Ad-hoc network is an autonomous mobile node. It is a set of temporary based networks, which has not fixed infrastructure. The Ad-hoc networks are very much positive towards attack by malicious node due to its vulnerabilities nature of routing protocols. There are large numbers of attacks affect the Ad-hoc networks. In between these attacks one is very much known as black hole attack. In this paper, the authors simulate the Ad hoc On-demand Distance Vector Routing protocol (AODV) under blackhole attack by considering different performance metric. The simulation results show the effectiveness of blackhole attack on AODV protocol.