We have multiple large Hyper-V clusters with 100's of VM and the network people need to perform maintenance that will take ~ 10 minutes with unpredictable network connectivity. The only option I can find is to shutdown / save all VM - The cluster is already tuned to ride the maximum allowed network failure of 45 seconds (SameSubnetThreshold=30 & SameSubnetDelay=1500). Is there a way to "suspend" the entire cluster such that VM continue running (All VHDx are thick so not VHDx expansion needed)? VM will also lose network, but they would handle it like when a stand-alone server looses network - up to the application.
IE temporarily configure it to take no action and ignore all failures? VMWare appear to have a way to pause the entire cluster functionality (disable Host Monitoring) without affecting running VM.