The pass-through module provides a direct connection between the optional internal Ethernet mezzanine card in the blade, and an external Ethernet device. The Ethernet pass-through modules are hot-pluggable, and may be installed in any of the three Fabrics - A, B or C. External connectors on the Ethernet pass-through module correspond directly to the blade number. For example, blade 5 is connected to port 5 on the Ethernet passthrough module. Ethernet media speed is configured through the blade LOM firmware or by the operating system. Speed and duplex settings are not configured through the passthrough module itself. The pass-through module does not have VLAN configurations on it, The VLAN configurations would be done on the server and the switch that you choose to plug the servers into. Then if you need to communicate from one VLAN to another VLAN, you will need to have Layer 3 switch to perform the routing. But looking at VMWARE security recommendations the Vmotion traffic stays isolated and is not routable. "The security issue with vMotion migrations is that information is transmitted in plain text, and anyone with access to the network over which this information flows can view it. Ensure that vMotion traffic is separate from production traffic on an isolated network. This network should be nonroutable (no layer-3 router spanning this and other networks), which will prevent any outside access to the network." More information like this can be read in this document. www.vmware.com/.../VMW-TWP-vSPHR-SECRTY-HRDNG-USLET-101-WEB-1.pdf Here is also the user guide for the pass-through module. support.dell.com/.../PTMUGadm.pdf Hope this info helps, Thanks.
Hey!  I`ve just recived a new bladerack from dell(m1000e) with 10 GbE Pass-Through-module. We are going to use this rack with m620 blades for vmware, and i was wondering if how can i configure Vmotion when its on a diffrent subnet(vlan) Do i have to configure all the ports on the A2 to use spesific vlan and use all the ports to enable vmotion on all 16 blades?Or can i configure all blades to point to one external port even though its 10 GbE Pass-Through-module? 
Vmware and 10 GbE Pass-Through-module