![LAN Switching Configuration Guide, Cisco IOS XE Release 3S - VLANs over IP Unnumbered SubInterfaces [Cisco IOS XE 3S] - Cisco LAN Switching Configuration Guide, Cisco IOS XE Release 3S - VLANs over IP Unnumbered SubInterfaces [Cisco IOS XE 3S] - Cisco](https://www.cisco.com/c/dam/en/us/td/i/300001-400000/340001-350000/346001-347000/346929.eps/_jcr_content/renditions/346929.jpg)
LAN Switching Configuration Guide, Cisco IOS XE Release 3S - VLANs over IP Unnumbered SubInterfaces [Cisco IOS XE 3S] - Cisco
Example for Configuring Sub-interfaces to Implement Inter-VLAN Communication - AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S CLI-based Typical Configuration Examples - Huawei
![cisco - Can not create sub-interface like `interface gigabitEthernet 2/1.100` - Network Engineering Stack Exchange cisco - Can not create sub-interface like `interface gigabitEthernet 2/1.100` - Network Engineering Stack Exchange](https://i.stack.imgur.com/yWXk4.jpg)