Recommendation ITU-T G.7714.1/Y.1705.1 Amendment 1 (05/2021) Protocol for automatic discovery in transport networks
Summary
FOREWORD
Table of Contents
1 Scope
2 References
3 Definitions
     3.1 Terms defined elsewhere
     3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Discovery methodology
     5.1 CP-CP connectivity relationships determination
6 Mechanisms for layer adjacency discovery
     6.1 Layer adjacency discovery of transport entities
7 Attributes used in layer adjacency
8 Layer adjacency based on trail trace string
     8.1 Discovery message formats
          8.1.1 TCP name format
          8.1.2 DA DCN address format
          8.1.3 DA DCN name format
          8.1.4 ETH MAC address format
9 Layer adjacency based on embedded control channel messages
     9.1 LAPD-based mechanism
     9.2 PPP-based mechanism
     9.3 Interoperable solution when using ECC based mechanism
     9.4 PPP-based support in OTN ECC
          9.4.1 LLDP/PPP
          9.4.2 LLDP/MAC/PPP
10 Layer adjacency based on packet OAM frames
     10.1 Ethernet link discovery mechanism
     10.2 MPLS-TP transport entity discovery mechanism
11 Procedures
12 Discovery response message
     12.1 Miswiring detection
     12.2 Misconnection detection
Appendix I  Implementation example of discovery process
     I.1 Layer adjacency discovery information flow
Appendix II  Miswiring detection
     II.1 Auto-discovery procedures
     II.2 Example: Interaction between two DAs using different DM formats
Appendix III  Example of discovery response message using a generalized multi-protocol label signalling-based mechanism
Appendix IV  Layer adjacency discovery implementation examples
Appendix V  In-band message encoding example
Appendix VI  Usage of the different discovery mechanisms
     VI.1 Introduction
     VI.2 Categories of Type 1 layer adjacency discovery use cases
     VI.3 Use cases and scenarios
          VI.3.1 All NEs are auto-discovery capable (ubiquitous deployment)
          VI.3.2 All NEs are not auto-discovery capable
               VI.3.2.1 Auto-discovery between LAD-capable NEs
               VI.3.2.2 Auto-discovery between a LAD-capable NE and a non-LAD-capable NE
     VI.4 Guidelines for mechanisms and procedures
          VI.4.1 ECC-based LAD
               VI.4.1.1 DCN deployment scenarios impacting the availability of DCCs
          VI.4.2 Trail-trace-based LAD
               VI.4.2.1 Pre-service and out-of-service cases
               VI.4.2.2 In-service cases
          VI.4.3 Inter-carrier, user-provider implications
Bibliography
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