Multi-robot systems, with their ability to collaboratively navigate and map unknown environments, hold significant promise for a range of applications. In this paper, We strive to enhance the mapping and navigation capabilities of multiple robots to meet the rising demand for efficient multi-robot system and coordination to address real-world challenges. To achieve the objectives, multiple mobile robots are interconnected using a Data Distribution Service (DDS) domain bridging approach within Robot Operating System 2 (ROS2) framework. This strategy leverages the capabilities of DDS to mitigate interference and minimize network traffic. We integrate the robot poses with corresponding laser scans to construct and optimize a pose graph in order to perform a graph-based Simultaneous Localization and Mapping (SLAM) technique leading to a collaborative map. The robots leverage a ROS2 navigation stack to concurrently traverse both mapped and unexplored areas, continuously updating the collaborative map as they discover new regions. We address networking challenges to ensure stable WiFi communication and effective robot collaboration; highlighting the critical role of network stability and synchronization in multi-robot environments, and offer a practical framework for researchers to optimize mapping and navigation in multi-robot systems. The results show significant advancements in indoor multi-robot mapping and navigation, with enhanced coordination and networking reducing downtime and operational risks; promising substantial benefits for various industries.