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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Jul 20, 2010
Grant Date -
Jan 14, 2010
app pub date -
Sep 7, 2009
filing date -
Aug 29, 2002
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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 method is provided for replacing an active processing engine with a non-hot-standby processing engine. Multiple processing engines within a network routing system are configured. The processing engines include an active processing engine having one or more software contexts, representative of a set of objects implementing a virtual router, for example, and a non-hot-standby processing engine having no pre-created software contexts corresponding to the one or more software contexts. Responsive to determining a fault associated with the active processing engine, the active processing engine is dynamically replaced with the non-hot-standby processing engine by creating replacement software contexts within the non-hot-standby processing engine corresponding to the one or more software contexts.
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