Virtual link aggregation of network traffic in an aggregation switch
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United States of America Patent
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May 14, 2013
Grant Date -
Sep 22, 2011
app pub date -
Mar 19, 2010
filing date -
Mar 19, 2010
priority date (Note) -
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Abstract
Access switches in a switching system may use virtual aggregated links. When a link between an aggregation switch and an access switch fails, the link failure may be reflected in the virtual aggregated link and data traffic to another access switch may be switched away from the failed switch. A forwarding table in the access switch stores a number of entries that each define a correspondence between destination addresses and an output identifier for the switch. At least a first output identifier includes an aggregated link that represents a first set of possible output links. At least a second output identifier includes a virtual aggregated link, associated with a second network switch that represents a second set of possible output links. Destination addresses in the forwarding table for the virtual aggregated link correspond to network devices connected to the second network switch.
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