Configuration synchronization for redundant processors...

Data processing: software development – installation – and managem – Software upgrading or updating

Reexamination Certificate

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Reexamination Certificate

active

07320127

ABSTRACT:
Methods and devices are provided for maintaining configuration synchronization when an Active unit and a Standby unit have different versions of a software image. Preferred implementations allow the system to operate in a stateful mode even after the Standby unit has had an image upgrade. Other implementations allow the system to operate in a stateful mode when the Active unit has a higher-level version of the image than the Standby unit.

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Alfred v. Aho, Ravi Sethi, Jeffrey D. Ullman: “Compilers: Principles, Techniques, and Tools,”1986, Addison-Wesley Publishing Company, USA, pp. 1-463.
International Search Report and Written Opinion Of The International Searching Authority dated Jun. 7, 2005, for related PCT Application No. PCT/US2004/038361.

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