1. Geneva, Switzerland, 13 July 2013 M ulti D omain S egmented network P rotection (MDSP) Huub van Helvoort, Senior Researcher Huawei Technologies Joint IEEE-SA and ITU Workshop on Ethernet

2. Geneva, Switzerland, 2 13 July 2013 2 Introduction: G.MDSP 1. Describes end-to-end protection across multiple cascaded protected domains to support service survivability. 2. This is achieved via concatenation of multiple protection instances/segments in each protected domain.

3. Geneva, Switzerland, 2 13 July 2013 3 Introduction: G.MDSP (contd) 4. Both single node and dual node interconnection between protected domains are described. 3. Each protected domain may be in a different administrative domain and support protection using either the same or different layer networks.

4. Possible Scenarios Geneva, Switzerland,13 July 2013 4 Protected Domain Network-to-UNI UNI Network-to-ENI ENI Protected Domain Protected Domain Network-to-Network Protected Domain Protected Domain Protected Domain

5. Single node Interconnect Geneva, Switzerland,13 July 2013 5 Two protected domains interconnected by single node(s). Single point of failure!

6. Dual node Interconnect Geneva, Switzerland,13 July 2013 6 Two protected domains interconnected by dual node(s)

7. Multi Domain example Geneva, Switzerland,13 July 2013 7 Each domain has its own, technology based, protection mechanism. OTN (G.873.1/G.873.2) Segment protection 1Segment protection 2 End-to-end protection ETH (G.8031/G.8032) ETH (G.8031/G.8032) Segment protection 3 OTN DomainETH Domain

8. Study points Geneva, Switzerland,13 July 2013 8 End-to-end service survivability along the concatenated protected domain for each case: Identify domain interactions Node failure analysis (restrict to one domain, adjacent domains) Possible hold-off timers (end-to-end, per domain, technology dependent)

9. Conclusion Geneva, Switzerland,13 July 2013 9 The main objective for development of this recommendation is to define the interworking of protection mechanisms This is work in progress in Q9/SG15

10. Geneva, Switzerland, 2 13 July 2013 10 Thank you Q & A