oooops, that's bad news.
The switches can do VLAN, but only untagged, if the attached device does not support tagging.
And untagged VLAN does not support QOS, which would be highly recommended for ISCSI traffic.
So no plans to support tagging in DSS will make us have to think about a different storage solution
in our new environment.
BTW, it should not be difficult to implement this, it's just a simple NIC configuration parameter
for the supported NICs drivers.
Yes you are correct that it is not difficult to implement but where the complexity comes into play here is the work in the GUI and the QA team testing and more.