Q. What are the defaults for Windows Server 2016 Failover Clusters related to latency?
A. In Windows Server 2012 R2 some of the latency related settings of a cluster such as SameSubnetThreshold and CrossSubnetThreshold were modified once Hyper-V VMs were present. In Windows Server 2016 the cluster defaults have changed as follows (to essentially match the values previously used only when Hyper-V was present):
|SameSubnetDelay||1||Frequency heartbeats (HB) sent|
|SameSubnetThreshold||10||Missed HB before interface considered down|
|CrossSubnetDelay||1||Frequency HB sent to nodes on dissimilar subnets|
|CrossSubnetThreshold||20||Missed HB before interface considered down to nodes on dissimilar subnets|
|CrossSiteDelay||1||Frequency HB sent to nodes on dissimilar sites|
|CrossSiteThreshold||20||Missed HB before interface considered down to nodes on dissimilar sites|