
22.6.3 Maintenance C-VLAN on a C-tagged service interface ....................................................210
22.7 MP addressing: Individual and Shared MP addresses ........................................................ 210
22.7.1 Individual MP address model .............................................................................................211
22.7.2 Shared MP address model and the CFM Port ....................................................................211
22.8 Management Port MEPs and CFM in the enterprise environment ..................................... 214
22.9 Implementing CFM on existing Bridges ............................................................................ 215
Annex A (normative) PICS Proforma .................................................................................................... 217
Annex L (informative) Connectivity Fault Management protocol design and use .................................. 223
Annex Y (informative) Bibliography ....................................................................................................... 227
Annex Z (informative) Commentary ........................................................................................................ 228
(请保留上面有用的说明选项，无用的请删除！！！)
[[i] 本帖最后由 orsline 于 2006-12-31 16:54 编辑 [/i]]
shjimmy 2007-1-15 09:47
相当不错，ag应该是所有以太网厂商都在关注的东东。
qiaofenger 2007-11-7 16:43
可惜~
没有那么多CNTTR币！