ITU-T G.8013/Y.1731 (06/2023)

5.5 Representation of octets
6 OAM relationships
6.1 MEs, MEPs, MIPs and TrCPs relationship
6.2 MEs, MEGs and MEG level relationship
6.3 MEPs and MIPs configuration
7 OAM functions for fault management
7.1 Ethernet continuity check (ETH-CC)
7.2 Ethernet loopback (ETH-LB)
7.3 Ethernet link trace (ETH-LT)
7.4 Ethernet alarm indication signal (ETH-AIS)
7.5 Ethernet remote defect indication (ETH-RDI)
7.6 Ethernet locked signal (ETH-LCK)
7.7 Ethernet test signal (ETH-Test)
7.8 Ethernet automatic protection switching (ETH-APS)
7.9 Ethernet management communication channel (ETH-MCC)
7.10 Ethernet experimental OAM (ETH-EXP)
7.11 Ethernet vendor-specific OAM (ETH-VSP)
7.12 Ethernet client signal fail (ETH-CSF)
7.13 Ethernet bandwidth notification (ETH-BN)
7.14 Ethernet expected defect (ETH-ED)
8 OAM functions for performance monitoring
8.1 Ethernet frame loss measurement (ETH-LM)
8.2 Ethernet frame delay measurement (ETH-DM)
8.3 Throughput measurement
8.4 Ethernet synthetic loss measurement (ETH-SLM)
9 OAM PDU types
9.1 Common OAM information elements
9.2 CCM PDU
9.3 LBM PDU
9.4 LBR PDU
9.5 LTM PDU
9.6 LTR PDU
9.7 AIS PDU
9.8 LCK PDU
9.9 TST PDU
9.10 APS PDU
9.11 MCC PDU
9.12 LMM PDU
9.13 LMR PDU
9.14 1DM PDU
9.15 DMM PDU
9.16 DMR PDU
9.17 EXM PDU
9.18 EXR PDU
9.19 VSM PDU
9.20 VSR PDU
9.21 CSF PDU
9.22 SLM PDU
9.23 SLR PDU
9.24 1SL PDU
9.25 BNM PDU
9.26 EDM PDU
10 OAM frame addresses
10.1 Multicast destination addresses
10.2 CCM
10.3 LBM
10.4 LBR
10.5 LTM
10.6 LTR
10.7 AIS
10.8 LCK
10.9 TST
10.10 APS
10.11 MCC
10.12 LMM
10.13 LMR
10.14 1DM
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10.15 DMM
10.16 DMR
10.17 EXM
10.18 EXR
10.19 VSM
10.20 VSR
10.21 CSF
10.22 SLM
10.23 SLR
10.24 1SL
10.25 BNM
10.26 EDM
11 OAM PDU validation and versioning
11.1 OAM PDU transmission
11.2 OAM PDU validation in reception
11.3 OAM PDU reception after validation
Annex A – MEG ID format
A.1 ICC-based MEG_ID format
A.2 Global MEG ID format based on CC and ICC
Annex B – Ethernet link trace (ETH-LT) of ITU-T Y.1731 interoperability considerations
B.1 Ethernet link trace (ETH-LT) as specified in ITU-T Y.1731
B.2 Interworking with ITU-T Y.1731
Appendix I – Ethernet network scenarios
I.1 Shared MEG levels example
I.2 Independent MEG levels example
Appendix II – Frame loss measurement
II.1 Simplified calculation for frame loss
II.2 Frame counter wrapping periodicity
Appendix III – Network OAM interworking
Appendix IV – Mismerge detection limitation
Appendix V – Terminology alignment with IEEE 802.1Q
Appendix VI – Examples showing accuracy for ETH-SLM measurement
Appendix VII – ETH-LM and link aggregation
Bibliography

Recommendation ITU-T G.8013/Y.1731 provides mechanisms for user-plane OAM functionality in Ethernet networks according to the requirements and principles given in Recommendation ITU-T Y.1730.

This Recommendation specifies mechanisms required to operate and maintain the network and service aspects of the ETH layer.