Transcript WINMAN - TERENA

A management architecture for IP over WDM
integration
Dr. Fotis Karayannis1, Mr. Lampros Raptis2, Dr. Joan Serrat3, Mr.
Giorgos Chatzilias2, Mr. Dimitris Chronis4
1
OTE Consulting S.A., [email protected]
2
National Technical University of Athens, {lraptis,
gchatzi}@telecom.ntua.gr
3
Universitat Politècnica de Catalunya, [email protected]
4
Hellenic Telecommunications Organisation SA, [email protected]
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Rationale
• Convergence of voice, data and multimedia services over
a unique IP-based network
• Requirements of bandwidth and QoS for differentiated
services
• Requirements of easy service deployment tailored to user
needs monitored by SLAs
• Advantages of the IP transport service but at the same
time its intrinsic limitations to provide QoS
• MPLS framework supports TE, QoS and VPNs
• Huge amount of bandwidth availability and maturity of the
WDM technology
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Rationale
• Need of end-to-end connectivity
– Easy setup and maintenance
– With required bandwidth and QoS
•The combination of IP and WDM without intermediate layers
(ATM, SDH) seems promising, but
–Completely different technologies and solutions adopted up to now
•In the IP domain: the control plane approach using signaling
•In the WDM domain the mgmt plane approach using MFs
• NOTE: Domain refers only to technology
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Current Trends
• IETF- MPλS
– Extends MPLS framework in the optical domain
– Synergy with appropriate routing protocols (IS-IS, OSPF extensions)
• OIF – Optical Internetworking Forum www.oiforum.org
• ODSI- Optical Domain Service Interconnect www.odsicoalition.com
– Define ATM-like UNI signaling for IP(ATM/SDH)-WDM and NNI for
WDM-WDM (ONE or Optical Sub-network) interaction
• ITU-T – G. ASON (Automatically Switched Optical
Networks, G. ASTN (Automatically Switched Transport
Network
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Current Trends - Problems
• Technical Issues
– Standards not yet mature/Early implementation from different
vendors – Interoperability issues
• Business Model
– Incumbent Operators want to make use of their investments in
intermediate layer legacy networks (ATM/SDH), which don’t fit in
this view
– Competitive ISP could deploy such an automatic switched IP over
optical network
• Still they prefer cost-effective leasing lambdas solution
• Dark fiber/ Condominium fiber-lambdas not yet the case
• Cisco Suspends the ONS 15900 Series Wavelength
Router Product (WaRP)
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WINMAN
WDM and IP Network MANagement
Project IST-1999-13305
New approach: Integrate the IP, the WDM (and
other existing domains) under a common
interdomain mgmt system to provide end-to-end
transport services through the use of MPLS
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WINMAN - Pros
• Technical Issues
– Under-development standards (TMF)
• Business Model
– The solution is extensible to a multi-vendor /multitechnology environment including ATM/SDH
– Competitive ISP could deploy it easily
• Even if leasing lambdas, but with access to the management
system
– Vendors push to have first single domain and interdomain management systems than control-plane
signaling protocols for ASON networks
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WINMAN Goals
• Integrated Network Management solution, capable of
managing end-to-end IP connectivity derived from Service
Level Agreements
• Dissemination of the WINMAN results to the international
telecommunications society
• Exploitation of the results in product and service
development
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Project Info
•
•
•
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Start date:
Duration:
Resources:
Partners
July 1, 2000
33 months
842 Person Months
– Operators:
Telefonica I+D (Spain) , Portugal Telecom (Portugal), OTE,
OTE Consulting (Greece)
– Universities: UCL (UK), NTUA (Greece), UPC (Spain)
– Industry:
Lucent Technologies (Netherlands), TTI-Telecom (Israel),
Ellemedia (Greece)
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Target Architecture
• Single point of access for all management
functions/technology domains
– Easy to add new services
Order Mgt
Trouble Mgt
Billing Mgt
Customer Service
Process
Management
INTER-DOMAIN MANAGEMENT SYSTEM
(INMS)
NMS
(Technology A)
IP
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NMS
(Technology B)
ATM
NMS
(Technology C)
SDH
NMS
(Technology D)
WDM
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Network
Management
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Drawbacks of lack of an INMS
• Management functions must access NMSs per domain:
– Complex
– Inefficient (network resource usage and processing)
Order Mgt
NMS
(Technology A)
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Trouble Mgt
Billing Mgt
NMS
(Technology B)
NMS
(Technology C)
Customer Service
Process
Management
NMS
(Technology D)
