This work provides the concept of mobility based VANET network in which all nodes are dynamically provided. This work presents the concept of network reconfiguration with Sybil attack detection and handling in VANET. It presents the concept by prediction based routing under shortest path in network. It also provides the concept of detection and prevention of Sybil attack in this network. Among multiple types of attacks, the main aim of the present study will be Sybil attack, which is a well-known attack. It is most vulnerable in open & broadcast network schemes. The use of Sybil attack decrease the system performance by creating malicious nodes. So, it is necessary to detect and prevent from these types of attacks. The proposed work presented the cases by taking different number of nodes with simulation time 50 ms. The work is being evaluated in terms of throughput and end to end delay with different number of nodes and simulation time.