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IP anycast allows a source node to transmit IP packets to a single destination node, out of a group of destination nodes. It can be an important paradigm for an ad-hoc network in terms of resource, robustness and efficiency for replicated service applications. DSR is a simple and efficient routing protocol designed specifically for use in multi-hop wireless ad hoc networks of mobile nodes. This paper proposes a novel anycast protocol for IPv6 flow in mobile ad hoc networks, which is based on the DSR protocol. We also test its performance with different network parameters and the simulation results show that the anycast protocol can balance the network load efficiently and reduce the delay of packet and improve the network throughput. Anycast service can also improve performance of ad hoc network when mobility is high and a link may get disconnected frequently without the servers of repair/re-discovery due to ad-hoc network environment.