Configure Inter-VLAN routing on Cisco Router - Jesin's Blog
router - Physical Interface VS Multipoint Subinterface in Cisco Frame Relay - Server Fault
Sub-Interfaces
Configure Cisco ROAS (Router On A Stick) - Study CCNA
How to Configure Inter-VLAN Routing | SYSNETTECH Solutions
29. Cisco SD-WAN Subinterface Template - RAYKA
Example for Configuring Sub-interfaces to Implement Inter-VLAN Communication - AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 CLI-based Typical Configuration Examples - Huawei