Recommendation ITU-T G.8021/Y.1341 Amendment 1 (01/2024) Characteristics of Ethernet transport network equipment functional blocks 
Summary
History
FOREWORD
Table of Contents
Introduction
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Methodology and conventions
6 Supervision
     6.1 Defects
          6.1.1 Summary of detection and clearance conditions for defects
          6.1.2 Continuity supervision
               6.1.2.1 Loss of continuity defect (dLOC[])
          6.1.3 Connectivity supervision
               6.1.3.1 Unexpected MEL defect (dUNL)
               6.1.3.2 Mismerge defect (dMMG)
               6.1.3.3 Unexpected MEP defect (dUNM)
               6.1.3.4 Degraded signal defect (dDEG)
          6.1.4 Protocol supervision
               6.1.4.1 Unexpected periodicity defect (dUNP)
               6.1.4.2 Unexpected priority defect (dUNPr)
               6.1.4.3 Protection protocol supervision
                    6.1.4.3.1 Linear or ring protection failure of protocol provisioning mismatch (dFOP-PM)
                    6.1.4.3.2 Linear protection failure of protocol no response (dFOP-NR)
                    6.1.4.3.3 Linear protection failure of protocol configuration mismatch (dFOP-CM)
                    6.1.4.3.4 Linear or ring protection failure of protocol time out (dFOP-TO)
          6.1.5 Maintenance signal supervision
               6.1.5.1 Remote defect indicator defect (dRDI[])
               6.1.5.2 Alarm indication signal defect (dAIS)
               6.1.5.3 Locked defect (dLCK)
               6.1.5.4 Client signal fail defect (dCSF)
     6.2 Consequent actions
     6.3 Defect correlations
7 Information flow across reference points
8 Generic processes for Ethernet equipment
     8.1 OAM related processes
          8.1.1 OAM MEL filter
          8.1.2 LCK generation process
          8.1.3 Selector process
          8.1.4 AIS insert process
          8.1.5 APS insert process
          8.1.6 APS extract process
          8.1.7 Continuity check (CC) processes
               8.1.7.1 Overview
               8.1.7.2 CCM generation process
               8.1.7.3 CCM reception process
               8.1.7.4 Counter process
               8.1.7.5 Proactive loss measurement (LMp) process
          8.1.8 Loopback (LB) processes
               8.1.8.1 Overview
               8.1.8.2 LB control process
               8.1.8.3 LBM generation process
               8.1.8.4 MIP LBM reception process
               8.1.8.5 MEP LBM reception process
               8.1.8.6 LBR generation process
               8.1.8.7 LBR reception process
          8.1.9 Loss measurement (LM) processes
               8.1.9.1 Overview
               8.1.9.2 LM control process
               8.1.9.3 LMM generation process
               8.1.9.4 LMM reception process
               8.1.9.5 LMR generation process
               8.1.9.6 LMR reception process
               8.1.9.7 Counter process
          8.1.10 Single-ended delay measurement (DM) processes
               8.1.10.1 Overview
               8.1.10.2 DM control process
               8.1.10.3 DMM generation process
               8.1.10.4 DMM reception process
               8.1.10.5 DMR generation process
               8.1.10.6 DMR reception process
          8.1.11 Dual-ended delay measurement (1DM) processes
               8.1.11.1 Overview
               8.1.11.2 1DM Control_So Process
               8.1.11.3 1DM generation process
               8.1.11.4 1DM reception process
               8.1.11.5 1DM Control_Sk Process
          8.1.12 Test (TST) processes
               8.1.12.1 Overview
               8.1.12.2 TST Control_So process
               8.1.12.3 TST generation process
