I ended up calling Dell support ... excellent experts there. Actually, the IP based VLAN works very close to what I want to achieve. The missing fact in the user guide is what mode the port needs to be in. Ports using switch port mode and bound to a VLAN just didn't work ... likely because the IP-based vlan was different from the port binding. Dell support suggested using trunk mode, however my answer eventually came from using general mode; all traffic untagged, PVID set to my usual LAN vlan ID and the port accepting traffic from the new IP-based vlan. In this way I'm able to have a physical host DHCP on the corporate lan and a VM on that host bind to a different subnet which is then isolated to the new IP-based vln. 
Hello all, I have a small 2x N3024 stack acting as my L3 core with a 2x 10g lag down to a 5x N2048 stack acting as L2 switch for my PC workstations. The Workstations are all on port assigned VLAN 10 (switchport access vlan 10). I have a bunch of developers who want more-or-less unrestricted access to randomly assign IP addresses for their workstation VM's (Virtualbox and VMware).  As you can imagine, I would like a little control over this situation.  the powerconnect guide I have describes IP-subnet VLAN features but doesn't seem to get into how it actually works and interacts with port based vlan assignments. What I currently have is VLAN 10 assigned to a segment that support the subnet 172.100.x.x which goes up to our L3 core for routing to other segments. What I want to do is to configure IP-based VLAN and then instruct the dev's to config their VM's with a different IP range, let's say 10.10.x.x. Theory here is, I would configure the L3 core with say VLAN 20 and an IP address to include it in L3 routing between subnets, and then configure the L2 workstation switch stack with IP-based VLAN to recognize 10.10.x.x and separate it out onto VLAN 20. However I think the simplified question here is if I nail ports up to VLAN 10, will IP-subnet based VLAN work as I want it to? Or, do I need to create an IP-subnet VLAN for both IP address ranges? Do I need to remove the port-based VLAN assignenment and rely entirely on IP-subnet VLAN processing? If there is a better RTFM on this subject you can point me to I would appreciate it Thanks!
How does IP-subnet vlan'ing work with port based vlans (N2000 & N3000 series)