In this paper, the hybrid bootstrap mechanism for multicast routing in PIM-SM is presented and its performance is evaluated. Since the hybrid bootstrap mechanism consists of distributed and centralized processes, it is called hybrid one. The key for the hybrid method is that the role of a rendezvous point (for short, RP) selection is played in a bootstrap router (BSR), not that a designated router (DR), because the process of the RP-Set distribution is not needed. Especially, the hybrid method finds the RP by communication between the DR and the BSR. Evaluation results show that the hybrid method can reduce efficiently the processing delay about more than 50% by compared with that of the traditional one.
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