Labels:text | screenshot | diagram | rectangle | line | plan | parallel OCR: INTER-VLAN COMMUNICATIONS One port por VLAN Using a global port VLAN 1 VLAN 2 VLAN 1 LAN 2 Router Router Figure 3. In the left portion of this figure, a conventional router is used to enable inter-VIAN communien- tions. Because one port is required per VLAN, this configuration can be costly as well as detrimental to router performance. In contrast, a router with a global port, illustrated in the right portion of the figure, can support multiple IP subnets on a single port.