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Geoff Molloy. Communications and Computing Branch Bureau of Meteorology Australia. Background. The idea was partly based on two existing networks: RMDCN. British Telecom (BT) Frame Relay links between Melbourne-Singapore-Jakarta. The RMDCN.

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Geoff molloy

Geoff Molloy

Communications and Computing Branch

Bureau of Meteorology

Australia


Background

Background

  • The idea was partly based on two existing networks:

  • RMDCN.

  • British Telecom (BT) Frame Relay links between Melbourne-Singapore-Jakarta


The rmdcn

The RMDCN

  • Virtual Private Network based on Frame Relay PVCs

    • Guaranteed bandwidth ( CIR )

    • Ability to take advantage of unused network capacity ( EIR )

    • PVC costs are in function of the CIR and the location of the end-points

    • No limit to the number of Sites that can be connected

    • No limit to the number of PVCs that can be established

  • TCP/IP is used as a transport protocol

    • Fully managed Cisco routers

  • Connection via a PTT access line to the in-country POP

  • Backup service ( ISDN, PSTN, dual access line )


Phases

Phases

  • implementation of the Improved MTN project should be a progression. In its first stage (Phase I), there would be a mix of “clouds” and existing point-to-point links.

  • Phase I should therefore evolve quickly towards Phase II in which all the MTN links would be provided via a small number of “clouds” or Managed networks – e.g. frame relay.


Geoff molloy

Tokyo

64

X.25

0.2

New Delhi

Washington

Bangkok

Manila

Fax

Guam

19.2 X.25

56 X.25

9.6 X.25

Honolulu

1.2

64

TCP/IP

2.4 X.25

AFTN+GTS

9.6 X.25

Brunei

Micronesia

AFTN+GTS

9.6 X.25

Bracknell

Kuala Lumpur

2.4 X.25

Pago-Pago

NO

1.2

ASMC

Singapore

NO

FR 64 (CIR:4)

TCP/IP (+ X.25)

Apia

Honiara

Port Moresby

FR 64 (CIR:8)

TCP/IP

Jakarta

Internet

28.8*

RTH

4.8 TCP/IP

Papeete

9.6 TCP/IP

RSMC

Nadi

FR 64 (CIR:8)

TCP/IP (+ X.25)

NMC

RSMC

Darwin

Port Vila

Fax

4.8 X.25

Centre in other region

FR 64 (CIR-16) TCP/IP

Noumea

FR 512

(CIR:128)

MTN circuit

Fax

9.6 X.25

Melbourne

Regional circuit

Internet

256*

NO Not operational

CIR Committed Information Rate (Frame Relay links)

Interregional circuit

Wellington

Additional circuit

Internet

256*

Peak speed through Internet

31.VIII.2000

radio broadcast

Regional Meteorological Telecommunication Network for Region V (South-West Pacific)point-to-point circuits implementation (transmission speed in Kbit/s)


Geoff molloy

Network A

RA VI RMDCN

Network B

MTN PVC through Network

Inter-Regional PVC through Network

Existing point to point links

Existing network

RTH - MTN

Gateway RTH

Figure 6.2.2: The IMTN, Phase I: Example of possible Implementation of the MTN -

New Delhi

Bracknell

Moscow

Prague

Beijing

Tokyo

Sofia

Washington

Offenbach

Cairo

Toulouse

Jeddah

Nairobi

Dakar

Algiers

Melbourne

Buenos Aires

Brasilia

Access line to Network Services

Mixed use of Data Communication Network Services and point-to-point circuits


Geoff molloy

Network D

Network C

RA VI RMDCN

Network B

Network A

New Delhi

Moscow

Beijing

Bracknell

Prague

Jeddah

Tokyo

Sofia

Washington

Offenbach

Cairo

Toulouse

Algiers

Nairobi

Melbourne

Buenos Aires

Brasilia

Dakar

Existing Network Services

Network-to Network Interconnection

New possible Network Services

Access line to Network Services

RTH- MTN

Gateway RTH

Figure 6.2.1: The IMTN, Phase II: Example of possible implementation of the MTN - use of Data Communication Network Services


Why a managed network

Why a managed Network?

  • Potential advantages include:

  • Cost-effectiveness compared to dedicated leased lines. Also economy of scale likely to result in significant discounts.

  • Burst capability – ideal for timely receipt of large volume of data for a short period of the day (eg model data)

  • Ability to increase link capacity easily and quickly – no need to order new line.

  • Ability to add additional links quickly and cheaply.

  • High availability – option to have fully managed service and ISDN backup


Mou key to flexibility

MOU key to flexibility

  • Drafting a Memorandum of Understanding (MoU) among the centres

    • ·Responsibilities of each centre;

    • ·Method of procurement of the service;

    • ·Funding of the various stages;

    • ·On-going coordination and management of the relationship with the supplier;

    • ·Procedure for adding another centre to the cloud, etc.


Geoff molloy

FRAME RELAY SCHEMATIC (INFONET by Telstra)

Dorval, Canada

128K

Washington NWS

USA

256K

Tokyo,

Japan

16K

256K

<-16K/8k->

32K

NESDIS

128K

32K

256K

64K

Bracknell

UK

<-16K/8k->

8K

16K

<-16K/8k->

8K

64K

16K

Pretoria,

South Africa

8K

64K

Brasilia

Brazil

64K

128K

Buenos Aires

Argentina

a plan by Telstra

[ Consolidate Network A with B ]

Melbourne

Australia


Geoff molloy

Hong Kong

Washington

HKT

Frame Relay

NNI

Gateway

FR Port

U.S.A.

FR Port

Australia

FR Port

Japan

INFONET

Frame Relay

KDDI

Frame Relay

NNI

Gateway

Local Line

Tokyo

Melbourne

NNI

Gateway

NNI

Gateway

FR Port

U.K.

CAT

Frame Relay

DACOM

Frame Relay

Bracknell

Bangkok

Seoul

IMTN Network B

a plan by KDDI

[ Consolidate Network B with Region II Links ]


Melbourne tokyo washington bracknell network

Melbourne – Tokyo – Washington – Bracknell network

  • Quotes were sought from leading providers for this network – Worldcomm, Sprint, BT. Also a quote was sought from Equant under the RMDCN contract.

  •  At this time (September 2002) at appears that this network will be a service from BT for 3 years

  • Unsymetric PVCs


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