JPS641350A - Gateway backing-up system - Google Patents

Gateway backing-up system

Info

Publication number
JPS641350A
JPS641350A JP62156154A JP15615487A JPS641350A JP S641350 A JPS641350 A JP S641350A JP 62156154 A JP62156154 A JP 62156154A JP 15615487 A JP15615487 A JP 15615487A JP S641350 A JPS641350 A JP S641350A
Authority
JP
Japan
Prior art keywords
machine
standby
currently used
standby machine
priority
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62156154A
Other languages
Japanese (ja)
Other versions
JP2501335B2 (en
JPH011350A (en
Inventor
Fujio Yokoyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62156154A priority Critical patent/JP2501335B2/en
Publication of JPS641350A publication Critical patent/JPS641350A/en
Publication of JPH011350A publication Critical patent/JPH011350A/en
Priority to US07/491,850 priority patent/US5097575A/en
Application granted granted Critical
Publication of JP2501335B2 publication Critical patent/JP2501335B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE: To improve the reliability of a gateway backing-up system, by causing a standby machine to monitor the operation of the currently used machine in such a way that the standby machine sends the testing data of the currently used machine from its own station of one network to its own station of another network through the currently used machine and compares the transmitted data with received data.
CONSTITUTION: A standby machine 4 having higher priority monitors the currently used machine 3 in such a way that the machine 4 sends currently used machine testing data from its own station connected to one network to its own station connected to another network and compares the transmitted data with received data. Another standby machine 4 having lower priority monitors the operation of the standby machine 4 having high priority by monitoring the currently used machine testing data transmitted by the standby machine 4 having higher priority. When the standby machine 4 having lower priority detects abnormality of the standby machine 4 having higher priority, the standby machine 4 having lower priority starts backing-up operations to the standby machine having higher priority following the priority. Therefore, even when the standby machine 4 monitoring the currently used machine 3 becomes faulty, the other standby machine 4 can immediately starts the currently-used machine monitoring operation, and thus, the reliability of the system is improved.
COPYRIGHT: (C)1989,JPO&Japio
JP62156154A 1987-04-17 1987-06-23 Gateway backup method Expired - Lifetime JP2501335B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62156154A JP2501335B2 (en) 1987-06-23 1987-06-23 Gateway backup method
US07/491,850 US5097575A (en) 1987-04-17 1990-03-12 Complex machining machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62156154A JP2501335B2 (en) 1987-06-23 1987-06-23 Gateway backup method

Publications (3)

Publication Number Publication Date
JPS641350A true JPS641350A (en) 1989-01-05
JPH011350A JPH011350A (en) 1989-01-05
JP2501335B2 JP2501335B2 (en) 1996-05-29

Family

ID=15621529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62156154A Expired - Lifetime JP2501335B2 (en) 1987-04-17 1987-06-23 Gateway backup method

Country Status (1)

Country Link
JP (1) JP2501335B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378339A (en) * 1989-08-21 1991-04-03 Nec Corp Duplex control system for inter-local area network bridge device
JPH08256173A (en) * 1995-03-17 1996-10-01 Nec Corp System and device for inter-lan connection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4449903B2 (en) * 2003-06-11 2010-04-14 日本電気株式会社 Router device and network connection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378339A (en) * 1989-08-21 1991-04-03 Nec Corp Duplex control system for inter-local area network bridge device
JPH08256173A (en) * 1995-03-17 1996-10-01 Nec Corp System and device for inter-lan connection

Also Published As

Publication number Publication date
JP2501335B2 (en) 1996-05-29

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