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Title : Join failure notification for PIM-SM multicast routing
Author(s) : B. Hilt, et al.
Filename : draft-hilt-pim-tree-unreachability-00.txt
Pages : 19
Date : 2007-5-3
Currently, PIM-SM is the most widely deployed multicast routing
protocol in the Internet. Nevertheless this multicast protocol lacks
connectivity debugging function, making it difficult to identify for
example; -multicast routing problem, -source unavailability, -RP
failure, etc... When a host wants to receive a multicast group/
channel, if for any reason the associated tree branch cannot be
built, nothing exists to inform the receiver or its network about
this failure. We propose here a new PIM message suitable for Join
forwarding error notification. It is able to inform where and why
such an error happened in the network and this without using a
multicast traceroute mechanism. This message is also suitable to
reduce globally the impact of useless branches in a PIM domain.
Furthermore it should be used to block DDoS (Distributed Denial of
Service) attacks.
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