1. 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

2. 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

3. 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 (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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. G.8032 Introduction of New NodeA 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

11. 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

12. 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