Method and apparatus for performing hitless update of line cards of a network device
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United States of America Patent
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Jan 30, 2018
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app pub date -
Dec 14, 2015
filing date -
Dec 14, 2015
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Abstract
A method in a first network device of performing a software update of a line card of a second network device without disruption to data traffic. The method includes causing a redundant control plane component of the second network device to be updated according to the software update. The method continues with causing the second network device to instantiate, based on the software update, a line card virtual machine (LC VM) as a redundant data plane component for the line card. The method further includes causing a third network device to forward data traffic to both the line card and the LC VM of the second network device, and causing the second network device to update the line card according to the software update while processing the received data traffic using the LC VM.
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