Issue with ShoreTel ip480 series phones and Netgear switches

We have a ShoreTel phone system which is currently working with IP230 model phones.    The ShoreTel server and the DHCP server are virtual machines running on VMWare 5.5.  Everything related to the phone system is connected using Netgear FS728TP switches.

I recently tried to add some IP480 series phones to the system without success.   The new phones will not pick up an IP address from the DHCP server.   I will be adding more of these phones in the near future and I do not want to have to manually configure each one and manually track IP addresses.   If I manually configure them they work fine.

I looked on line and found several references to similar issues being resolved by tagging the VLAN on the Netgear switches.   I tried assigning all the ports on the switch the ShoreTel appliances, DHCP server and ShoreTel server are connected to without success.  I changed the PVID  for all the used ports to the VLan ID on the Netgear switch and configured VMWare to use the same VLanID.

Once I was done the IP230 phones could still get an IP address but the IP480 series still failed.   I tried connecting a computer and it pulled in an IP address as well.  

I have included screen shots of the configuration pages for the Netgear switch and VMWare.  

Ports 1-6 on the switch are reserved for the appliances.   Ports 21-24 are connected to the VMWare servers.  The rest of the ports are used for phones.    There are additional switches but I just used this switch for testing since everything is plugged into this switch.

Can anyone see what I have missed?

 FS728tp Tagged portsFS728tp PVID]VMWare vlanVMWare dvPortGroup
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qvfpsAuthor Commented:
ShoreTel, Inc.
 ShoreTel 14.2
 Build 19.44.7901.0
ShoreTel Director
Richard MurphySenior Network AnalystCommented:
I know nothing about Netgear switches but ill try and help out.

Untagged Vlan (native subnet being used by your data network)
Tagged vlan (the vlan being used by your VoIP traffic)
Pvid Same as the native vlan

Then the 480 series will look for your 156 option

Step One – Creating Option 156 in Your Windows DHCP server.

Open the DHCP tool in Windows – Start>Administrative Tools>DHCP
Add all of the Windows DHCP servers to the manager – Right-click DHCP>Add Server… Select This authorized DHCP server and add all the servers by clicking the first, pressing and holding the Shift key and clicking the last server. Click OK.
Click the “+” sign next to the first DHCP server in the left-most pane to expand the options. Right-click IPv4 and select Set Predefined Options.
Click Add and in the Name field, type Shoretel (or whatever you want to name the option).
Set the Data type to String.
Under Code, type 156 and add a description if desired.
Click OK twice.
Step Two – Adding Option 156 to Your Windows DHCP Server’s DHCP scope.

Click the “+” sign next to IPv4, then next to Scope [x.x.x.x] (where x.x.x.x is your scope subnet and name).
Right-click Scope Options and select Configure Options.
On the General tab, scroll down to option 156 and check the box next to it to enable it.
Under the String Value,enter any/all of the following options: ftpservers=x.x.x.x, country=1, language=1, vlanid=n (where x.x.x.x is your ShoreWare Headquarters server’s IP address and n is the VLAN for your ShoreTel IP phones).
Click OK.

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qvfpsAuthor Commented:
The Netgear routers are used exclusively for the phone system there is no data network on them.  They were setup before i started with vlan 600 for VOIP.  Currently our DHCP server has a scope set for the network card attached to the netgear switches which has ioption 156 set and it works fine for all of our current 200 series phones.
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Richard MurphySenior Network AnalystCommented:
Is your DHCP server on the same subnet?
qvfpsAuthor Commented:
The ip of the network card connected to the Netgear switches is on on the same subnet
Richard MurphySenior Network AnalystCommented:
Have you tried adding a DHCP Helper, I was able to replicate the fault by removing the DHCP helper even when it was on the same Subnet.
qvfpsAuthor Commented:
I dont think I can add a DHCP Helper on the Netgear FS728TP switches.
qvfpsAuthor Commented:
I managed to get the phone to configure by using the configuration above and manually setting the VLAN on the phone to 600.
qvfpsAuthor Commented:
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