Design and Implementation of Source-Specific Multicast System over IPv6

摘要

Currently, most IP multicasting applications are implemented based on Any-Source Multicast (ASM) model that supports many to many multicast services. However, it is known that current ASM-based multicast architecture has several deployment problems such as scalability and lack of access control. The Source-Specific Multicast (SSM) working group in Internet Engineering Task Force (IETF) proposed SSM architecture that is based on one to many multicast service model to overcome the weaknesses of ASM architecture. In order to encourage the deployment of SSM, we need an effective and accurate implementation of SSM capable router and host on easily available platforms such as Lima and FreeBSD. Therefore, we present the implementation details of SSM capable router and host, applied to Linux 2.4.21 kernel. Then, we measure the packet forwarding performance of SSM router. The forwarding performance of our implementation shows 95% of wire speed, when the packet length is IPv6 minimum path Maximum Transmission Unit (MTU).