I have 2 hosts with HA and FT, each has a fiber link to iSCSI san. Each also has separate a vswitch for guests (vswitch1) and console/vmkernel (vswitch0).
I lost physical connectivity to the switch (it was power cycled). I got an alert about vswith0 losing connectivity, no alert about vswitch1.
Here's the weird bit - when the switch came back online, ALL of the guests on both hosts were powered off.
As far as I can tell the fiber switch did not lose power - so the connection to the SAN *should* have been good the entire time.
My theory is that both hosts tried to vMotion their guests to the other host, which was also down, and the net result is everyting powers off.
Question 1: would loss of L1 connection for console/kernel cause all guests to end up powered off?
Question 2: if I lost connection from hosts to SAN, shouldn't I see an alert related to the storage adapters as well?