No need or reason to supernet. You don't want phones/pcs in same broadcast domain]
Almost got caught on that one myself. The OP said "superscope" not "supernet". I had to read it through 3 times before it sunk in to my thick head.....lol
I figured you were using VLAN's. The port on your switch would have to have both VLAN's assigned to it and the PVID (primary VLAN ID) should be the VoIP VLAN.
PVID = 1
Allowed VLAN's = 1,2
I know that I could set up a static IP on phones or PCs and eliminate this issue, but, I would like to have DHCP hand out the address to all devices on the network, if possible.
Here's the problem with trying to get DHCP to offer IP's in two different subnets to two different devices plugged into the same port on a switch.
How does DHCP differentiate between the different requests? How does the server know request A is from the VoIP set and requires an IP in subnet 220.127.116.11, and how does it know request B is from the PC and requires an IP in the 18.104.22.168 subnet. Short answer is, It doesn't and that's why both devices get assigned IP's in the 22.214.171.124 subnet.
This is why I mentioned using static IP's on the computers. You can play around until the cows come home but in the end, you'll find the simple solution is the best one and that is to have one of the two devices staticly assigned their IP settings and the other on DHCP.
I am still not certain on how the ip phone knows to send data to the sip proxy, but, as of right now I am assuming the sip proxy address will be coded into the ip phone.
Like any other network device, the VoIP set's should get a Default Gateway address assigned to them with the TCP/IP settings. This should be the address of whatever device you have that handles the VoIP traffic.
My subnet mask is 255.255.255.0, sprint decided that our voice vlan would use the second octet change from our original scope.
Well, if you're not in control of the router then you have to do whatever you're told too by whomever is. It's odd to change the second octet when your subnet mask shows you''re supposed to be subnetting in the 3'd octet.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.