Geneva, Switzerland, 13 July 2013
ITU-T G-Series Supplement 52 Overview G.8032 Usage and Operational Considerations
Marc Holness,Product Line Architect,
Ciena
Joint IEEE-SA and ITU Workshop on Ethernet
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 supportRing interconnectionsNetwork applicationsGuidelines for configuration and management proceduresMultiple Ethernet ring protection instances protection switchingEnd-to-end network/service resiliency involving G.8032
3
G.8032 OverviewG.8032 is an Ethernet ring protection protocol:
Provides efficient network connectivityProvides rapid service restoration (sub 50ms protection)Provides ring interconnectionsProvides localized service restoration from a network faultUtilizes 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
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G.8032 Basic ConceptsA G.8032 ring is simply a logical construct that provides resiliency over a “closed loop” formed over a physical network infrastructureMultiple ERP instances (e.g., virtual rings) can be provided over a single G.8032 [logical] ring
C D
FB E H
GA
Physical NetworkPhysical Network
C D
FB E H
GA
Physical NetworkPhysical Network
Logical Ring 2Logical Ring 2 {B, C, D, E, F, G}
C D
FB E
G
C D
FB E
G
C D
FEB
GA
C D
FEB
GA
Logical Ring 3Logical Ring 3 {A, B, C, D, E, F, G}
Logical Ring 1Logical Ring 1 {A, B, G}
A
BG
A
BG
Logical RingLogical Ring created over physical network infrastructure
C DB E
FG
Virtual RingVirtual Ring--11(R-APS & Data Channels)
::
Virtual RingVirtual Ring--22(R-APS & Data Channels)
Virtual RingVirtual Ring--NN(R-APS & Data Channels)
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G.8032 Support of E-LINE ServicesA 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
AA BBG.803G.80322
CE1CE1 CE2CE2
FF EE
DDCC
1:1 Linear Protection1+1 Linear Protection
AA BBG.803G.80322
CE1CE1 CE2CE2
FF EE
DDCC
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G.8032 Support of E-TREE ServicesG.8032 can act as a server layer providing resiliency (sub-50ms protection switching) for an E-TREE service
AA BBG.803G.80322
CE1CE1 CE3CE3
CC
DD CE4CE4
CE2CE2
AA BBG.803G.80322
CE1CE1 CE3CE3
CC
DD CE4CE4
CE2CE2
Root (A) Leaf nodes Leaf Root (A)
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G.8032 Support of E-LAN ServicesG.8032 [naturally] supports services with a multipoint topology (e.g., E-LAN services)
AA BBG.803G.80322
CE1CE155
FF EE
DDCC
CE1CE100
CE1CE144
CE1CE133
CE1CE122
CE1CE111
AA BBG.803G.80322
CE1CE1CE2CE2
FF EE
DDCC
CE1CE100
CE1CE144
CE1CE133
CE1CE122
CE1CE111
VR-1VR-1
VR-2VR-2
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G.8032 Ring InterconnectionsG.8032 defines two ring constructs {major-rings and sub-rings} which can be interconnected (much like “LEGO building blocks”)
Ring2Ring2Ring1Ring1
RingRing
A
Ring2Ring2Ring1Ring1
SubSub--RingRing RingRing
SubSub--Ring1Ring1 SubSub--Ring2Ring2 SubSub--RingRingNetworkNetwork
(e.g., MPLS, MPLS(e.g., MPLS, MPLS--TP, VPLS, PBBTP, VPLS, PBB--TE, TE, xSTPxSTP, etc.), etc.)
E
C
F
D
B
Service Service Provider Provider
Network XNetwork X
Service Service Provider Provider
Network YNetwork Y
G
SubSub--RingRing
NOTENOTE: : The sub-ring in this case must be configured with the R-APS virtual channel.
NOTENOTE: Network loop freeness of active forwarding path is maintained (during normal state and during all protection switching events) for all interconnection scenarios.
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G.8032 Network ApplicationsG.8032 (with ring interconnection capabilities) can provide resilient (sub-50ms) service restoration for various network applications
Site-to-site Layer 2 VPNsEthernet Private LineWholesale Ethernet access3G/4G cell site Mobile BackhaulEthernet access to IP servicesDelivery of Private Cloud servicesResidential services
MetroMetroTransportTransport
G.8032(Access)
G.8032(Access)
G.8032(Metro /
Aggregation)
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G.8032 Introduction of New Node
AA BBG.803G.80322
EE
CC DD
AA BBG.803G.80322
EE
CC DD
AA BBG.803G.80322
EE
CC DD
AA BBG.803G.80322
EE
CC DD
FF
AA BBG.803G.80322
EE
CC DD
FF
AA BBG.803G.80322
EE
CC DD
FF
1) FS applied at node A and E 2) Fiber providing connection between nodes A & E disconnected
3) New node (F) inserted4) Fiber connected between A-F and E-F
5) FS cleared at nodes A and E6) G.8032 ring reverts back to
normal
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G.8032 End-to-end ResiliencyG.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 provideResilient 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
AA
AA
12
SummarySupplement 52 to ITU-T G-series Recommendations provides supplemental information to Recommendation ITU-T G.8032/Y.1344 (Ethernet ring protection switching)
Ethernet services supportRing interconnectionsNetwork applicationsGuidelines for configuration and management proceduresMultiple Ethernet ring protection instances protection switchingEnd-to-end network/service resiliency involving G.8032
Approved September 2012
Geneva, Switzerland, 13 July 2013
