Rec. ITU-T G.8133 (08/2019) - Dual-homing protection for multi-protocol label switching transport profile pseudowires Summary History FOREWORD Table of Contents 1 Scope 2 References 3 Definitions 3.1 Terms defined elsewhere 3.2 Terms defined in this Recommendation 3.2.1 attachment circuit recovery domain: A recovery domain that is adjacent to the multi-protocol label switching transport profile (MPLS-TP) dual-homing protection domain and provides reliable transfer of information of the client traffic using two ... 3.2.2 dual-homing nodes: Two provider edge (PE) nodes that are dual homed to the same customer edge node to provide PE node resiliency at the boundary of the multi-protocol label switching transport profile transport network. 3.2.3 dual-node interconnection transport entity: The transport entity (i.e., pseudowire) established between dual-homing nodes. The dual-node interconnection transport entity is pre-established and used when there is a need for fast switchover. 3.2.4 multi-protocol label switching transport profile dual-homing protection domain: A recovery domain that uses the mechanisms described in this Recommendation to provide reliable transfer of information of client traffic through a multi-protocol la... 4 Abbreviations and acronyms 5 Conventions 6 Overview 7 Dual-homing protection architecture 7.1 One-side dual-homing 7.2 Two-side dual-homing 8 Protection signalling 9 Functional model 10 Hold-off timer 11 Wait-to-restore timer 12 Protection procedures 13 External commands 14 Failure detection Annex A Forwarding state tables of protection switching Appendix I One-side and two-side dual-homing protection examples I.1 One-side dual-homing I.2 Two-side dual-homing Appendix II Network objectives