3Com 2928 User Guide - Page 177

1 VLAN Interface Configuration Overview For details about VLAN, refer to VLAN Configuration. For hosts of different VLANs to communicate, you must use a router or Layer 3 switch to perform layer 3 forwarding. To achieve this, VLAN interfaces are used. VLAN interfaces are virtual interfaces used for Layer 3 communication between different VLANs. They do not exist as physical entities on devices. For each VLAN, you can create one VLAN interface. You can assign the VLAN interface an IP address and specify it as the gateway of the VLAN to forward the traffic destined for an IP network segment different from that of the VLAN. Configuring VLAN Interfaces Configuration Task List Perform the tasks in Table 1-1 to configure a VLAN interface: Table 1-1 VLAN interface configuration task list Task Creating a VLAN Interface Modifying a VLAN Interface Remarks Required Create a VLAN interface. You can select to assign an IPv4 address to the VLAN interface in this step or in a separate step. Before creating a VLAN interface for a VLAN, create the VLAN first (select Network > VLAN). For detailed configuration, refer to VLAN Configuration. Optional Assign an IPv4 address to the VLAN interface; shut down or bring up the VLAN interface. Creating a VLAN Interface Select Network > VLAN Interface from the navigation tree and click Create to enter the page for creating a VLAN interface, as shown in Figure 1-1. 1-1