An improved PIM-SM tree recovery algorithm

Multicast tree recovery in protocol independent multicast-sparse mode (PIM-SM) networks is initiated by state changes in the underlying unicast routing protocol. A substantial part of the subsequent data loss can be attributed to the non-reductive events, e.g. link addition. We propose and evaluate an improvement to the standard PIM-SM recovery procedure, showing that the data loss can be significantly decreased regardless of the topology and session parameters.