These days inter-domain routing protocol, i.e., BGP (Border Gateway Protocol), is getting complicated day by day due to policy mis-configuration by individual autonomous systems. Existing configuration analysis techniques are either manual or tedious, or do not scale beyond a small number of nodes due to the state explosion problem. To aid the diagnosis of mis-configurations in real-world large BGP systems, this paper presents BGP based on Packet Switching Technology and Inter-VLAN where as packet switching technology is WAN technology. Inter-VLAN is a technology to communicate between two or more VLAN's. A company can send or receive any type of data, either text image, video, etc.