1. IS-IS Introduction: http://www.ciscopress.com/content/images/1587200015/downloads/ISIS.pdf?session_id={F41FEF9C-B15B-4FF8-A28B-97E28D57D951}
2. Overview: Introduction to Intermediate
System-to-Intermediate System Protocol : http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/insys_wp.pdf
3. Configuring IS-IS for IP on Cisco Routers: http://www.cisco.com/warp/public/97/is-is-ip-config.pdf
4. Configuring Integrated IS-IS: http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c/ipcprt2/1cdisis.pdf