Transcript Status of Implementation TCP/IP at RTH Beijing NMIC, CMA New upgrade • Link to Pyongyang – ASYNC, 75 Baud -> IP, 64kbps • Link to.

Status of Implementation
TCP/IP at RTH Beijing
NMIC, CMA
New upgrade
• Link to Pyongyang
– ASYNC, 75 Baud -> IP, 64kbps
• Link to Bangkok
– X.25, 9.6kbps -> IP, 64kbps
• Links to Offenbach, Tokyo, Moscow, New Delhi
– FR -> MPLS
– 256kbps -> 2Mbps
New connection
• RTH Beijing - EUMETSAT
– Established over MPLS VPN in July, 2007
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
2
TCP/IP implementation status
Link to
Connection
type
Speed
Routing
protocol
Transmission
procedures
Exchanged data
Offenbach
MPLS VPN
(OBS service)
2Mbps
BGP
FTP (put)
GTS messages
BGP
TCP sockets
GTS messages
FTP (put)
Satellite data
FTP (get)
NESDIS ATOVS data (Tokyo->Beijing)
FTP (put)
GTS messages
Tokyo
Moscow
BGP
CMA Satellite data(Beijing->Moscow)
New Delhi
BGP
FTP (put)
GTS messages
EUMETSAT
BGP
FTP (put)
Satellite data
Bangkok
Leased line
64Kbps
BGP
FTP (put)
GTS messages
Seoul
Frame Relay
32/32kbps
BGP
TCP sockets
GTS messages
FTP (put)
Observations
(Beijing->Seoul)
Static
FTP (put)
GTS messages
Static
FTP (put)
GTS messages
Pyongyang
Leased line
Ulan Bator
Leased line
64Kbps
CMA Satellite data (Beijing->UB)
Hanoi
Leased line
(ASYNC)
75Baud
* Hong Kong, Macao connected with Beijing via Guangzhou
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
3
File naming conventions
• WMO file naming conventions
– Messages with AHL
• CCCCNNNNNNNN.a, CCCCNNNNNNNN.b, CCCCNNNNNNNN.f
– Satellite data
• CMA satellite data: pflag=A
• RARS data: pflag=Z
• Other file naming conventions
– NESDIS ATOVS data filename convention
– Filename conventions used for EUMETCast and FENGYUNCast
– CMA filename conventions (for bilateral data exchange)
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
4
Internet connection
• 1Gbps access rate, 130Mbps protocol rate
Two access lines for redundancy
Exchanging the operational data and TIGGE data
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
5
Usage of Internet
Usage
Remarks
GTS main
 Exchanging GTS messages with RTH Melbourne
via ftp
 Collecting GTS messages from NMC Almaty via
Email
GTS backup
 Backup the GTS traffic between RTH Beijing and
RTH Offenbach
Data collection
 Collecting NCEP GFS products from RTH
Washington via ftp
TIGGE project
 Exchanging TIGGE data with ECMWF and NCAR
via LDM
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
6
Future plans
• Establish backup connection to the MTN links through Internet VPN
–
Participating the IPSec-based VPN test organized by ECMWF
• Upgrade the Beijing-Hanoi GTS connection from the current ASYNC circuit to an IP
link
CBS ET-CTS meeting, Toulouse, France, 26-30 May 2008
7