Cisco router setup sub interface for intervlan routing - YouTube
How-to Configure Router on a Stick - Cisco
Cannot ping sub interface from my remote site VPN gateways - eehelp.com
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
Virtual Trunk Protocol - ppt video online download