Marc Holness, Product Line Architect, Ciena Joint IEEE-SA and ITU Workshop on Ethernet ITU-T G-Series Supplement 52 Overview  G.8032 Usage and Operational Considerations Marc Holness, Product Line Architect, Ciena Geneva, Switzerland, 13 July 2013

Supplement 52 to ITU-T G-series Recommendation Provides supplemental information to Ethernet Ring Protection (ERP) Recommendation ITU-T G.8032 Ethernet services support Ring interconnections Network applications Guidelines for configuration and management procedures Multiple Ethernet ring protection instances protection switching End-to-end network/service resiliency involving G.8032 Geneva, Switzerland, 13 July 2013

G.8032 Overview G.8032 is an Ethernet ring protection protocol: Provides efficient network connectivity Provides rapid service restoration (sub 50ms protection) Provides ring interconnections Provides localized service restoration from a network fault Utilizes standard IEEE 802.1Q (bridging) and IEEE 802.3 (MAC) Is client and server layer agnostic Supports operator commands (e.g., manual/force switch, do not revert, clear, etc.) Geneva, Switzerland, 13 July 2013 3 3

G.8032 Basic Concepts A G.8032 ring is simply a logical construct that provides resiliency over a “closed loop” formed over a physical network infrastructure Multiple ERP instances (e.g., virtual rings) can be provided over a single G.8032 [logical] ring 4 4

G.8032 Support of E-LINE Services A 2-node G.8032 ring can provide linear protection switching in support of E-LINE services MAC learning can be enabled or disabled on the ring nodes 1+1 Linear Protection A B G.8032 CE1 CE2 F E D C A B G.8032 CE1 CE2 F E D C 1:1 Linear Protection Geneva, Switzerland, 13 July 2013 5 5

G.8032 Support of E-TREE Services G.8032 can act as a server layer providing resiliency (sub-50ms protection switching) for an E-TREE service A B G.8032 CE1 CE3 C D CE4 CE2 Root (A)  Leaf nodes Leaf  Root (A) Geneva, Switzerland, 13 July 2013 6 6

G.8032 Support of E-LAN Services G.8032 [naturally] supports services with a multipoint topology (e.g., E-LAN services) A B G.8032 CE15 F E D C CE10 CE14 CE13 CE12 CE11 A B G.8032 CE1 CE2 F E D C CE10 CE14 CE13 CE12 CE11 VR-1 VR-2 Geneva, Switzerland, 13 July 2013 7 7

G.8032 Ring Interconnections G.8032 defines two ring constructs {major-rings and sub-rings} which can be interconnected (much like “LEGO building blocks”) NOTE: Network loop freeness of active forwarding path is maintained (during normal state and during all protection switching events) for all interconnection scenarios. 8 8

G.8032 Network Applications G.8032 (with ring interconnection capabilities) can provide resilient (sub-50ms) service restoration for various network applications Site-to-site Layer 2 VPNs Ethernet Private Line Wholesale Ethernet access 3G/4G cell site Mobile Backhaul Ethernet access to IP services Delivery of Private Cloud services Residential services Geneva, Switzerland, 13 July 2013 9 9

G.8032 Introduction of New Node A B G.8032 E C D F FS applied at node A and E Fiber providing connection between nodes A & E disconnected New node (F) inserted Fiber connected between A-F and E-F FS cleared at nodes A and E G.8032 ring reverts back to normal 10 10

G.8032 End-to-end Resiliency G.8032 can act as a server layer providing rapid (sub-50ms) protection for higher layer protocols (e.g., G.8031, MPLS-TP, etc.) G.8032 can also provide Resilient dual-homed interconnect via a sub-ring interconnect of a non-ERP node (that is based on a standard L2 bridge) Service restoration when a non-ERP node (that is based on a standard L2 bridge) is participating in the ring Physical Infrastructure G.8032 Server Layer Client Layer Protection A 11 11

Summary Supplement 52 to ITU-T G-series Recommendations provides supplemental information to Recommendation ITU-T G.8032/Y.1344 (Ethernet ring protection switching) Ethernet services support Ring interconnections Network applications Guidelines for configuration and management procedures Multiple Ethernet ring protection instances protection switching End-to-end network/service resiliency involving G.8032 Approved September 2012 Geneva, Switzerland, 13 July 2013 12 12