Overview of the Improved MTN project Geoff Molloy Communications and Computing Branch Bureau of...

Overview of the Improved MTN project

Geoff Molloy

Communications and Computing Branch

Bureau of Meteorology

Australia


Background• The idea was partly based on two existing

networks:

1.RMDCN.

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


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• 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.


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

Washington

Honolulu

Tokyo

New Delhi

Papeete

Honiara

Melbourne

Wellington

Port Vila

Noumea

Jakarta

Kuala Lumpur

ASMCSingapore

Bangkok Manila

Brunei

RTH

NMC

Centre in other region

MTN circuit

Regional circuit

Interregional circuit

Port Moresby

radio broadcast

Fax

Fax

64TCP/IP

NO

0.2

2.4 X.25

FR 64 (CIR:4) TCP/IP (+ X.25)

9.6 X.25

FR 64 (CIR:8) TCP/IP (+

X.25)

4.8 TCP/IP

4.8 X.25

9.6 TCP/IP

9.6 X.25

64X.25

1.2

19.2 X.25

RSMCDarwin

2.4 X.25

1.2

FR 64 (CIR-16) TCP/IP

Bracknell

NO Not operational

CIR Committed Information Rate (Frame Relay links)

FR 64 (CIR:8) TCP/IP

NO

Internet256*

Internet28.8*

Apia

Pago-Pago

Guam

Micronesia AFTN+GTS 9.6 X.25

56 X.25

AFTN+GTS9.6 X.25

31.VIII.2000

Internet256*

Peak speed through Internet

Fax

RSMCNadi

FR 512 (CIR:128)

Additional circuit


Network B

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

Network A

RA VI RMDCN

Tokyo

Melbourne

Washington

Bracknell

Beijing

Buenos Aires Brasilia

Prague

Sofia

Algiers

Jeddah

RTH - MTN

Gateway RTH

Existing network

MTN PVC through Network

Inter-Regional PVC through Network

Existing point to point links

Nairobi

Dakar

OffenbachCairo

Moscow

Toulouse

New Delhi

Access line to Network Services

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


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

Tokyo

Melbourne

Washington

Bracknell

Offenbach

Jeddah

Buenos Aires Brasilia

Toulouse

Prague

New Delhi

Sofia

Algiers

Nairobi

Beijing

Cairo

RTH- MTN

Gateway RTH

Existing Network Services

New possible Network Services Network-to Network Interconnection

Network D

Network A

Network C

RA VI RMDCN

Access line to Network Services

Moscow

Network B

Dakar


Why a managed Network?• Potential advantages include:1. Cost-effectiveness compared to dedicated leased

lines. Also economy of scale likely to result in significant discounts.

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

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

4. Ability to add additional links quickly and cheaply.

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


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.

MelbourneAustralia

FRAME RELAY SCHEMATIC ( INFONET by Telstra)

Dorval, Canada

Washington NWSUSA

Buenos AiresArgentina

BrasiliaBrazil

Pretoria,South Africa

Tokyo,Japan

BracknellUK

256K

128K

256K

256K

128K

128K

64K

64K

64K

32K

32K

<-16K/8k->

8K

8K

<-16K/8k->

<-16K/8k->

64K

16K

16K

16K

8K

NESDIS

FR PortJapan

Local LineTokyoTokyo MelbourneMelbourne

BracknellBracknell

FR PortAustralia

FR PortU.S.A.

KDDIKDDIFrame RelayFrame Relay

NNINNIGatewaGatewa

yy

FR PortU.K.

NNINNIGatewayGateway

DACOMDACOMFrame RelayFrame Relay


HKTHKTFrame RelayFrame Relay

IMTN IMTN Network Network BB

INFONETINFONET

Frame RelayFrame Relay

SeoulSeoul

Hong KongHong Kong


CATCATFrame RelayFrame Relay

BangkokBangkok

WashingtonWashington


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

Overview of the Improved MTN project Geoff Molloy Communications and Computing Branch Bureau of...

Documents

Transcript of Overview of the Improved MTN project Geoff Molloy Communications and Computing Branch Bureau of...