Fast failure protection using redundant network edge ports
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United States of America Patent
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Jul 12, 2005
Grant Date -
Nov 6, 2003
app pub date -
Jan 7, 2002
filing date -
Jan 7, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method for fast protection in a fault-tolerant network includes coupling an edge switch in a network to one or more access switches via at least first and second redundant links, respectively connected to first and second ports of the edge switch. The first port is placed in an active state, while the second port is placed in a blocking state, so that communication traffic is conveyed over the first link, and each of the switches builds a respective database for use in forwarding the traffic. Responsive to a failure associated with the first link, the second port is placed in the active state and the first port is placed in the blocking state. Dummy traffic is then sent from the edge switch over the second link to the one or more access switches, so as to cause each of the one or more access switches to modify its respective database responsive to the second port being in the active state.
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