Nowadays, there is a drastic increase in the number of sensors enabled devices connected to the Internet. Low power and lossy network (LLN) is a network, which consists of several embedded devices with limited memory, power and processing resources. Energy preservation and network lifetime enhancement are the major challenges in LNN. Hence, the routing plays a vital role in LLN, as an Internet of Things (IoT) device need to take the decision accordingly. In LNN, the inefficient route selection results in increased energy depletion, traffic and packet loss ratio. The proposed work introduces Load and battery discharge index (BDI) based composite routing metric in IPV6 Routing Protocol for Low power and lossy network (RPL). The COOJA simulator used to evaluate the performance of the proposed work. It provides the better result in terms of network lifetime and packet delivery ratio (PDR) against the routing metric such as hop count, ETX, RER, RER (BDI) and traffic load.