imtn and managed data network services technical conference on the wis (seoul, 6-8 november 2006)...
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IMTN and managed data network services
Technical Conference on the WIS (Seoul, 6-8 November 2006)
Hiroyuki ICHIJO (Japan Meteorological Agency
MTN configuration
Melbourne
W ashington
Exeter
N ew Delhi
Beijing
J eddah
N airobiDelhi
Dakar
Algiers
Buenos Aires
Brasilia
Moscow
Cairo Tokyo
SofiaPragueToulouse
Off enbach
Region IIRegion VI
Region I Region V
Region IV
Region III
The Main Telecommunication Network (MTN) interconnects 6 RegionalMeteorological Telecommunication Networks (RMTNs) as a core of the GTS. The MTN consists of 18 MTN Centres and 25 connections.
Strategies to improve the GTS
Strengthen the overall GTS capabilitieswith cost-effectiveness and technical trends
Migration to TCP/IP
Use ofcost-effective
network services Strategies
Leased circuits Legacy protocols Traditional GTS
Improved GTS
• Internet like applications• Saving implementation costs and human resources• allowing latitude in selecting a network service
• Expanding bandwidth• Flexible connectivity• Saving recurrent cost
Layer separation approach to the improved GTS
Message Switching
Message Switching
Server/client Server/client
File transfer File transferApplication layer
Transport layer
Frame Relay
IP-VPN
Transmissionprotocol layer
Use of network services
Migration to TCP/IP
Adding applications
Legacy protocol Legacy protocolTCP/IP TCP/IP
Concepts of IMTN The CBS, at its 1998 extra-ordinary session, stressed that The CBS, at its 1998 extra-ordinary session, stressed that the MTN shall be reviewed fundamentally to meet evolving the MTN shall be reviewed fundamentally to meet evolving data exchange requirements of WMO Programmes other than data exchange requirements of WMO Programmes other than the WWW. The IMTN project has been promoting the reform the WWW. The IMTN project has been promoting the reform of the MTN capability as a genuine network since its of the MTN capability as a genuine network since its commencement in 1999. commencement in 1999. Reform concepts are:Reform concepts are:
(1) to provide capability and flexibility to meet new and future (1) to provide capability and flexibility to meet new and future requirements by using technical innovation;requirements by using technical innovation;
(2) to seek cost-effectiveness with appropriate reliability and (2) to seek cost-effectiveness with appropriate reliability and security;security;
(3) to challenge establishment of a collaborative contractual (3) to challenge establishment of a collaborative contractual framework;framework;
(4) to keep up with an appropriate pace for implementation, (4) to keep up with an appropriate pace for implementation, i.e.i.e.
“ “early implementation leads early benefits.” early implementation leads early benefits.” A point of implementation strategy is the evolutionA point of implementation strategy is the evolution from bilateral physical circuitsfrom bilateral physical circuits to logical connections through seamless network to logical connections through seamless network “cloud”. “cloud”.
Status of the IMTN project
The current IMTN is structured with two “clouds” of Frame Relay network services.• 17 of 25 MTN circuits are in operation on the Clouds.• 12 of 18 MTN centers participate in the Clouds.
Exeter
SofiaMelbourne
Buenos Aires
TokyoBeijing
Nairobi
Washington
Cloud ICloud I
Jeddah
Prague
Toulouse
Dakar Algiers
Offenbach
Brasilia
Cairo
New DelhiMoscow
Cloud IICloud II
Details of Cloud I
1.5Mbps
256kbps
256kbps
Primary PVCBoM Backup PVC
Access circuit 1.5Mbps
256kbps
Exeter
MelbourneDisaster Recovery
Site Brisbane
Tokyo
Washington
768k
32k
32k
16k
64k64k
32k
32k
32k
CIR in each direction [bps]
32k
16k16k
16k16k
16k16k
16k16k 4k4k
4k4k
BT Frame RelayBT Frame Relay
• Logical connections (PVC: Permanent Virtual Circuit) through BT Frame Relay network
• Configuration of asymmetric bandwidths by CIR (Committed Information Rate) for unbalanced traffic conditions
• Arrangement of backup re-routing with a dynamic routing protocol (BGP-4)
Unbalanced traffic and asymmetric CIRs (Cloud I)
1076 Mbytes/day
40% of CIR
25 Mbytes/day
55% of CIR
