IPv6 anycast for simple and effective service-oriented communications
IEEE Communications Magazine
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Today, the use of anycast address is quite limited. One of the reasons is that there is no routing protocol providing a global anycasting service. In this paper we design and implement a new anycast routing protocol called PIA-SM (Protocol Independent Anycast Sparse Mode). We focus on PIM-SM (Protocol Independent Multicast Sparse Mode), which is one of multicast routing protocols available now, to develop an anycast routing protocol, because anycast and multicast have many similar properties. We modified PIM-SM based on differences between multicast and anycast. We next describe the technical issues to be solved in the implementation of PIA-SM. We also show some experimental results to demonstrate PIA-SM, and verify that PIA-SM enables routers to forward an anycast packet to an appropriate node of multiple candidate nodes.