How can I create an isolated network in VMWare?

Hello Experts,
I have been asked to setup an isolated network in our VCenter, and I’m not sure how this is done.  Here is what I think has to happen:
1.      Setup a new VLAN on the VCenter virtual switch.
2.      The VCenter solution connects to two HP switches (for redundancy), so the new VLAN must be created on both the HP switches.  I’m guessing that the new VLAN will use the existing trunk ports between the virtual switch in VCenter and the HP switches.
3.      The two HP switches connect to a distribution level datacenter switch (Cisco , so the new VLAN must be created on the datacenter switch.  Again, I’m guessing that the new VLAN will use existing trunk ports.
4.      The datacenter switch connects to our core switch, so the new VLAN must be created on the core switch.  Again, I’m guessing that the new VLAN will use existing trunk ports.
5.      The core switch connects to our ASA.
6.      Our ASA connects to the internet.
Does this sound about right to all of you?
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If the VMs in this isolated network do not need Internet access, all you need to do is create a new vSwitch in vCenter & do NOT add a vmnic to the vSwitch. Create a VM Network Port Group, then add VMs using this VM Network Port Group to the VMs vNICs. The VMs will be able to communicate among themselves, but not external from the Host they're on (i.e. LAN) or the Internet.

Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Just create a Virtual Machine Network Portgroup on a vSwitch with no physical network interfaces.
ndalmolin_13Author Commented:
I do need to connect to the Internet.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
That does not make it isolated?

you would need to connect another nic in the VM to the internet, or create and use a router, to isolate your network, but allow traffic to be routed to the internet.
Well, isolating from other LAN traffic, you can use VLANs. I would still create another vSwitch to moreso isolate traffic from other VMs. Attach a pNIC or 2 to the new vSwitch, create a VM Network Port Group & assign a VLAN to it. The pNIC on the Host will need to be connected to a trunk port on your phys switch which in turn will need to be routed externally to access the Internet.


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ndalmolin_13Author Commented:
Thanks all
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