ESXi “Management traffic” tickbox, what does it do?

I have seen this popping up various times over the last few years. That little tickbox on your VMkernel NIC that says “Management traffic” (aka management network) what is it for? What if I untick it, will SSH to that VMkernel still work? Will the HA heartbeat still work? Can I still ping the VMkernel NIC? … [Read more...]

Testing your infrastructure!

Last week I was helping someone on the VMTN community forums. They were hitting what appeared to be strange HA behavior. After some standard questions this person told me that all VMs were powered down after a network outage. Sounds like a familiar problem? Yes I can hear most of you think: Isolation response set to … [Read more...]

VMware: The number of heartbeat datastores for host is 0

Today I added some vSphere 5.0 u1 hosts in a new created cluster, the SAN will be delivered next week so I didn’t have central storage, to finish my new cluster setup I configured HA and DRS. After configuring HA I received this warning message:   The number of heartbeat datastores for host is 0, […] … [Read more...]