Wallpaper

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Ethernet Services over Packet Aware Transport
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Benefits of Packet-Aware Transport

• History and Goals of Packet Aware Transport
• Benefits of Packet Aware Transport
• Evolution of SONET/SDH Equipment
• Evolution of Ethernet Equipment
• Service Interworking with MPLS

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Ethernet Services over Packet Aware Transport

• History of Packet Aware Transport
• Late 1990s Proprietary Ethernet over Sonet/SDH
  gear
• 2001-present Standards-based data-aware
  Sonet/SDH solutions (GFP, VCAT, LCAS)
• 2002-present Metro Ethernet solutions based on
  pure Ethernet, WDM MPLS as pure-packet
  alternative to Sonet/SDH
• 2005 End-to-end architectures evolve beyond
  point solutions
• Goals for Packet Aware Transport
• Reduce capex for packet services transport
• Support legacy traffic services consistent with
  existing infrastructure
• Reduce opex through functional integration of
  packet transport
• Increase service provisioning times
• Improve bandwidth efficiency associated with
  multiple grades of packet services transport

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Benefits of Packet-Aware Transport
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Packet-Aware Transport Model
MPLS Common Core
Frame Relay
MPLS Core
ATM
Virtual Circuits
Packet-Aware Transport Network
Optical Core
Ethernet
OCn
OC-n Port
OCn
OCn
SONET/SDH
MetroPacket ADM Ethernet MSPPRouter WDM
Core Router SONET/SDH WDM
Access Ethernet Packet ADM MSPP WDM / PON
Customer CLE
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Benefits of Packet-Aware Transport

• History and Goals of Packet Aware Transport
• Benefits of Packet Aware Transport
• Evolution of SONET/SDH Equipment
• Evolution of Ethernet Equipment
• Service Interworking with MPLS

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TDM Centric vs. Packet Centric
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Enabling Technologies Virtual Concatenation

• Radically improves data/Ethernet transport
  efficiency
• More granular than typical Sonet concatenations
  with full legacy Sonet compatibility
• Dynamically created N x STS1 or N x VT1.5 Sonet
  channels for Ethernet transport (N 1, 2, 3)

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Enabling TechnologiesGeneric Framing Procedure
(GFP)
IP Data Services
StorageServices
FutureServices
LambdaServices
GE, ESCONFC/FICON
GE, Ethernet
RPR
ATM
10GE
PDH
PPP (POS)
WIS
HDLC
Frame GFP
Transparent GFP
Virtual Concatenation Sonet / SDH
OTN
DWDM

• Carriers required new, more broadly applicable
  method of mapping new services to their transport
  networks
• Packet-over-Sonet, native Ethernet, Fiber
  Channel, ESCON Resilient Packet Ring (RPR) all
  map to SDH/Sonet equipment using GFP

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Enabling Technologies Resilient Packet Ring

• 2-fiber ring topology each station performs
  add, drop, copy
• Data rates of 155-Mbit/s to 10-Gbit/s beyond
• Packet-based traffic management for 3 classes of
  service
• Sub-50ms protection for all services
• Bandwidth efficiency
• Efficient statistical multiplexing
• Spatial reuse
• Protection per CIR, and not per channel
• Fairness (weighted)
• Support for both Sonet Ethernet PHY

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SONET Evolves for Packet Efficiencies
STS-1, VT1.5
Packet Services
Packet Fabric
Sonet/SDH PHY
Service Aware ADM

• Distributed DXC
• Mapping of packet services to circuits
• Some local packet switching

• Optimized for packet multiplexing
• Mapping of circuits over packets
• Traditional synchronization

• Add/drop circuits
• No support for packet services

Time
Circuits
Packets
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Benefits of Packet-Aware Transport

• History and Goals of Packet Aware Transport
• Benefits of Packet Aware Transport
• Evolution of SONET/SDH Equipment
• Evolution of Ethernet Equipment
• Service Interworking with MPLS

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Managed Ethernet access

• Positives
• Very low CAPEX
• Inexpensive compact units
• Efficiency through aggregation
• Very low OPEX
• Simple to deploy and operate
• Full OAM
• Connection oriented approach
• Carrier class
• Secure traffic separation
• Scalable
• Future proof

Physical ring or pt-pt mesh options
Core POP Central Exchange Metro Network
Local Exchange Access Network
Dual-homing for higher availability
Customer
Ideal for profitable mainstream rollout
Data services
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Carrier-class Ethernet mixed deployment
P
Metro core
PE
PE
Aggregation 2
Aggregation switching
Metro access
Aggregation
Aggregation
x 10
CP
Demarcation
Demarcation
x 10
x 10
x 10
x 10
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Aggregation network putting it all together
Integrated Ethernet access infrastructure for
enterprise, business and retail market
Network services layer
Service edge switch or router
Metro PoP
Aggregation and demarcation layer
ProtectedGigabit Ethernet ring
10 x 10/100
6 x 10/100/1000
FE
GE
FE
GE
Business / retail
Enterprise / business
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Scalable Ethernet access solutions
Metro Ethernet
Metro core
FSP Management Suite
Ethernet
Ethernet
Metro access
Customer premise
Port aggregation
Port extension
Ethernet backhaul

• Secure connection oriented transport
• Statistical multiplexing
• Flexible bandwidth options from 1 to 1000Mbit/s
• Most cost-effective solution for carrier mass
  rollout

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Extending Ethernet Transport into core transport
Level Of Aggregation

• Rapidly scale and add new Ethernet services over
  existing fiber infrastructure
• Extend distances up to hundreds of kilometers
• Natural extension in to core/access transport

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Benefits of Packet-Aware Transport

• History and Goals of Packet Aware Transport
• Benefits of Packet Aware Transport
• Evolution of SONET/SDH Equipment
• Evolution of Ethernet Equipment
• Service Interworking with MPLS

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MPLS Evolves the Metro
Customer A logical path
The Internet
VLAN/MPLS/IP mapping in metro edge device
Customer B logical path
Internet peering location
Metro core
PoP3
PoP4
PoP1
PoP2
Access infrastructure
FSP 150Mx
FSP 150Mx
FSP 150Mx
x10
x10
x10
x10
FSP 150CP
FSP 150CP
FSP 150CP
FSP 150CP
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MPLS Evolves the Metro and Core

• MPLS-enabled core network brings packet-awareness
• Network services defined at the edge of the MPLS
  core network
• Enhanced Ethernet switching services
• Other IP-enabled services, e.g., IP VPN, DIA,
  VOIP