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How Does NLB Detect a Server Failure?

April 26, 2017detect failure nlb server

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How Does NLB Detect a Server Failure?

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NLB Cluster host emits “heartbeats” to the other hosts in the cluster. If a host fails and stops emitting heartbeats, then after a default time period of 5 seconds, the remaining hosts in the cluster undergo a process called convergence to remove the failed host from the cluster and have new client connection requests mapped to remaining hosts in the cluster.