Network
Management
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The scope of WINMAN
• Development of the INMS and IP, WDM NMSs as well
– Single Connection Model (technology neutral)
– Uniform QoS perception
– Uniform Fault and Performance representation
• Makes use of existing Standards
– ITU-T’s G.805, G.852 connection models
– TMF´s Telecommunication Operations Map
– TMF’s MultiTechnology Network Management (MTNM) 2.0 and
CASMIM (Connection and Service Management Information
Model) Interface
– IETF´s MPLS for the IP network
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Business/Functional Model
Service Management Actors
Service
Management
Layer
Northbound
Reference
Point
WINMAN
Solution
Inter Domain
Functional System
Network
Management
Layer
WINMAN Operator
WINMAN Workstation
Reference Point
IP Network
Management
Functional
System
ATM Network
Management
Functional
System
SDH Network
Management
Functional
System
WDM Network
Management
Functional
System
Southbound
Reference
Points
Element
Management
Layer
IP Element
Management Actor
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ATM Element
SDH Element
Management Actor Management Actor
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WDM Element
Management Actor
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Physical Model
Service Management
Service
Management
Level
Customer
Service
Manager
Service Management
Layer
Trouble
Billing
Manager
Manager
Order
Manager
Network
Management
Level
Service
Level
Reporter
Published CORBA API
Inter-Domain
Performance Manager
PM data
DB
Perfroma
nce
Manager
Network
Operator
GUI
Inter-Domain
Fault Manager
Inter-Domain
Configuration Manager
Implementa
tion
Manager
Design
DB
End-to-End
Design
Manager
Fault
Correlation
Manager
Fault
Topology
DB
Published CORBA API
Physical
Inventory
Manager
Domain
Manager
NMS
Domain
Manager
NMS
Domain
Manager
NMS
Domain
Manager
NMS
Inventory
DB
Network
Element
Management
Level
IP
EMS
ATM
EMS
Systems will
not be
implemented
SDH
EMS
WDM
EMS
Network
Element
Level
IP
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ATM
SDH
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WDM
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Technical Approach
• Definition of InterDomain Network Management
architecture
– Consider connectivity services based on IP/MPLS
• Network Management systems implementation
– InterDomain Network Management System
– WDM Network Management System
– IP Network Management System
• Experimental verification:
– Management of multiple testbeds
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Main Characteristics
• Multivendor, multidomain management
• Focus on IP over WDM
• Open management architecture
• Policy-based driven management
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Mgmt Functions/Applications
• Configuration Management
– Establish end-to-end connectivity services
– Present end-to-end view of the services
– Autodiscovery of network elements
•Fault Management
–Receive alarms from domain network managers
–Isolate and localize faults
•Performance Management
–Monitor Quality of Transport entities
–Identify network congestion and hotspots
•Interaction between these applications for Survivability
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Design/Implementation Method
• Unified Modeling Language (UML)
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Requirements
Use Cases (on Summary/User/Atomic level)
Scenarios (sunny weather & error handling)
Message Sequences (data flow)
Architecture (building blocks and interfaces identification)
Specification (interface descriptions)
• Tools
– Rational Rose
• Distributed Component Model
– CORBA Component Model
– EJB Component Model
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Domain Model Views
Client Layer
MPLS
MPLS CTP
MPLS CTP
MPLS CS
MPLS TTP
MPLS
MPLS
MPLS Link Connection
SubNetwork-1a
SubNetwork-1b
MPLS
MPLS
MPLS CTP
MPLS
CTP
CTP
CTP
MPLS-SNC
MPLS-SNC
MPLS
PTP
MPLS TTP
MPLS Trail / LSP
MPLS
Topological
Link
Optical TTP
MPLS
MPLS
SubNetwork-2a
SubNetwork-2b
MPLS CTP
MPLS
IP -SNC
MPLS-SNC
IP -SNC
MPLS-SNC
CTP
MPLS
MPLS
Topological PTP
Link
Optical TTP
Och Trail
Optical CTP
Optical
Optical
SubNetwork-1b
SubNetwork-1a
Optical CTP
CTP/TTP
PTP
Topological Link
Trail
Sub-network Connection
Link Connection
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WDM
-SNC
OCh-SNC
WDM
-SNC
OCh-SNC
Optical CTP
Optical Optical
Topological
PTP
Link
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Server Layer
WDM
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Conclusions
• Challenging approach for IP/WDM integration based on
the management plane
• The WINMAN solution is a unified management
architecture for different technological domains
• Short/medium term or long term to coexist with control
based approaches partly depending on the WINMAN
solution evaluation
More details are available at the WINMAN WEB site
http://www.winman.org/
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