Ota058001 Ason Introduction Issue 1.02

8/12/2019 Ota058001 Ason Introduction Issue 1.02

http://slidepdf.com/reader/full/ota058001-ason-introduction-issue-102 1/48

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

www.huawei.com

Internal

OTA058001 ASON

Introduction

ISSUE 1.02




Upon completion of this course, you will be able

to:

Outline the standards of ASON

Illustrate the structure of ASON

Describe the networking characters of

ASON

Explain the service characters of ASON




Chapter 1 Background of ASON

Chapter 2 System Structure of ASON

Chapter 3 Networking Characters of ASON

Chapter 4 Service Characters of ASON




Challenges Facing Traditional ON

Too many layers for Optical Network Networking expansibility

End to end service configuration and protection

Real-time management function is poor

MADM

DCN

iManager T2100

iManager T2000 iManager T2000

Traditional ON




Demand of Service

Broadband data service and leased line service are increasing

rapidly and the capacity of network is getting larger.

Data service has the paroxysmal attribute.

Voice

Voice

Data

Data


http://slidepdf.com/reader/full/ota058001-ason-introduction-issue-102 7/48HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Demand Catalyzes a New Form of ON

Expansibility of network

Rapid service supply

Real-time network management

ASON

Bursting data service

Reduction of operation cost

Flexible service grooming





1.1 Demand

1.2 Technology Development




Technology Development of ASON

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.

MPLS: Multi-Protocol Label Switch




Technology Development of ASON

Generalized Multi-Protocol Label Switching：

The GMPLS was brought forward by IETF at 2000.

Compared with MPLS, GMPLS has been improved further:

− Generalization of label mapping

− Bidirectional transportation

− Enhanced signaling ability

− Integrated routing ability

GMPLS





2.1 ASON System Structure

2.2 ASON Protocol Structure




ASON Logical Structure

Control Plane

Transport Plane

OCC

OCC

OCC OCC

OCC

Switch

Switch Switch

Switch

Switch

ManagementPlane

NMI

NMI

CCI

GMPLS

OSPF

CSPF

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




SC: Switched connection is a service connection requested by aterminal user (router, for example) and then created in the ASONcontrol plane through signaling.

PC: Permanent connection is a service connection calculatedbeforehand and then created through the NM by issuing a command toNE.

SPC: Soft permanent connection, the connection between the user and

the transmission network is configured directly by the NM. Theconnection within the transmission network is requested by the NM andthen created by the NE’s control plane through signaling.

ASON Service Type




ASON 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




ASON Logical Structure

Cross-ConnectUnit

LineInterface

LineInterface

Management Link

Transport LinkManagement Link

Transport Link

NMS

Communication andcontrol unit of NE

Control Link

Control Link

Signaling ProtocolRSVP-TE

Routing ProtocolOSPF-TE

Link Management Protocol LMP




Network Based on ASON

Operator 1 Operator 2 Operator 3

External DataLinkInternal DataLink

Inside Domain

I-NNI signaling：RSVP-TE

I-NNI routing： OSPF-TE

UNI

UNI

E-NNI

Domain2

Between Domains

E-NNI signaling：RSVP-TE

E-NNI routing： DDRP

Between carries：

E-NNI protocol：RSVP-TE

E-NNI route： BGP

E-NNI

UNI signaling：RSVP-TE

HuaWei’s

strategy

Domain1





2.1 ASON System Structure

2.2 ASON Protocol Structure




ASON Protocols

GMPLS (Routing, Signaling, Link Management)

OSPF (routing):

Flood and gather topology for calculating service path

RSVP-TE (signaling):

Establish and then maintain the service path

LMP (link management):

Discover the neighbors and links




Questions

Which three planes does ASON have?

What is the main protocol ASON uses?




