Determining a congestion metric for a path in a network
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United States of America Patent
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Dec 25, 2012
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app pub date -
Jul 31, 2010
filing date -
Feb 18, 2004
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Abstract
Methods and systems for determining a congestion metric for a path in a network are provided. According to one embodiment, multiple paths are provided between each pair of multi-path load balancing (MPLB) components within a Layer 2 network by establishing overlapping loop-free topologies in which each MPLB component is reachable by any other via each of the overlapping topologies. A first MPLB component associated with a first network device sends a latency request packet, including a first timestamp provided by a first clock associated with the first MPLB component, to a second MPLB component associated with a second network device via the path. Responsive thereto, the first MPLB component receives, from the second MPLB component, a latency response packet, including a second timestamp provided by a second clock associated with the second MPLB component. The first MPLB component derives a one-way latency value for the path based upon the timestamps.
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