We have a small network with two managed switches and two unmanaged (basic netgear 10/100) switches.
I would like to get to grips with VLAN's after creating another subnet. Currently we only have one subnet 192.168.1.0/24. I am planning on adding a test subnet of 192.168.5.0/24 and then adding that subnet to a new VLAN.
I was wondering, before I begin reading up on VLANs and how to configure them in the simplest form, if I can even use them on our network. The reason I am unsure is because one of the managed switches is maintained by BT (British Telecom) because of our IP phone system. I can't add VLAN information to this switch, and it's guaranteed that some workstations are connected either directly to that switch, or via an IP phone.
The switch I do have control over that's managed is a D-Link 3550, and we are using a Draytek Vigor 2820 router which supports VLANs.
So the question; if I setup a VLAN will it work if only the main router and one of the managed switches are 'aware' of the VLAN?