Hoping someone can help, I am no expert with Extreme.
We have an Extreme Summit 250E switch with multiple VLAN's setup. These VLAN's all work as expected only they can all talk to one another meaning anyone with some networking knowledge could easily bypass the security.
I believe this behavior is due to the Voice VLAN (ID 100) being tagged on all ports meaning the devices on the individual VLAN's can also access and communicate across VLAN 100. My problem here is that the phone system provides the DHCP addressing for the networks so therefore all devices need to communicate with this network.
Am i right in thinking I only need to tag the port that the phone system is connected to into each VLAN and that having VLAN 100 tagged for all ports is the cause of the issue?
Sorry if that is a bit vague, pickled head at the moment.