T1 Consider reliable pim solution (refresh reduction) A Reliable Transport Mechanism for PIM http://tools.ietf.org/wg/pim/draft-ietf-pim-port/ PORT=PIM-Over-Reliable-Transport T2 If an interface changes one of its secondary IP addresses, a Hello message with an updated Address_List option and a non-zero HoldTime should be sent immediately. See also detect_secondary_address_change See also CAVEAT C15. See also RFC 4601: 4.3.1. Sending Hello Messages T3 Lightweight MLDv2 http://tools.ietf.org/html/draft-ietf-mboned-lightweight-igmpv3-mldv2-05 http://www.ietf.org/internet-drafts/draft-ietf-mboned-lightweight-igmpv3-mldv2-05.txt http://www.ietf.org/html.charters/mboned-charter.html T4 Static igmp join fails when loading config at boot time ! Wrong behavior seen at boot time: ! 2010/02/22 08:59:00 PIM: igmp_source_forward_start: ignoring request for looped MFC entry (S,G)=(3.3.3.3,239.3.3.3): igmp_sock=12 oif=eth0 vif_index=2 ! