System and method for loop avoidance in multi-protocol label switching
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United States of America Patent
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Apr 12, 2005
Grant Date -
N/A
app pub date -
Jun 7, 2000
filing date -
Jun 7, 1999
priority date (Note) -
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Abstract
A method for avoiding loops from forming when setting up label switched paths is provided. The method uses a Label Splicing Message is followed by an Acknowledgment message to determine if loops are formed in the process of joining a new node or subtree to a multicast MPLS tree. By verifying that the path towards the root of the MPLS tree is loop-free during the construction of the tree, this method complements the loop detection mechanism provided by the label switched protocol (LDP).
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