This paper presents the modeling and simulation of a Very High Frequency Data Link Mode 2 (VDL2) sub network to support Controller Pilot Data Link Communication (CPDLC), at El Dorado International Airport in Bogota City. The modeling and simulation were made in order to determine performance characteristics and determine if VDL2 could meet future traffic load increase. The simulation was performed using Network Simulator 2 (NS2). An overview of the technologies currently used for air-ground communication in Colombia is presented. Also this paper shows a glimpse of the features of the VDL Mode 2 protocol and CPDLC service. The VDL Mode 2 subnet model and the subsequent simulation were derived from the characteristics of Colombian airspace and air traffic conditions in the Bogota Terminal Area (TMA). Finally, the simulation results are presented.