This is a good article about basic router configuration:http://www.tele.pitt.edu/~telelab/labs/General%20Lab%20Documentation/pdf/GeneralLab%20Documentation~Cisco%20Router%20Configuration%20Tutorial~08.20.05.pdf
This link has information about configuring a router ethernet interface:http://www.cisco.com/en/US/docs/routers/access/800/820/software/configuration/guide/routconf.html#wp1015237
I am looking for a router configuration guide which shows how to do basic subnetting. I would like some network diagrams. Is there a Cisco web page containing this informatio?