I believe common VLAN among all hosts in cluster is a pre-requisite for DRS but not for HA?
Scenario:-
I've 4 hosts in a DRS enabled cluster with shared storage but all of them don't have all the VLAN's :-
Host1 - VLAN1 & 2
Host2 - VLAN1 & 2
Host3 - VLAN1,2,3 & 4
Host4 - VLAN1,2,3 & 4
Question 1
I believe common VLAN is a pre-requisite for DRS?
The VM's connected to VLAN 3 & 4 will always be moved only between Host 3 & Host 4 by DRS. Correct?
DRS will never move the VM's connected to VLAN 3 & VLAN 4 to Host 1 & Host 2 as those VLAN's are not there on Host 1 & 2?
Question 2
I don't believe common VLAN is a pre-requisite for HA?
How about HA? In case of Host 3 failure will the VM's with VLAN 3 & 4 be restarted only on Host 4 or they'll be restarted on any of the Hosts irrespective whether the VLAN 3 & 4 are available on other hosts or not?