We run stretched layer 2 and we have the e911 service setup to correspond for each location. We run different sub-nets for each location as well. I'm wondering if there is a way to limit a users phone to only accept a DHCP Lease from a specific sub-net. The phones do run on their own VLAN, but this doesn't solve our e911 issue.
Alternately, is there a way to receive a notification or auto assign the information based on the information.
Again, ideally I'd like to simply not allow the phone to connect if it changes sub-nets which would force the user to call the tech desk to have the phone provisioned again.
If it's relevant...The city our HQ is located in actually has three buildings in completely different parts of town. On occasion we will have an employee decide to move (or get moved by management) but they don't notify IT which causes the problem.