Packet Optical Networking: Optical Networking for Ethernet · VLAN tags and PBB-TE are the simplest...

Copyright Fujitsu Network Communications - 2008

Packet Optical Networking: Optical Networking for Ethernet

Internet 2 Member Meeting October, 2008

Copyright Fujitsu Network Communications - 2008 2

  Connection-oriented Ethernet   Higher quality of Ethernet private line services vs. “carrier Ethernet”   More efficient access to IP services   Transport-centric operations with superior traffic mgmt

  Increased density, simplicity, and capacity of Photonic networking   Increased service velocity   Lower capital costs

  Integration of Connection-Oriented Ethernet and Optical networking

Key Technology Developments in Optical Networking

Packet-Optical Networking


  A Connection-oriented Ethernet network   Explicit definition of the path Ethernet takes in the network

•  Disables Ethernet flooding   Reserves resources for each Ethernet virtual connection

(EVC) and for CoS classes within an EVC •  Guaranteed bandwidth or bursty bandwidth

  Per-connection traffic management and traffic engineering

  Ethernet over SONET or Ethernet over DWDM is a ‘connection-oriented’ example at Layer 1   SONET pipe or DWDM lambda is reserved through the

network   Highest quality EVC performance and 50ms protection

•  No frame loss. Lowest latency and jitter.   But - provides only port transport

•  no Ethernet aggregation

  Layer 2 Bridged Ethernet is ‘connectionless’ on purpose   Provides aggregation in the network   But EVC performance is lower in quality

•  resources for the EVC are not reserved in the network •  Instead, learning bridges are plug and play

  (>200ms protection switching)

Connection-Oriented Ethernet

WDM Eth

WDM

WDM

Eth

Eth

Eth

Eth

Eth

Eth


Resource reservation and queuing implementation   Per-port queuing

  Statistical latency behavior

  Per connection-queuing   Lowest latency/jitter behavior

Round Robin Queue

Strict Priority Queue ?

? Outgoing Port

EVC4

EVC1

EVC5

EVC6

One Set of Queues per output port

Scheduler

S

Scheduler loses visibility to individual connections

Best Effort Queue

Strict Priority Queue

?

? EVC1

EVC5

EVC6

EVC4

Outgoing port




Round robin Q

S Outgoing Port

Strict Priority Q

Multiple Sets of Queues

Scheduler and Shaper

Scheduler and shaping function maintains visibility of each individual connection


Why Ethernet-only approaches for Connection-Oriented Ethernet?   Fewer layers to manage – Ethernet-only OAM

  No Ethernet to VCCV OAM interworking for Ethernet only applications

  Simple software does not burden the network with routing or bridging complexity

  Higher availability and fault tolerance

  Meets the functional requirements   Ethernet bandwidth management with guaranteed

connection performance   Scaling the tag space   PP and P2MP optimized   Enables 50ms dedicated protection –

•  G.8031 for VLAN tag method •  802.1Qay for PBB-TE method

  Can integrate with existing MPLS backbones

Possible technology choices • VLAN DCS / tag swapping • PBB-TE • T-MPLS • MPLS-TP • PWE3/MPLS


ROADM Technology Evolution

 4x density evolution  Shelves/systems evolve to pluggable

cards  Brings cost-effective ROADM layer to the

aggregation network

 ROADM simplicity must increase  Fewer “moving parts”

  2/3 fewer jumpers   Fewer part numbers   Simplified optical hubbing

 Improved automation   Integrated nodal tests   Intra-system monitoring points   In-situ span measurements

ROADM

Stand-alone ROADM

10x Reduction in Transit Traffic Costs

ROADM

ROADM

ROADM

ROADM GE GE

$1000’s

$100’s

Router

GE GE

Transit Costs

ROADM

Capex Value Opex Value 1

2

3 4

5

6

7

8 9 10

11

1 2 Touchless provisioning

• Site visits at service edge only • Automated SONET & wavelength provisioning

“In initial IPTV trials in one small region, we would have to do 30,000 individual fiber jobs without using ROADMs,” G. Keith Cambron, AT&T labs

Packet Optical Networking Platform


Sub-Lambda Grooming Technology Evolution

Ethernet connections

TDM circuits

Universal Electronic Fabric

Ethernet connections

TDM circuits

Segmented Grooming: ADM on a Card (Pair)

•  Connection-oriented Ethernet grooming

•  SONET/SDH grooming •  Non-blocking across full system

bandwidth •  Large-scale integration drives

cost down – no cost penalty

Cross-shelf Grooming Distributed Fabric

Cross-system Grooming Centralized Universal Fabric

•  Small fabric on each interface card

•  Single technology •  Cost-effective for small

bandwidth at spoke sites •  Requires subtended

grooming systems at hub sites

•  Larger fabric on each interface card

•  Interconnects to other cards

•  Grooms across shelf •  Single technology

• (TDM or packet)

SONET ADM Packet ADM Multi-ADM

Clients Clients


  Packaged for density/ simplicity   2-degree roadm in ¼ shelf   360G of fabric access in same shelf

  Full ROADM performance   24 nodes, 1200 km   40G / 88-channel ready   1-degree to 8-degree configurations

  Full ROADM operations   Power balancing   In-situ loss measurement

Photonic and Electronic Integration

 Full bandwidth sub-lambda grooming   Connection oriented Ethernet

 Positions every chassis for any traffic   0 – 100% SONET   0 – 100% Ethernet

 Non-blocking connectivity   Eliminates sub-tended elements

 Optimized for low-cost   I/O cards provide protocol specifics

Universal Electronic

Switching Fabric

Pluggable ROADM

East Amp

WSS

Amp

WSS

West

Any Traffic Any Bandwidth


Integrated Lambda Transport and sub-Lambda Service

λ1

CE

ROADM

VLAN DCS

Shared wave

Dedicated wave

λ1

VLAN service

λ1

Two platforms to decouple Lambda Transport and VLAN service

Integrated platform •  Lambda Transport •  Connection-oriented VLAN services •  Bandwidth virtualization for

connection-oriented Ethernet directly in the optical transport platform

λ2

Packet ONP

Shared wave

λ1 λ1

λ2

CE

VLAN service

Dedicated wave


Optical Networking for Ethernet

  Connection-oriented Ethernet   Service-assured Ethernet transport and aggregation   50ms dedicated protection switching   VLAN tags and PBB-TE are the simplest approaches   Per connection queuing is essential to guarantee latency and jitter

performance

  Combined with pluggable ROADM   Single Packet Optical Networking Platform   Merges wavelength transport and Ethernet VLAN service establishment   Single platform for bandwidth virtualization


Fujitsu … The Possibilities Are Infinite

Packet Optical Networking: Optical Networking for Ethernet · VLAN tags and PBB-TE are the simplest...

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