This paper presents an effort to enhance teaching and learning processes of several Computer Networking courses at the Department of Computer and Networking Engineering, State Polytechnic of Ujung Pandang. The use of virtualization technique is proposed to deal with limited capacities of computer laboratory to serve various practical courses. Some simulation software is selected and also associated laboratory practice modules are documented. After conducting remastering technique in Linux environment, a novel Integrated Virtual Lab for Computer Networking courses is produced.