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 2 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 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 Logical Ring 1 {A, B, G} B Virtual RingRing-1 (R-APS & Data Channels) G A Virtual RingRing-2 (R-APS & Data Channels) Logical Ring 2 {B, C, D, E, F, G} : D C B Virtual RingRing-N F G (R-APS & Data Channels) Logical Ring 3 {A, B, C, D, E, F, G} C D G F B D C B A : E E E F G over physical network infrastructure C D B A Logical Ring created E G F Physical Network H 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 C D C CE1 CE2 A B G.8032 F E 1+1 Linear Protection Geneva, Switzerland, 13 July 2013 D CE1 CE2 A B G.8032 F E 1:1 Linear Protection 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 CE2 CE2 C C CE1 CE3 A B G.8032 D Root (A) Leaf nodes Geneva, Switzerland, 13 July 2013 CE1 CE3 A CE4 B G.8032 D CE4 Leaf Root (A) 6 G.8032 Support of E-LAN Services G.8032 [naturally] supports services with a multipoint topology (e.g., E-LAN services) CE13 CE14 CE13 CE14 C D C D CE15 CE10 A CE1 CE2 A B G.8032 B G.8032 CE10 VR-1 F F E E VR-2 CE11 CE12 Geneva, Switzerland, 13 July 2013 CE11 CE12 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”) A B Ring G Ring1 Service Provider Network Y Ring2 SubSub-Ring C D Ring1 SubSub-Ring Ring2 E Service Provider Network X Ring NOTE: NOTE: The sub-ring in this case must be configured with the R-APS virtual channel. F SubSub-Ring1 SubSub-Ring2 SubSub-Ring Network (e.g., MPLS, MPLSMPLS-TP, VPLS, PBBPBBTE, xSTP, xSTP, etc.) NOTE: Network loop freeness of active forwarding path is maintained (during normal state and during all protection switching events) for all interconnection scenarios. 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 G.8032 (Access) G.8032 (Metro / Aggregation) Metro Transport G.8032 (Access) 9 G.8032 Introduction of New Node C A D C B G.8032 A D A F 5) 6) C B A E FS cleared at nodes A and E G.8032 ring reverts back to normal F 4) 2) Fiber providing connection between nodes A & E disconnected D C B G.8032 B G.8032 E FS applied at node A and E D G.8032 A D E 1) C B G.8032 E C A E Fiber connected between AF and E-F B G.8032 F 3) D E New node (F) inserted 10 G.8032 End-to-end Resiliency G.8032 can act as a server layer providing rapid (sub50ms) protection for higher layer protocols (e.g., G.8031, MPLS-TP, etc.) Client Layer Protection G.8032 Server Layer 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 A A 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