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How to Turn on Option 156 on in DHCP for Shoretel VoIP Phones

I know this is a very specific situation, but I thought maybe someone out there has the same or similar setup.  We have Shoretel Phones, plugged into a Dell N3048P switch, which is plugged into a Sophos XG 230 firewall.  I have worked with Shoretel to turn on Option 156 on the router, which allows the phone to be on one VLAN, while the PC that is piggy backing off the phone gets another.  I have auto VoIP turned on the port the phone is plugged in to, it is trunked, and only allows VLAN 1 and 20 and has a native VLAN of 20.  Both the PC and the phoned end up on VLAN 20.

Here are the commands giving to me..

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We request you to fire the following commands in the console of the XG device.
To connect using SSH, you may use any SSH client to connect to port 22 of the SFOS device.
Select option 4. Device console

console> system dhcp dhcp-options add optioncode 156 VoIP DNS optiontype array-of ipaddress

console> system dhcp dhcp-options binding add VoIP_Scope Default_DHCP_Server optionname DNS(156) value 192.201.20.10,192.101.20.10

This is assuming you named the .20 network on the Sophos VoIP_Scope  if you named it something different change it to that

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These commands didn't work and returned a unrecognized command, but by dropping DNS from the first line and Default_DHCP_Server from the second line it accepted.  It is still not working properly.

 

 



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