ASON Introduction

7/31/2019 ASON Introduction

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Confidential Information of Huawei.No Spreading without Permission.

ISSUE 1.0

OTA058001 ASON Features and

Application Introduction


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ObjectivesObjectives

Upon completion of this course, you will be able to:

Understand the standards of ASON

Grasp the structure of ASON

Grasp the networking characters of ASON

Grasp the service characters of ASON


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3Internal Use

Chapter1 Background of ASON

Demand

Technology Development

Chapter2 System Structure of ASON

Chapter3 Networking Character of ASON

Chapter4 Service Character of ASON


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VoiceVoice

VoiceVoice

DataData

DataData

Demand of ServiceDemand of Service

Broadband data service and leased line service are increasing rapidly andthe capacity of network is getting larger.

Data service has the paroxysmal attribute.


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Demand Catalyze New Form of ONDemand Catalyze New Form of ON

ASONASONASON

Expansibility of network

Flexible service grooming

Reduction of operation cost

Real-time network management

Rapid service supply

Bursting data service

Increasable service supply

ASON Automatic Switching Optical Network


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7Internal Use


Demand

Technology Development





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MPLS: (Multi-Protocol Label Switch)

At 1996 IETF brought the suggestion of MPLS forward.

MPLS protocol can provide the package flow control function called Traffic

Engineering to the data network.

Technology Development of ASONTechnology Development of ASON


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GMPLS, Generalized Multi-Protocol Label Switching

The GMPLS was brought forward by IETF at 2000.

Compared with MPLS, GMPLS has been improved further:

(1 Generalization of label mapping

(2 Bidirectional transportation

(3 Enhanced signaling ability

(4 Integrated routing ability

Technology Development ofTechnology Development of ASONASON


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ASON Standard BodiesASON Standard Bodies

From top to bottom, focuson network mode andframework, draw upASON/ASTN.

From bottom to top, invent GMPLSprotocol and finished RSVP-TE,CR-LDP,LMP,OSPF-TE,IS-IS

Built the Forum for ITU-T andIETF had finishedUNI1.0,studying UNI2.0,E-NNI

IETF: Internet Engineering Task Force

OIF: Optical Internetworking Forum

ITU: International Telecommunication Union


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ITUITU--T ASON FrameworkT ASON Framework

G.807G.807G.807

G.8080G.8080G.8080

G.7713G.7713G.7713

G.7714G.7714G.7714

G.7715G.7715G.7715

G.7716G.7716G.7716

G.7717G.7717G.7717

G.7712G.7712G.7712

General requirement

Network framework

DCN

G.7713.1G.7713.1G.7713.1 G.7713.2G.7713.2G.7713.2 G.7713.3G.7713.3G.7713.3

Call connectionmanagement

Automatic discovery

G.7714.1G.7714.1G.7714.1

Routing Link management Connection probativecontrol

PNNI GMPLSRSVP-TE

GMPLSCR-LDP

Automatic discovery protocolbase on SDH/OTN


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ITUITU--T ASON RecommendationsT ASON Recommendations

11/200102/2006Architecture for the automatically switched optical networkG.8080

N05/2005Protocol neutral Information Model for ASON ManagementG.7718.1

12/200402/2006Framework for ASON ManagementG.7718

N02/2006Control plane initial establishment, reconfiguration, and

recovery

G.7716

2/20044Q 2006ASON routing architecture and requirements for link stateprotocols

G.7715.1

6/200202/2006Architecture and Requirements for Routing in the AutomaticSwitched Optical Networks

G.7715

4/200302/2006Protocol for automatic discovery in SDH and OTN networksG.7714.1

11/200105/2005Generalized automatic discovery techniquesG.7714

3/200302/2006DCM - CR-LDP ImplementationG.7713.3

3/200302/2006DCM - RSVP-TE ImplementationG.7713.2

3/200302/2006DCM - PNNI ImplementationG.7713.1

12/200105/2005Distributed Call and Connection Management (DCM)G.7713

3/20034Q 2006Architecture and Specification of Data CommunicationsNetwork

G.7712


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Draft-IETF-CCAMP-GMPLS-Architecture

