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1 | © 2015 Infinera Confidential & Proprietary
Fast Shared Mesh Protection (Fast SMP) An Economical and Fast Protection of
Link/IP Port Failures
Soumya Roy, PhD
Infinera Corporation
Internet2Cleveland, Ohio
2 | © 2015 Infinera Confidential & Proprietary
Network Resiliency
Intelligent sharing of backup resources without losing availability
Fast Recovery2
3 MinimalCosts
Single failure recovery no longer sufficient
Deterministic behavior, within 50 milliseconds
1 Multi-failure backups
3 | © 2015 Infinera Confidential & Proprietary
Recovery Mechanisms for Networks
Shared bandwidth, Transport layer
More Reliable
Sub 50ms recovery on failure
Multi-failure scenarios
MinimalCosts
Packet IP/MPLS: MPLS Fast Re-Route (FRR)
Sub 50ms; higher w/ IP convergence
Multi-failure scenarios
Shared bandwidth, Packet layer $$$
Digital OTN: Shared Mesh Protection (SMP)
Sub 50ms recovery on failure
Multi-failure scenarios
Shared bandwidth, Transport layer
Less Cost
Fast Recovery
Optical SONET/SDH: 1+1 Protection
Single failure scenario
Dedicated backup resource
Sub 50ms recovery on failure
Digital OTN: Software Mesh Restoration
Up to few seconds recovery on failure
Multi-failure scenarios
Shared bandwidth, Transport layer
Multi-failure backups
4 | © 2015 Infinera Confidential & Proprietary
Shared Mesh Protection (SMP) – Sharing
Working Path (High Priority Service)
SMP Path (High Priority Service)
SMP Path (Low Priority Service)
Working Path (Low Priority Service)
1. LINK FAILURE
3. SMP PATH ACTIVATION 2. DATA-PATH
FAILURE NOTIFICATION
Sharing of Bandwidth Among Protection PathsShared Bandwidth used by Low Priority Service
A B
C D
S1
S2
5 | © 2015 Infinera Confidential & Proprietary
Shared Mesh Protection (SMP) – Preemption
Working Path (High Priority Service)
SMP Path (High Priority Service)
4. LINK FAILURE
SMP Path (Low Priority Service)
Working Path (Low Priority Service)
1. LINK FAILURE
Shared Bandwidth used by Low Priority Service
Message #7 is only additional message required for pre-emptionCross-connect over-ride only, no additional time for protection path activation Pre-emption of ‘Extra traffic’ follows same mechanisms
Shared Bandwidth pre-empted by High Priority Service
A B
C D
S1
S2
6 | © 2015 Infinera Confidential & Proprietary
IPoOTN vs. IPoWDM Example
FRR/IGP-R IP port Client Line
A A
B B
C C
IPoWDM: FRR/IGP-R IPoOTN: FSMPA C
10G
Before 2 2 2
After 4 4 4
FSMP IP port Client Line
Before 2 2 2
After 2 2 4
7 | © 2015 Infinera Confidential & Proprietary
Reference Topology
Parameter Value
L3 Core Sites 7
Edge Sites 22
Traffic Volume Y1 2.9T
Traffic Volume Y2 5.3T
Traffic Volume Y3 8.9T
L1 A/D sites 29
Links 33
Topology synthesized to be representative of both US regional & European network
Core sites are population centers in the gravity based model
8 | © 2015 Infinera Confidential & Proprietary
IP Topology
Physical Topology IPoWDM IPoOTN
IP topology optimized for each architecture for a given traffic matrix
• IPoWDM – optimized for link protection
• IPoOTN – optimized for port protection
9 | © 2015 Infinera Confidential & Proprietary
CAPEX – L3 & L1 Bandwidth
IPoOTN reduces network overprovisioning, enables router ports to be more fully utilized
Increased traffic over time reduces the gap for WDM port bandwidth between IPoWDM and IPoOTN
10 | © 2015 Infinera Confidential & Proprietary
OPEX – Space and Power
Metric Core Router Transport
Power 195W/100G 120W/100G
Space Core: 6.4Tb/s of I/O in 42RU/36”, 3.2Tb/s of I/O in
22RU/36” deep chassis
Edge: 1.6Tb/s of I/O in 10RU/31” deep chassis
5 Tbps in 42RU/21’’ deep chassis
11 | © 2015 Infinera Confidential & Proprietary
SMP Provides Better Network Economics
IPoOTN with SMP offers • Deterministic sub-50ms protection• Protection against multiple simultaneous failures• Enables creation of multi-tiered protection service levels• Reduced overall network resources, saving Capex and Opex
12 | © 2015 Infinera Confidential & Proprietary
[1] White Paper ‘MPLS, OTN, and the rising tide of traffic’, Juniper Networks, 2011
[2] S. Melle et al, ‘Comparison of Converged Packet-Optical Core Network Architectures’, 2014 OFC Conference
[3] O. Gerstel et al, ‘Multi-layer capacity planning for IP-optical networks’, IEEE Communications Magazine, January 2014
[4] M. Gunkel, ‘Multi-layer restoration – the impact on the optical layer’, 2014 OFC Conference
[5] S. Roy et al, 2014 OFC Conference, Session Th3B, San Francisco, CA, March 9-13, 2014
[6] A.Deore et al, IEEE Communications Magazine 50(11), pp. 179-187, Nov.2012
[7] A. Balasubramanian et al, ‘Novel IPoOTN Packet-Optical Architecture for Economical and Fast Protection of IP Port/Link Failures’, OFC 2015
References