               8.1.12.4 TST reception process
               8.1.12.5 TST Control_Sk process
          8.1.13 Link trace (LT) processes
               8.1.13.1 Overview
               8.1.13.2 LT control process
               8.1.13.3 LTM generation process
               8.1.13.4 MIP LTM reception process
               8.1.13.5 MEP LTM reception process
               8.1.13.6 LTR generation process
               8.1.13.7 LTR reception process
          8.1.14 Single-ended synthetic loss measurement (SL) processes
               8.1.14.1 Overview
               8.1.14.2 SL control process
               8.1.14.3 SLM generation process
               8.1.14.4 SLM reception process
               8.1.14.5 SLR generation process
               8.1.14.6 SLR reception process
          8.1.15 Dual-ended synthetic loss measurement (1SL) processes
               8.1.15.1 Overview
               8.1.15.2 1SL Control_So process
               8.1.15.3 1SL generation process
               8.1.15.4 1SL reception process
               8.1.15.5 1SL Control_Sk process
          8.1.16 CSF insert process
          8.1.17 CSF extract process
          8.1.18 BNM insert process
          8.1.19 BNM extract process
          8.1.20 Expected Defect (ED) processes
               8.1.20.1 Overview
               8.1.20.2 EDM Generation process
               8.1.20.3 EDM Reception process
     8.2 Queueing process
     8.3 Filter process
     8.4 Replicate process
     8.5 MAC length check process
     8.6 Server-specific processes
          8.6.1 802.3 MAC FCS generation process
          8.6.2 802.3 MAC FCS check process
          8.6.3 Link quality supervision
          8.6.4 ETH-specific GFP-F process
               8.6.4.1 ETH-specific GFP-F source process
               8.6.4.2 ETH-specific GFP-F sink process
9 Ethernet MAC layer (ETH) functions
     9.1 ETH connection (ETH_C) function
          9.1.1 ETH flow forwarding (ETH_FF) process
          9.1.2 Subnetwork connection protection process
          9.1.3 Ring protection control process
     9.2 ETH termination functions
          9.2.1 ETHx flow termination functions (ETHx_FT)
               9.2.1.1 ETHx flow termination source function (ETHx_FT_So)
               9.2.1.2 ETHx flow termination sink function (ETHx_FT_Sk)
          9.2.2 ETH group flow termination functions (ETHG_FT)
               9.2.2.1 ETH group flow termination source function (ETHG_FT_So)
               9.2.2.2 ETH group flow termination sink function (ETHG_FT_Sk)
          9.2.3 ETHnull flow termination functions (ETHnull_FT)
               9.2.3.1 ETHnull flow termination source function (ETHnull_FT_So)
               9.2.3.2 ETHnull flow termination sink function (ETHnull_FT_Sk)
     9.3 ETH adaptation functions
          9.3.1 ETH to ETH adaptation functions (ETHx/ETH_A)
               9.3.1.1 ETH to ETH adaptation source function (ETHx/ETH_A_So)
               9.3.1.2 ETH to ETH adaptation sink function (ETHx/ETH_A_Sk)
          9.3.2 ETH to ETH multiplexing adaptation functions (ETHx/ETH-m_A)
               9.3.2.1 ETH to ETH multiplexing adaptation source function (ETHx/ETH-m_A_So)
               9.3.2.2 ETH to ETH multiplexing adaptation sink function (ETHx/ETH-m_A_Sk)
          9.3.3 ETH group to ETH adaptation functions (ETHG/ETH_A)
               9.3.3.1 ETH group to ETH adaptation source function (ETHG/ETH_A_So)
               9.3.3.2 ETH group to ETH adaptation sink function (ETHG/ETH_A_Sk)
          9.3.4 ETHx to ETH group adaptation functions (ETHx/ETHG_A)
               9.3.4.1 ETHx to ETH group adaptation source function (ETHx/ETHG_A_So)
               9.3.4.2 ETHx to ETH group adaptation sink function (ETHx/ETHG_A_Sk)
          9.3.5 ETH to MCC adaptation functions (ETHx/MCC_A)