Draft-IETF-CCAMP-GMPLS-Architecture

RFC 3471 (GMPLS)Signaling Functional

Description

RFC 3471 (GMPLS)Signaling Functional

Description

GMPLS Framework

Draft-IETF-CCAMP-LMPDraft-IETF-CCAMP-LMP

Draft-IETF-CCAMP-LMP-WDM

Draft-IETF-CCAMP-LMP-WDM

Draft-IETF-CCAMP-

GMPLS-Routing

Draft-IETF-CCAMP-GMPLS-Routing

Draft-IETF-CCAMP-

OSPF-GMPLS-Extensions

Draft-IETF-CCAMP-

OSPF-GMPLS-Extensions

Draft-IETF-CCAMP-SDH/SONET-Control

Draft-IETF-CCAMP-SDH/SONET-Control

RFC3472 (GMPLS)(CR-LDP) Extensions

RFC3472 (GMPLS)(CR-LDP) Extensions

RFC3473 (GMPLS)(RSVP-TE) Extensions

RFC3473 (GMPLS)

(RSVP-TE) Extensions

Draft-IETF-CCAMP-GMPLS-SONET-SDH

Draft-IETF-CCAMP-

GMPLS-SONET-SDH

Draft-IETF-CCAMP-GMPLS-SONET-SDH-

Extensions

Draft-IETF-CCAMP-

GMPLS-SONET-SDH-Extensions

Signaling

Link management

Routing

SDH/SONET Support

IETF GMPLS FrameworkIETF GMPLS Framework


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OIF2000.155OIF2000.155

OIF2000.125.07OIF2000.125.07

OIF2002.229OIF2002.229

OIF2003.179OIF2003.179 OIF2002.378OIF2002.378

OIF2002.023OIF2002.023 OIF2002.163OIF2002.163

OIF2003.248OIF2003.248

OIF2003.293OIF2003.293

UNI Requirement ENNI Requirement

OIF FrameworkOIF Framework

UNI 1.0

UNI 1.0T2

UNI 2.0

ENNI 1.0 signaling regulation ENNI 1.0 layer routing

Base on OSPFlayer routing

DDRP

Base on ISISlayer routing

Huawei had participated in interconnect test of UNI 1.0 from OIF organization

Huawei is participating in the research for cross-domain multi-layer routing


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ASON System Structure

ASON Protocol Structure




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ASON Logical StructureASON Logical Structure

Control Plane

Transport Plane

OCC: Optical Connect Control OSPF: Open Shortest Path First

Switch: Switching Equipment CSPF: Constrained Shortest Path First

CCI: Connect Control Interface NMI : Network Management Interface

OCC

OCC

OCC OCC

OCC

Switch

Switch Switch

Switch

Switch

Management

Plane

NMI

NMI

CCI

GMPLS

OSPF

CSPF


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ASON Network ApplicationASON Network Application

Centralized ASON

NMS

A

BC

D

E

Distributed ASON

NMS

A

BC

D

E

ASON Software

ASON Software

ASON Software

ASON Software

ASON Software

ASON Software

Rapid Speed Restoration, Low risk

Powerful Network Security Reliable

The Merits of the Distributed ASON:


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CrossCross--ConnectConnect

UnitUnit

LineLine

InterfaceInterface

LineLine

InterfaceInterface

Architecture of ASON NEArchitecture of ASON NE

Management Lin

Transport Link

Management Link

Transport Link

NMS

Communication andCommunication andcontrol unit of NEcontrol unit of NE

Control LinkControl Link

Signaling ProtocolSignaling ProtocolRSVPRSVP--TETE

Routing ProtocolRouting ProtocolOSPFOSPF--TETE

Link Management ProtocolLink Management ProtocolLMPLMP

The NE with ASON function ,which is based on the traditional networkelements, has transplanted the intelligent software module


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HuaWeiHuaWeiss Network Based on ASONNetwork Based on ASON

carry 1 carry 2 carry 3

External DataLink

Internal DataLink

Inside Domain

I-NNI signaling RSVP-TE

I-NNI routing OSPF-TE

UNI

UNI

E-NNI

Domain1Domain2

Between Domains

E-NNI signaling RSVP-TE

E-NNI routing DDRP

Between carries

E-NNI protocol RSVP-TEE-NNI route BGP

E-NNI

UNI signaling RSVP-TE

HuaWeisstrategy


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ASON System Structure

ASON Protocol Structure




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ASON Software StructureASON Software Structure

NMS/Command Line

Transport

planesoftware

Software Operation Platform

IP stackprotocol

SOCKETinterface

ASONsoftware

Configure/alarm interface

Qx/CL1/SNMP


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ASON ProtocolsASON Protocols

GMPLS (Routing, Signaling, Link Management)

OSPF (routing)

Flood and gather topology for calculating service pathFlood and gather topology for calculating service path