Resource Automatic Discovery

Each NE can search the neighbor NE automatically

Each NE can build the topology by itself

800km

A

B

G

F

C

D

E

T1

T2

T4

200km

1000km

400km

200km

700km

200km

200km

T5




End to End Service Configuration

A

B

N3

N1

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

N3

N1

N2

N4

N5

A

B

N3

N1

N2

N4

N5

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

Setupcircuit byRSVP- TE

From A to Bsetup VC4 Bi-

directionalcircuit with re-

routingrestoration




SLA: Service Level Agreement

Diamond Level

Gold Level

Silver Level

Copper Level

Iron Level




Protection and Restoration

Protection: Protection switch. Redundancy resource is reserved to

protect the working traffic in very short time when working channels is

failed;

Restoration: Real time reroute. Routing protocol will recalculate the

service path, then signaling protocol re-build the new LSP to restoreservice.




Diamond Level Service

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

T2000 NMS

ASON NE Client

Working Path

Protection Path




Gold Level Service

The first failure inside one VR results in automatic protection within 50 ms

The next failures inside the same VR result in rerouting within several hundred milliseconds

Gold Service can use unprotected links when there is no available M:N resources.

VR 2VR 1

Less

than50ms

T2000 NMS

ASON NE

Client




Silver Level Service

Provide real time rerouting protection

T2000 NMS

ASON NE

Client




Copper Level Service

Provides no service protection

T2000 NMS

ASON NE

Client




Iron Level Service

VR 2VR 1

Less

than50ms

T2000 NMS

ASON Client

Gold Level

Iron Level




Service Tunnel

Carry VC12 service over VC4 Tunnel

Reroute VC4 Tunnel and hence VC12 is restored

VC4 Tunnel VC12 Service

Merge VC12

T2000 NMS

ASON NE

Client




Path Correlation

T2000 NMS

ASON NE

Client

Path

Correlation




Migrate from PC to SPC

Smooth upgrade of the traditional network to ASON

PC SPC Signaling

PC: Permanent Connection SPC: Soft Permanent Connection

T2000 NMS

ASON NE

MSTP NE




Coexistence

One NMS manage both ASON and Traditional networks

MSP Ring,1:1 can pass through ASON nodes and Traditional nodes at the same time

ASON NE

SDH NE

MSPMSP

MESH

T2000 NMS




Application Model : Overlap

ASON equipments have different transport and control plane with traditional

equipments, which has only transport plane. They two connect with each other

through UNI.

IP/ATM/TDM

transport plane

ASON transport

and control plane

O-UNI O-UNI

O-NNI

O-NNI

O-NNI

O-NNI




Application Model : Peer

Equipments have uniform GMPLS control plane

IP/ATM/TDM

GMPLS

Control planeGCC

GCC

GCC

GCC

GCC

GCC

GCCGCC

CCICCI CCI

CCICCI CCI CCI CCI




Spreading

Long-haul/Backbone layer first，making a domain to perform end2end service

configuration, Mesh networking and restoration

Aggregation layer implements ASON and operate with long-haul/backbone layer to

expand the range of end2end service providing

Client layer joins in to provide dynamic bandwidth service

Toll

Client

Aggregation

Long-haul/Backbone




Glossary

ASON/ASTN :Automatic Switching Optical (Transmission) Network

OCS :Optical Core Switching

OSPF :Open Shortest Path First

IS-IS :Intermediate System- Intermediate System

CSPF :Constrained Shortest Path First

LMP :Link Management Protocol

RSVP-TE :Resource Reserved Protocol----Traffic Engineering

CR-LDP :Constrained Route---Label Distribution Protocol

UNI/NNI :User-Network Interface/Network-Network Interface

BGP :Border Gateway Protocol

DDRP :Domain-Domain Route Protocol




Background of ASON

System Structure of ASON

Networking Character of ASON

Service Character of ASON

Summary



www.huawei.com

Thank You

Ota058001 Ason Introduction Issue 1.02

Documents

Transcript of Ota058001 Ason Introduction Issue 1.02