Multiplex communications – Diagnostic testing – Path check
Reexamination Certificate
2006-04-18
2006-04-18
Pham, Brenda (Department: 2664)
Multiplex communications
Diagnostic testing
Path check
C370S238000
Reexamination Certificate
active
07031262
ABSTRACT:
A mechanism to alleviate bandwidth fragmentation in a network employing path computation element(s) to place MPLS Traffic Engineering tunnels. One application is a multiple Autonomous System or multiple area network employing distributed computation of MPLS Traffic Engineering LSPs. A particular path computation element may determine that bandwidth fragmentation is present based on monitoring of path computation failures where desired paths are blocked due to bandwidth constraints. In response to the detected bandwidth fragmentation condition, the path computation element floods a routing notification within its Autonomous System or area. Nodes respond to the routing notification by requesting reoptimization of their own previously requested Traffic Engineering LSPs allowing the path computation element an opportunity to alleviate bandwidth fragmentation.
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Goguen Robert
Sivabalan Muthurajah
Vasseur Jean Philippe
Ward David
Cisco Technology Inc.
Kaplan Cindy
Pham Brenda
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