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

Geneva, Switzerland, 2 13 July 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.

Geneva, Switzerland, 2 13 July 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.

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

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

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

Multi Domain example Geneva, Switzerland,13 July 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

Study points Geneva, Switzerland,13 July 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)

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

Geneva, Switzerland, 2 13 July Thank you Q & A