Sub-interface

In the network shown in Figure 1, multiple sub-interfaces are configured on the physical interface of Device. Like a physical interface, each sub-interface can be configured with one IP address. The IP address of a sub-interface must be on the same network segment as the IP address of a remote network, and the IP address of each sub-interface must be on a unique network segment.

Figure 1 GE Sub-interface

With these configurations, a virtual connection is established between a sub-interface and a remote network. This allows the remote network to communicate with the local sub-interface and consequently communicate with the local network.