RSVP-TE (signaling)

Establish and then maintain the service pathEstablish and then maintain the service path

LMP (link management)

Discover the neighbors and linksDiscover the neighbors and links


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Relationship between ASON ProtocolsRelationship between ASON Protocols

neighbor discovery fault positioning link

source management

Link Management Protocol (LMP)

route distribution collection

and calculation

Routing Protocol (OSPF CSPF)

LSP automatic creation

deletion maintenance

Signaling Protocol (RSVP-TE)Path calculationdemand

Service linkinformation

Control linkinformation

Fault

positioninginformation


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LMPLMP

LMP is a protocol being standardized by the IETF. Its functionality includes:

Link Connectivity Verification:Link Connectivity Verification:

Supports the discovery of topological links between adjacentSupports the discovery of topological links between adjacent OXCsOXCs oror PXCsPXCs

Link Parameter Correlation:Link Parameter Correlation:

Supports the exchange of link parameters between adjacentSupports the exchange of link parameters between adjacent NEsNEs

Control Channel Management:Control Channel Management:

Allows the health of the controlAllows the health of the control channel(schannel(s) between two adjacent) between two adjacent NEsNEs to be monitoredto be monitored

Link Fault Localization:Link Fault Localization:

Allows the localization of faults occurring in topological lAllows the localization of faults occurring in topological links betweeninks between PXCsPXCs


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Control channels betweenControl channels between NEsNEs carrying IP packets can be realized in two ways:carrying IP packets can be realized in two ways:

InIn--fiber Control Channel: D4~D12fiber Control Channel: D4~D12

OutOut--ofof--fiber Control Channel: Dedicated DCNfiber Control Channel: Dedicated DCN

Control Channel Maintenance

LMPLMP

NodeA NodeB

Config

ConfigAck/ConfigNack

Config

Config


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Link connectivity verification

LMPLMP

NodeA NodeBBegin Verify

Begin VerifyAck

Test

TestStatusSuccess/Failure

TestStatusAck

Test

TestStatusSuccess/Failure

TestStatusAck...

End Verify

End VerifyAck

Given that each link supports a packetGiven that each link supports a packet--based communication channel, initial neighborbased communication channel, initial neighbor

discovery is performed through the exchange of LMP messages overdiscovery is performed through the exchange of LMP messages over the channelthe channel


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NodeA NodeB

LinkSummaryLinkSummary

LinkSummary

LinkSummary

LinkSummary/Ack/Nack

Link Property Correlation

LMPLMP

LMPLMP


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LMPLMP

#810.168.168.2#210.168.168.1

#610.168.168.2#110.168.168.1

Far-end

Interface ID

Far-end Node IDLocal Interface IDLocal Node ID

Node A automatic discovery

LMP control channel

Node ANode A

10.168.168.110.168.168.1

Node BNode B

10.168.168.210.168.168.2

#1#1

#2#2 #8#8

#6#6

Data LinkData Link

OSPFOSPF P t lP t l


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OSPFOSPF ProtocolProtocol

Collecting and distributing network link information to generate the route Information of

transport plane and control plane

LSDB

TAs LSA

TBs LSA

TDs LSA

TCs LSA

Router

Router

Router

Router1

2 5

3

TA TB

TC

TD

A

D

C

B1

2 5

3

D

C

B1

2

3

D

C

B1

2

3

A

D

C

B1

2

3

A

D

C

B1

2

3

AA

(1)Network topology (2)LSDB of each equipment (3)Map with metric and direction from LSDB

(4)Each equipment calculates to get a spanning tree by taking itself as the root

RSVPRSVP TETE


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RSVPRSVP--TETE

RSVP is designed to be a protocol to reserve resources along a preexisting path, RSVP-TE isRSVP with traffic engineering extensions:

The usage of the Path andThe usage of the Path and ResvResv messages to demand and assign labels for LSPmessages to demand and assign labels for LSP

establishmentestablishment

The ability to specify an explicit route when establishing or reThe ability to specify an explicit route when establishing or rerouting an LSProuting an LSP

The ability to specify bandwidth and other parameters when estabThe ability to specify bandwidth and other parameters when establishing an LSPlishing an LSP

The ability to associate relatedThe ability to associate related LSPsLSPs

A new Hello protocol for maintaining the adjacency between RSVPA new Hello protocol for maintaining the adjacency between RSVP peerspeers


