Simple IP subnet VLAN implementation

This paper describes a simple method of implementing an IP subnet VLAN. Normally, switches have to exchange VLAN membership information with its neighboring switches via some form of VLAN registration protocol. This is to ensure proper operation of VLAN forwarding and VLAN filtering services in a LAN. However, in the implementation done by the authors in this paper, no VLAN membership information is exchanged between any switches. The VLAN registration protocol is simply replaced by the router that sends a simple periodic multicast packet to all switches in the LAN. Some conformance testing is done to verify the correctness of the implementation. Some minor limitations about the implementation are described as well.