Each pays forits local access circuit and an incoming CIR
CIR=32kbps
CIR=768kbps
Tokyo Washington
1.5Mbps1.5MbpsFR
Backup Re-routing (Cloud I)
Cloud IWashingto
n
Melbourne
Tokyo
Link Link failurefailureBGP-4
Traffic on normal condition
BGP-4 Bypass trafficfor backup
Details of Cloud II• PVCs through OBS (Orange Business Service, former
EQUANT) Frame Relay network under expansion of the European contract
•Centralized network monitoring by ECMWF & Consumer Premise Equipment (CPE, Cisco Router) managed by OBS
• Configuration of asymmetric bandwidths by CIR
Cloud IICloud II
By OBSBy OBS
Moscow
32k
16k 8k
8k48k 96k
16k 8k
32k48k
384k
64k
16k
16k
8k
8k
New Delhi
Jeddah
64kbps
512kbps
256kbps256kbps128kbps
64kbps1024kbps
2048kbps
512kbps
256kbps
Sofia
Prague
Exeter
ToulouseOffenbach
Tokyo
Beijing
128k
64kCPE
CPECPE
CPE CPE
CPE
CPE
CPECPECPE
Collaborative contract (Cloud II)
Network service provider
(OBS)MasterContract
Customer representativ
e(ECMWF)
Regional network in EuropeRegional network in Europe
(RMDCN in Region VI)(RMDCN in Region VI)
AccessionAgreement
AccessionAgreement
AccessionAgreement
NetworkNetworkmonitoringmonitoring
IMTN Cloud IIIMTN Cloud II
AccessionAgreement
AccessionAgreement
AccessionAgreement
HelpdeskHelpdesk
Contract
Contract
Expansion
Expansion
Benefits of IMTN
The implementation of the IMTN brings The implementation of the IMTN brings various benefitsvarious benefits::
(1) further reliability(1) further reliability stable operation for real-time data exchangestable operation for real-time data exchange
(2) better performance in throughput(2) better performance in throughput exchange of large volume of data such as satellite exchange of large volume of data such as satellite
data/productsdata/products
(3) manageable link parameters(3) manageable link parameters efficient configuration to meet traffic conditionsefficient configuration to meet traffic conditions
(4) flexibility and scalability(4) flexibility and scalability easy compliance with evolving requirementseasy compliance with evolving requirements
(5) cost-effectiveness(5) cost-effectiveness saving recurrent costssaving recurrent costs
Market trends of global managed data network services
• Migration from leased circuit, ATM and Frame Relay services to MPLS/IP-VPN (Multi Protocol Label Switching/IP-Virtual Private Network) is remarkable.
• Layer 2 switching VPN is one of next-generation WAN services but premature in market.
0
20
40
60
80
100
120
140
2003 2004 2005 2006 2007 2008 [year]
[billion US$] Leased circuit ATM/Cell Relay Frame Relay MPLS/IP-VPN Layer 2 VPN
Retail scale of global WAN services
Estimation
Market share of Tier-1 global network operatorsMarket leaders : Equant (OBS at present), AT&T and BT/BT
InfonetTheir strategies: • Extending service coverage by establishing new MPLS
PoPs (Points of Presence)• Bilateral partnerships with national and regional telecom
carriers for MPLS interoperability outside of their footprints
Fast-growth markets : Asia and Eastern Europe
MCI7%
BT/ BT Infonet11%
AT&T12%
Equant (present: OBS)
12%
Cable & Wireless2%
NTT Communications1%
T-Systems2%
Sprint1%
SI/ IT outsourcers37%
Other networkoperators
15%
Global WAN service share (2nd quarter of 2005)
MPLS/IP-VPN
Provider’s PEs and Core Routers based on MPLS have Label Tables and switch IP packets forward according to the Tables.
CE : Customer Edge Router VPN : Virtual Private Network PE : Provider Edge Router MPLS : Multi Protocol Label Switching
Closed
IP networkby a provider
CE PE
CE PE
CE
CE
IP IP Label IP Label
Core Router
Core RouterCore Router
PE
IP
VPN group
VPN group
MPLS/IP-VPN is one of most promising WAN services.
Future of IMTN
For further improvement, For further improvement, migration from Frame Relay to MPLS/IP-VPN is planned. MPLS/IP-VPN service provides:
• flexibility of mesh connectivity among GISCs• additional bandwidth.
Study of possibility ofStudy of possibility ofconsolidation of two Cloudsconsolidation of two Clouds
Frame RelayFrame RelayMPLS/IP-VPNMPLS/IP-VPN
Early2007
Frame RelayFrame RelayMPLS/IP-VPNMPLS/IP-VPN
End of2007
Cloud ICloud I
Cloud IICloud II
CoordinationCoordination
GTSGTS
IMTNIMTN
WIS core network
The IMTN would function as a WIS core network
linking a small number of GISCs together.