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RSVPRSVP TETE


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LSP establishing procedure

A B C

PATH mess

PATH mess

RESV mess

RESV mess

PATH mess

PATH mess

ACK mess

ACK mess

ACK mess

ACK mess

ACK mess

ACK mess

Upward-Link

Downward-Link

Opening Alarm Monitoring

RSVPRSVP--TETE

RSVPRSVP TETE


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A B C

PATH mess

PATH mess

PATH ERR mess

PATH ERR mess

ACK mess

ACK mess

ACK mess

ACK mess

LSP deletion

RSVPRSVP--TETE

LSP deletion procedure

Closing Alarm Monitoring

ASONASON ProcedureProcedure


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ASONASON ProcedureProcedure

Resource and Topology Discovery

11 NE boots the NE software first, and then the ASON software.NE boots the NE software first, and then the ASON software.

The ASON software synchronizes the configured informationThe ASON software synchronizes the configured information

22 ASON software generates TE link information and verify the TE liASON software generates TE link information and verify the TE linksnks LMPLMP

33 ASON software gets the Local Interface Message from OSP platformASON software gets the Local Interface Message from OSP platform..

44 Receives the other nodesReceives the other nodes information and generates networkinformation and generates network--wide resourcewide resource

topology maptopology map OSPFOSPF

ASON ProcedureASON Procedure


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Service establishment RSVP TE

11 The source node receives the demand and calculates the best routThe source node receives the demand and calculates the best route basede based

on the network topology.on the network topology.

22 The source node creates the cross connect.The source node creates the cross connect.

33 The source node sends service establishment demand to the mediumThe source node sends service establishment demand to the medium nodesnodes

to complete the procedure by exchanging signaling protocolto complete the procedure by exchanging signaling protocol..

ASON ProcedureASON Procedure

QuestionsQuestions


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QuestionsQuestions

Which three planes does ASON have?

What is the main protocol ASON uses?

Whats the working procedure of ASON NEs?


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Resource Automatic DiscoveryResource Automatic Discovery


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Resource Automatic DiscoveryResource Automatic Discovery

A

B

G

H

I

FC

D

E

T1

T2

T3

T4

200km

1000km

400km

100km

200km

700km

200km

200km

800km

Every node can search the neighbor NE automatically;

Every NE can build the topology by itself.

Topology and Resource Automatic DiscoveryTopology and Resource Automatic Discovery


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Topology and Resource Automatic DiscoveryTopology and Resource Automatic Discovery

NodeID1

NodeID2

NodeID3

NodeID4

NodeID5

NodeID6

Hello message including Node ID

LSA message

Control channel is D4-D12 or out-band DCN

End2End Service ConfigurationEnd2End Service Configuration


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End2End Service ConfigurationEnd2End Service Configuration

A

B

G

H

I

FC

D

E

R1

R2

R3

R4

Select Source & Destination

Confirm bandwidth/class/restriction about service

Set up the connection for service

Steps of Circuit SetupSteps of Circuit Setup


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A

B

N3N1

N2

N4

N5

Selectwhich

circuit

The first node N1 calculate the best circuit by CSPF with theconstraint condition

Get the topology of transport network by LMP and OSPF-TE

A

B

N3N1

N2

N4

N5

A

B

N3N1

N2

N4

N5

Setup LSP by RSVP-TE with the calculated circuit, meanwhiledownload cross-connect configuration data.

Setup

circuit byRSVP- TE

From A to Bsetup VC4 Bi-

directional circuitwith re-routing

restoration

Steps of Circuit SetupSteps of Circuit Setup

Choose the BestChoose the Best RouteRoute


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Choose the BestChoose the Best RouteRoute

A

B

G

H

I

FC

D

E

T1

T2

T3

T4

Find the best route based on some limiting factors

200km4*VC4

available

100km6*VC4

available

200km4*VC4available

700km2*VC4

available

200km4*VC4

available

200km4*VC4

available

800km1*VC4

available

1000km2*VC4

available

400km5*VC4

available


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SLA: Service Level AgreementSLA: Service Level Agreement


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Diamond Level

Gold Level

Sliver Level

Copper Level

Iron Level

gg

Diamond LevelDiamond Level ServiceService


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Permanent 1+1 protection: the service can always be protected within 50 ms

Working path

Protection path

T2000 NMS

Gold LevelGold Level ServiceService


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VR: the best balance between Bandwidth-Use-Factor and Protection-Time

VR 1

VR 2

The first failure inside one VR results in automatic protection within 50 msThe next failures inside the same VR result in rerouting within several hundred millisecondsGold Service can use unprotected links when there is no available M:N resource.

