fast shared mesh protection (fast smp) an economical and ...€¦ · on failure multi-failure...

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


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


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


Shared bandwidth, Packet layer $$$

Digital OTN: Shared Mesh Protection (SMP)




Less Cost

Fast Recovery

Optical SONET/SDH: 1+1 Protection

Single failure scenario

Dedicated backup resource


Digital OTN: Software Mesh Restoration

Up to few seconds recovery on failure



Multi-failure backups


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


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


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


Reference Topology

Parameter Value

L3 Core Sites 7

Edge Sites 22

Traffic Volume Y1 2.9T



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


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


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


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


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


[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

http://www.informatik.uni-trier.de/~ley/db/journals/cm/cm50.html#DeoreTAHM12


Thank You

fast shared mesh protection (fast smp) an economical and ...€¦ · on failure multi-failure...

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