I am implementing a VLAN per subnet plan, that at the moment is a flat network with secondary addresses on the 4503 switch:
I have a customer that has his router uplinked to my switch with an ethernet interfrace. He has two of the subnets with NATed address on them.
He has the second subnet added with a secondary address on his ethernet interface.
All subnets are in VLAN 1 on my side at the moment and everything is working with no problem.
When I start moving the subnets into their own VLAN, how can I make sure he maintains connection with his single interface.
Do I need to have him trunk his interface and me do the same on the switch port?
Or is there a way to do it without him doing anything?