Silver Level ServiceSilver Level Service


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Provide real time rerouting protection

Copper LevelCopper Level ServiceService


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Fiber BrokenFiber Broken

Circuit BrokenCircuit Broken

Provide no protection service

Iron Level ServiceIron Level Service


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Iron Service

Lost

Iron Service Restored

Gold

Iron

SLASLA


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Temporary service

Low

Very High

No protection/

No restoration

Copper

Temporary service

Very Low

Very High

Service is broken ifit is occupied byhigh level service

Virtual

Can beoccupied

Iron

Real-time restorationof service, no need ofstandby resource

Performs protectionmost of the time, ifprotection is invalid,restoration works

Provide permanentprotection for servicewhen networkresource is utilizable

Description

ServiceApplication

Cost

Bandwidth

Utilization

Index

ProtectionScheme

Protection &Restoration

ServiceLevel

ReroutingVirtual RingSNCP

MediumHighVery High

IP dataservice/Internet

PSTN/GSMBank/negotiablesecurities/Leased line

HighMediumLow

Restoration time


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Routing policy: Hops, Fibers distance, Traffic balance and SRLG (Shared Risk

Link Group)

Different policy will result in different service path

10G Link

1000km8 VC4

1000km8 VC4

1000km64 VC4

1000kmAvailable 64 VC4

500km32 VC4

1500km4 VC4

1500km8 VC4

2.5G Link

1000km8 VC4

Minimum ofHopsShortestdistance

Trafficbanlance

T2000

Optimize the Service PathOptimize the Service Path


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Optimizing the service path is very useful when you adjust or extend networks.

Optimize thispath

T2000

PathPath CorrelationCorrelation


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Ensure the generation of 1+1 services after previous correlative services disabled, and

the main and backup route are supposed to be totally different from each other

Enable the End2End service configuration could be completed through In NE and Non-In

NE in the same NMS

In NE Non-In NE

ServiceService TunnelTunnel


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Carry VC12 service over VC4 Tunnel

Reroute VC4 Tunnel and hence VC12 is restored.

T2000

VC4 Tunnel

VC12 Service

Merge VC12


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CoexistenceCoexistence


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One NMS manage both ASON and Traditional networks.

MSPRing, 1:1 can pass through ASON nodes and Traditional nodes at the

same time.

ASON node

Traditional node

TraditionalTraditional MSPRingMSPRingTraditionalTraditional MSPRingMSPRing ASON NetworkASON Network

T2000

1:1

1:1

ApplicationApplication Model IModel I OverlapOverlap


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O-UNI O-UNI O-UNI O-UNI

IP/ATM/TDMtransport plane

ASON transportand control plane

O-NNI

O-NNI

O-NNI

O-NNI

ASON equipments have different transport and control plane with traditional equipments,

which has only transport plane. They two connect with each other through UNI.

Application Model IIApplication Model II PeerPeer


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GCCGCC

GCC

GCC

GCC

GCC

GCCGCC

IP/ATM/TDM ON equipment

CCICCI CCI CCI

CCI CCICCI CCI

GMPLSControl plane

Equipments have uniform GMPLS control plane


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GlossaryGlossary


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ASON/ASTN :Automatic Switching Optical (Transmission) NetworkASON/ASTN :Automatic Switching Optical (Transmission) Network

OCS :Optical Core SwitchingOCS :Optical Core Switching

OSPF :Open Shortest Path FirstOSPF :Open Shortest Path First

ISIS--IS :Intermediate SystemIS :Intermediate System-- Intermediate SystemIntermediate System

CSPF :Constrained Shortest Path FirstCSPF :Constrained Shortest Path First

LMP :Link Management ProtocolLMP :Link Management Protocol

RSVPRSVP--TE :Resource Reserved ProtocolTE :Resource Reserved Protocol--------Traffic EngineeringTraffic Engineering

CRCR--LDP :Constrained RouteLDP :Constrained Route------Label Distribution ProtocolLabel Distribution Protocol

UNI/NNI :UserUNI/NNI :User--Network Interface/NetworkNetwork Interface/Network--Network InterfaceNetwork Interface

BGP :Border Gateway ProtocolBGP :Border Gateway Protocol

DDRP :DomainDDRP :Domain--Domain Route ProtocolDomain Route Protocol

SummarySummary


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SummarySummaryBackground of ASON

System Structure of ASON

Networking Character of ASON

Service Character of ASON


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Confidential Information of Huawei. No Spreading without Permission.

Documents

ASON Introduction