packet optical transport (pot) · 2/3/2009 · 5 © 2009 adva optical networking. all rights...

Packet Optical Transport (POT)

Fred Ellefson, 2/3/2009

© 2009 ADVA Optical Networking. All rights reserved. ADVA confidential. 2

Trends and challenges Bandwidth growths and cost reduction

  Annual Internet traffic growth rates: ~ 50-60% US, world

 OPEX/CAPEX reduction  Cost per bit transport (optical): ~ 20% reduction per year

Continuous scaling and cost reduction:   40G/100G, highly tolerant, ROADMs, …   Reach extension (single, multi-span), eliminate need for offices, …   Ease-of-use, …

Video enabled

Ban

dwid

th

(multiple web services, millions of users)

Example: Facebook 73 million active users 1+ million new users/week #1 photo site on Internet 20,000 application

Source: University of Michigan, end of 2007


Network/Ethernet evolution

Best Effort Ethernet

Carrier Ethernet

Ethernet over any media

 Ethernet as a service

 Ubiquity, OAM & SLAs key challenges

 EoSONET, EoTDM, EoDSL, etc

Any media over Ethernet

 Fiber dominant in core, regional & campus

 Transport requirements added to Ethernet

 Frame relay, ATM, private line carried over Ethernet

Ethernet as Transport

Early adopters

Mass market

Total domination


Ethernet & transport evolution

Ethernet evolves to replace SONET

Optical layer

SONET Layer

Ethernet Layer

IP Layer

Optical layer

Ethernet Layer

IP Layer

Transport requirement

Ethernet as service

Ethernet as Transport

Operations, admin. & maintenance (OAM)

IP Ping, echo, traceroute

full set including SLA monitoring (802.1ag, Y.1731, RFC-2544)

Protection switching LAG/STP 50msec (G.8031)

Synchronization No Synchronous Ethernet (G.8261/2/4)

Services supported IP/Ethernet IP/Ethernet + T1, T3, FR, ATM, etc (PWE3)

Access topologies Point to point 1+1, tree, ring (G.8031 & G.8032)

Traffic engineering Switched mesh Provisioned (PBB-TE, MPLS-TP)

Control Plane None GMPLS for Ethernet Label Switching (GELs)



  Packet Optical Transport is the combination of wavelength and EVC (VLAN) level switching   Provides high order and low order switching similar to SONET

  Optimizes fill within transport network

  Enables separating users/applications in either the optical or EVC (VLAN) domain

  Reduces O-E-O conversions to reduce capital and energy costs

+ = ROADM

WDM transport Layer 2 switch Packet Optical

Transport (POT)


Layered traffic management

VT1.5

STS-1

Legacy TDM (SONET/SDH)

NGN transition

Low order

High order

EVC/VLAN

Wavelength


ROADM

L2 card

Highly efficient Carrier Ethernet transport

POT


More granularity

Duct Cable Fiber Wavelength Pipe Subpipe


Pipe vs. sub-pipe aggregation

(Full) pipe aggregation

10 * GE port into 10G uplink

Sub-pipe aggregation

20 * GE port (partly filled) into 10GE uplink

1 2 4 3 5 6

7 8 9 10

12

1 2 3 4 5 6 7

8 9 10 11 13 14

15 16 17 18 19 20

1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

“only” aggregation

to be used with filled pipes

aggregation + consolidation

to be used with just partially filled pipes


EVC/VLAN switching

:

GbE links 10GbE links

L2 C

ard

1 2

20

1

2

1 GbE 10GbE

L2 C

ard

1 2

20

1

2

1 GbE 10GbE

:

L2 Card

10GbE 10GbE

1 1

2 2

EVC/VLAN cross-connection

Wavelength and VLAN switching simplifies nodal design


Today

End users eg RESNET, researchers, labs, classrooms etc

Campus network

Aggregation layer eg Regional Optical Network (RON)

R&E backbone eg Internet2

GE pipes only


POT solution

“VLAN/EVC Cross-Connect”

10GE pipes

End users eg RESNET, researchers, labs, classrooms etc

Campus network

Aggregation layer eg Regional Optical Network (RON)

R&E backbone eg Internet2

“VLAN/EVC Mux”

“VLAN/EVC Cross-Connect”


End-to-end protected services

 Reconfigurable optical core network  CIR trails set up through network  Protection managed by edge device  Performance monitoring & OAM functions

provided by edge device

S-VLAN 1

S-VLAN 2 (protection)

CORE ITU-T G.8031 or LAG


Business case (Why)

  EVC/VLAN based networking / aggregation & transport is more efficient than full pipe / circuit based transport

  Less overhead, less unused capacity even overbooking possible

  Lower cost than SONET/SDH

  More flexible than pipe or wavelength based connectivity

  …


Logical connection

OADM ring plus Ethernet switching

L2 switch

L2 switch

L2 switch

L2 switch

Eth Aggr. 2

Cost analysis components: 10 Gbit/s transponder

Cost analysis components: L2 switch

Cost analysis components: 10 Gbit/s IF module,

transceiver

DSLAM

Eth

Aggr. 1


Logical connection

OADM ring with integrated L2 card (POT)

L2 card

1 ..... 20

Cost analysis components: L2 card

Cost analysis components: 10 Gbit/s XFP

FRN Eth Aggr. 2


External L2 switch vs. L2 card

0,00% 10,00% 20,00% 30,00% 40,00% 50,00% 60,00% 70,00% 80,00% 90,00%

100,00%

external L2 switch integrated L2 card (POT)

Transponder Transceiver 10G IF module L2 switch


CAPEX / OPEX analysis

  WDM with integrated Ethernet aggregation saves   Network elements (= number of boxes)   Interfaces   Power consumption   Space consumption

  … and reduces   NMS effort   OPEX

  … and increases   MTBF   Network availability/reliability


POT deployment drivers

Source: Infonetics, 2008

%


POT market forecast

Source: Heavy Reading, Packet-Enabled Optical Networking Quarterly Market Tracker, June 2008

$M


Summary

 Marriage of optics and Ethernet (VLANs) is synergistic – provides layered management

  POT offers savings in OPEX and CAPEX while increasing reliability

  POT will be a key technology for future R&E network designs

Thank you

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packet optical transport (pot) · 2/3/2009 · 5 © 2009 adva optical networking. all rights...

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