               9.3.5.1 ETH to MCC adaptation source function (ETHx/MCC_A_So)
               9.3.5.2 ETH to MCC adaptation sink function (ETHx/MCC_A_Sk)
     9.4 ETH diagnostic functions
          9.4.1 ETH diagnostic flow termination functions for MEPs (ETHDe_FT)
               9.4.1.1 ETH diagnostic flow termination source function for MEPs (ETHDe_FT_So)
               9.4.1.2 ETH diagnostic flow termination sink function for MEPs (ETHDe_FT_Sk)
          9.4.2 ETH diagnostic flow termination functions for MIPs (ETHDi_FT)
               9.4.2.1 ETH diagnostic flow termination source function for MIPs (ETHDi_FT_So)
               9.4.2.2 ETH diagnostic flow termination sink function for MIPs (ETHDi_FT_Sk)
          9.4.3 ETHD to ETH adaptation functions (ETHD/ETH_A)
               9.4.3.1 ETHD to ETH adaptation source function (ETHD/ETH_A_So)
               9.4.3.2 ETHD to ETH adaptation sink function (ETHD/ETH_A_Sk)
          9.4.4 ETHDi to ETH adaptation functions (ETHDi/ETH_A)
               9.4.4.1 ETHDi to ETH adaptation source function (ETHDi/ETH_A_So)
               9.4.4.2 ETHDi to ETH adaptation sink function (ETHDi/ETH_A_Sk)
     9.5 Server to ETH adaptation functions (/ETH_A)
     9.6 ETH traffic conditioning and shaping functions (ETH_TCS)
          9.6.1 ETH traffic shaping function (ETH_TCS_So)
          9.6.2 ETH traffic conditioning function (ETH_TCS_Sk)
     9.7 ETH link aggregation functions
          9.7.1 ETH link aggregation layer flow termination function (ETH-LAG-Np-Na_FT)
               9.7.1.1 ETH link aggregation adaptation source function (ETHx-Np/ETH-LAG-Na_A_So)
               9.7.1.2 ETH link aggregation adaptation sink function (ETHx-Np/ETH-LAG-Na_A_Sk)
               9.7.1.3 ETH link aggregation flow termination source function (ETH-LAG_FT_So)
               9.7.1.4 ETH link aggregation flow termination sink function (ETH-LAG_FT_Sk)
          9.7.2 ETH-LAG to ETH adaptation function (ETH-LAG/ETH_A)
               9.7.2.1 ETH-LAG to ETH adaptation source function (ETH-LAG/ETH_A_So)
               9.7.2.2 ETH-LAG to ETH adaptation sink function (ETH-LAG/ETH_A_Sk)
     9.8 ETH MEP and MIP functions
          9.8.1 ETH NCM MEP function
          9.8.2 ETH TCM MEP function
          9.8.3 ETH MIP function
          9.8.4 ETH half MIP function
10 Ethernet server to ETH adaptation functions
11 Non-Ethernet server to ETH adaptation functions
     11.1 OTN to ETH adaptation functions
          11.1.1 ODUkP to ETH adaptation functions (ODUkP/ETH_A; k = 0, 1, 2, 3, 4, flex)
          11.1.2 ODU2P to Ethernet Reconciliation sublayer adaptation functions
          11.1.3 ODU0P to 1 GbE client adaptation functions (ODU0P/CBRx_A)
          11.1.4 ODUflexP to ETH client adaptation function using IMP (ODUflexP/ETH-imp_A)
Appendix I  Applications and functional diagrams
Appendix II  AIS/RDI mechanism for an Ethernet private line over a single OTN server layer
Appendix III  Compound functions
Appendix IV  Start-up conditions
Appendix V  SDL descriptions
Appendix VI  Calculation methods for frame loss measurement
     VI.1 Dual-ended loss measurement
     VI.2 Single-ended loss measurement
Appendix VII  Considerations of the support of a rooted multipoint EVC service
Appendix VIII  Configurations for ingress VID filtering
Appendix IX  Handling of Expected Defects
     IX.1 Interruption events
     IX.2 Service activation
     IX.3 Additional considerations
Appendix X  Mapping guidelines between the atomic functions defined in  b-ITU-T G.8021-2016 and those defined in ITU-T G.8023
Appendix XI  Basic Ethernet MAC layer network (ETH) equipment types
     XI.1 Provider edge bridge (PEB)
     XI.2 Provider bridge (PB)
Bibliography