Can Multiple Network Segments Be Configured in a VLAN?

Hosts on multiple network segments in the same VLAN can communicate after the primary and secondary IP addresses for a VLANIF interface are configured.

As shown in Figure 1, Host_1 and Host_2 in VLAN 10 belong to 10.1.1.1/24 and 10.1.2.1/24 respectively. The two hosts need to communicate.

Figure 1 Communication for hosts on multiple network segments in the same VLAN

Configure the Switch.

[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type access
[Switch-GigabitEthernet0/0/1] port default vlan 10
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port link-type access
[Switch-GigabitEthernet0/0/2] port default vlan 10
[Switch-GigabitEthernet0/0/2] quit
[Switch] interface vlanif 10
[Switch-Vlanif10] ip address 10.1.1.1 24
[Switch-Vlanif10] ip address 10.1.2.1 24 sub
[Switch-Vlanif10] quit

After the preceding configurations are performed, Host_1 and Host_2 can communicate.