19991215: Data Interruptions-ADMIN NOTICE NOUS40 KWBC (fwd)


796 
NOUS40 KWBC 151317
FOS/NOAAPORT NOTICE NO. 1576     DECEMBER 15... 1999

ATTENTION    FAMILY OF SERVICES SUBSCRIBERS
              NOAAPORT USERS

THE FOLLOWING NOTICE WAS SENT OUT BY THE NETWORK CONTROL
FACILITY /NCF/


NOUS72 KNCF 141950
ADMNCF
SUBJECT   DATA INTERRUPTIONS DURING AWIPS NCF UPGRADE
ON WEDNESDAY AND THURSDAY... 15-16 DECEMBER... THE AWIPS NCF
WILL BE UNDERGOING SOFTWARE UPGRADES THAT WILL AT TIMES
AFFECT AWIPS SATELLITE BROADCAST NETWORK /SBN/
TRANSMISSIONS AND AWIPS WAN TRAFFIC.  THE GENERAL SCHEDULE
IS AS FOLLOWS

WED 15 DEC  SBN UPLINK PACKAGE WILL BE UPGRADED.  THIS
WILL REQUIRE TWO... SIMULTANEOUS INTERRUPTIONS OF ALL FOUR
SBN CHANNELS.  THE FIRST INTERRUPTION WILL OCCUR WHILE
PLACING THE UPLINK PACKAGE ON A STAGING DATA SERVER AND
THE  SECOND WILL OCCUR WHEN MOVING THE UPLINK PACKAGE
BACK TO THE PRIMARY AND SECONDARY SERVERS.  EACH
INTERRUPTION WILL  BE OF LESS THAN 30 MINUTES DURATION...
AND WILL OCCUR 1 TO 2 HOURS APART.  SATELLITE IMAGERY FOR
THE DOWN PERIODS WILL NOT BE AVAILABLE... HOWEVER... ALL
DATA ON THE NWSTG CHANNEL WILL BE QUEUED FOR
TRANSMISSION WHEN SERVICE IS RESTORED.    NO NWSTG DATA
SHOULD BE LOST.

THU 16 DEC   MESSAGE HANDLING SYSTEM /MHS/ WILL BE UPGRADED.
THE MHS UPGRADE WILL REQUIRE TWO INTERRUPTIONS OF MESSAGE
TRAFFIC ON THE AWIPS WAN.  THESE INTERRUPTIONS WILL OCCUR
AS THE MHS IS MOVED TO AND FROM THE STAGING SERVER.  EACH
INTERRUPTION WILL BE APPROXIMATELY 5 MINUTES IN DURATION
AND WILL OCCUR 4 HOURS APART.  THE AWIPS OPERATIONAL MODE
/AOM/ SITES HAVE BEEN CONFIGURED SUCH THAT THEIR OUTGOING
WAN DATA WILL BE QUEUED AT THE SITES UNTIL MHS IS RESTARTED
AT THE NCF.
.
THE NCEP SDM AND NWS/OSO WILL PROVIDE FINAL AUTHORIZATION
TO PROCEED WITH THE NCF UPGRADE..   PROVIDING THAT NO
SIGNIFICANT WEATHER IS PROJECTED DURING THE PLANNED WORK
PERIODS.

ADDITIONAL MESSAGES WILL BE SENT TO AWIPS FIELD SITES JUST
PRIOR TO THE START OF EACH DAY S ACTIVITY... AND AGAIN UPON
COMPLETION OF EACH DAY S ACTIVITY.
END
NNNN





  

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