How to configure VLAN on cisco router using 802.1q encapsulation protocol
Configuring InterVLAN Routing Using an Internal Router (Layer 3 Card) on Catalyst 5500/5000 and 6500/6000 Switches That Run CatOS System Software - Cisco
CCNA Training » InterVLAN Routing Tutorial
Configure Inter VLAN Routing with the Use of an External Router - Cisco
VLAN Configuration Commands Step by Step Explained