Technique for protecting a point-to-multipoint primary tree in a connected mode communications network
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United States of America Patent
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Nov 17, 2015
Grant Date -
Mar 24, 2011
app pub date -
May 12, 2009
filing date -
May 23, 2008
priority date (Note) -
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Abstract
The invention relates to a technique for protecting a point-to-multipoint primary tree in a connected mode communications network set up from a primary root node to leaf nodes in the event of a fault affecting the primary root node by means of a back-up tree between a back-up root node and at least one merge node, said at least one merge node belonging to a branch of the primary tree coming from the primary root node. A merge node executes the following steps:
- a step of receiving a request to set up the back-up tree sent by the back-up root node including an identifier of the protected primary root node; anda step of configuring a routing rule in a table, the aim of said rule being to route packets coming from the back-up tree to branches of the primary tree coming from said merge node, said routing rule being activated only in the event of a fault affecting the primary root node.
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