Technique for dynamically restoring original TE-LSP attributes for interdomain TE-LSPs
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United States of America Patent
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Feb 24, 2015
Grant Date -
Sep 6, 2007
app pub date -
Mar 3, 2006
filing date -
Mar 3, 2006
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Abstract
A technique dynamically restores original attributes of a Traffic Engineering Label Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.
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