Fault tolerant routing in a non-hot-standby configuration of a network routing system
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United States of America Patent
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Apr 2, 2013
Grant Date -
Jul 28, 2011
app pub date -
Apr 8, 2011
filing date -
Aug 29, 2002
priority date (Note) -
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Abstract
Methods and systems for facilitating fault tolerance in a non-hot-standby configuration of a network routing system are provided. According to one embodiment, a failover method is provided. One or more processing engines of a network routing system are configured to function as active processing engines, each of which having one or more software contexts. A control blade is configured to monitor the active processing engines. One or more of the processing engines are identified to function as non-hot-standby processing engines, each of which having no pre-created software contexts corresponding to the software contexts of the active processing engines. The control blade monitors the active processing engines. Responsive to detecting a fault associated with an active processing engine the active processing engine is dynamically replaced with a non-hot-standby processing engine by creating one or more replacement software contexts within the non-hot-standby processing engine corresponding to those of the active processing engine.
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