Post on 27-Dec-2016
© Ciena Confidential and Proprietary
Carrier Ethernet Protection Options
John Hawkins Carrier Ethernet Service Delivery October 2011
2 © Ciena Confidential and Proprietary
Predictable Resilience Options
G.8032 OpEx friendly (E-Line, E-LAN, and E-Tree services) Low CapEx Sub 50ms protection Standardized in ITU-T SG15/Q9 G.8032
PBB-TE
IEEE standard 802.1Qay Sub 50ms protection Traffic engineering, Static Provisioning
MPLS Protection via FRR or BFD mechanisms Dynamic control plane
MPLS-TP
Sub 50ms protection Static provisioning model (or dynamic control plane)
Mesh
Ethernet OAM and Protection Carrier Class QoS
Ethernet Service
Ring
Primary Path
Failover Path
3 © Ciena Confidential and Proprietary
G.8032 Ethernet Rings Major Rings, Sub-Rings & Operator Commands
Ethernet Ring Values • Efficient connectivity (P2P, multipoint, multicast) • Rapid service restoration (<50 msecs) • Technology agnostic (runs over Ethernet, OTN, Sonet etc…) • Fully standardized (in ITU-T SG15/Q9 G.8032) → Feb’08 • Scales to a large number of nodes and high bandwidth links
(GE, 10G, 40G, 100G)
Plus • Services crossing multiple metro rings • Efficient hierarchical aggregation • Multiple metro ring topologies • Single and dual homing configurations • CESD & transport portfolio interoperability • Transport-like operator commands
• Force switch and clear
Standalone rings Single and dual homed ring Ring ladders Sub-ring homing on multiple parent rings
Ring RingID 1
Major Ring RingID 2
Sub-Ring RingID 3
Sub-Ring RingID 5
Sub-Ring RingID 4
4 © Ciena Confidential and Proprietary
R-APS messages
a) Normal configuration b) Ring span failure occurs
c) LOS detected d) Port blocking applied e) APS message issued
f) R-APS causes forwarding database flush g) Ring block removed
A B
C
D E
F
A B
C
D E
F
A B
C
D E
F
A B
C
D E
F
R-APS messages
A
G.8032 Failure/Restoration Walk-thru
2 1
3 4
5 © Ciena Confidential and Proprietary
G.8032 Sub-rings: How it Works A sub-ring is a G.8032 ring that:
• On its own, does NOT form a closed loop.
• Is connected to other G.8032 ring via a pair of interconnection nodes
Traffic between the interconnection nodes is controlled by the major G.8032 ring(s) via an interconnection link.
Sub-Ring’s RPL channel block only block client traffic, not R-APS messages
Sub-Ring’s implicitly block R-APS messages at their interconnection node termination ports.
Data traffic is prevented from ingressing/egressing the port Control traffic (R-APS messages) not forwarded across the node
- R-APS messages are still handed to SW for processing locally
- Local SW generated R-APS messages are still allowed out the port
- A failure of the Interconnection link causes protection switching of the major ring ONLY.
Sub-Ring termination points
A B
C
D E
F J F
E
G H
I
MajorRing
Sub-Ring
Interconnection Link
Major Ring
Sub-Ring
6 © Ciena Confidential and Proprietary
G.8032 Major Ring
G.8032 Dual-homed
Sub-Ring
G.8032 Ethernet Ring Protection with Sub-Rings
Mesh VCs
LER
LER
MTU
PE/LER
MPLS-TP LSR
Operator “Force Switch” Command Operator “Clear ” Command
Services across multiple ring topologies
Sub- ring Protection Switching
Transport Like – “Operator Commands”
7 © Ciena Confidential and Proprietary
Example G.8032 Network Applications Wireless Backhaul
Business Services - Access
Business Services – Private Build
Business Services – DSL Aggregation
CO
Metro Packet Transport
N x T1/E1s
Ethernet
Data
Voice
BSC
RNC
Metro/Collector G.8032
Metro/Collector G.8032
Access G.8032
Metro Packet Transport
Other Core Technology Data
Voice
BSC
RNC
Access G.8032
HQ Metro Packet
Transport
Metro/ Collector G.8032
Metro/ Collector G.8032
Access G.8032
Metro Packet Transport
Other Core Technology
Data
PSTN
HQ
Data
PSTN
PBX Ethernet
T1/E1s
Branch Office #1
PBX
Ethernet
T1/E1s
Branch Office #2
PBX
Ethernet
T1/E1s
Branch Office #3
PBX
Ethernet
T1/E1s
PBX
T1/E1s
Ethernet
Branch Office #1
PBX
Ethernet
T1/E1s
Branch Office #2
Branch Office #3
HQ
Standalone G.8032
Data
PSTN
Ethernet
Standalone G.8032
LAG
Metro Core
Ethernet
Ethernet Ethernet
9 © Ciena Confidential and Proprietary
G.8032 G.8032
Dual-homed
MPLS-TP LSP Protection
PC4 VS MPLS Virtual Switch MPLS to PBB-TE Ethernet to MPLS Ethernet to PBB-TE
Legend
C
PBB-TE
Spoke VC
Spoke VC
VS
VS
VS
PE
LER
LER
PE
MTU
MTU
Deterministic traffic engineering & resilience
End to end protection, facility backup (1:1 and 1:n protection)
OAM toolset for service assurance S V
S V
S V
LSR MPLS-TP VS
EVCPBB-TE Tunnel / Q-in-QMPLS LSPMPLS LSPQ-in-Q & G.8032EVC
10 © Ciena Confidential and Proprietary
Case Study: Mobile Network Operator
N x 10 GE
Core Routed
Network
Metro/Aggregation Access
BS
GE
BS GE
SR
Agg POP
BS
BS
BS BS
BGP VRRP N x10 GE
SR
MSC
Primary Path Backup Path
Real differentiation: Over 16K Carrier Ethernet enabled cell towers (to date) Microwave/mmwave access (95%) with fibre aggregation Carrier grade networking and OAM Automated provisioning
11 © Ciena Confidential and Proprietary
MNO Case Study What was required/deployed?
“This is how networks will be
built” - CTO
Carrier Ethernet Backhaul from cell site to mobile switching center IP/MPLS (with dynamic control plane) deemed too expensive
Radio+Fiber Transport – lowest cost nationwide solution Transports both 3G & 4G Traffic (30-100 Mbps per cell tower today) Robust resiliency and architectural stability
High service availability via tiered resiliency and diverse path tunnels
Fast deployment and time to revenue simple, fast tunnel & service provisioning (avg. turn up time per tower = 5 min)
Network optimization with low latency handovers & restoration Enhanced scalability (1000+ sites per Metro / millions of services) QoS and SLA guarantees (via CIR/EIR per service and per tunnel) Advanced OAM service monitoring
via 802.1ag, Y.1731, per service loop-backs, etc