Method and apparatus for providing fast spanning tree re-starts
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United States of America Patent
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Oct 5, 2004
Grant Date -
N/A
app pub date -
Mar 31, 1999
filing date -
Mar 31, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and apparatus for rapidly re-starting a spanning tree process at an intermediate device. A spanning tree entity running one or more instances of a spanning tree process or protocol stores a record of spanning tree parameter information and port states in a non-volatile memory. Following a re-start, the spanning tree entity verifies whether the parameter information in the non-volatile memory is still valid. If so, the spanning tree entity adopts the port states and the intermediate device resumes forwarding messages accordingly. If the spanning tree parameter information from the non-volatile memory is no longer valid, the spanning tree entity discards it and proceeds to re-calculate the spanning tree and transition its port states in a conventional manner.
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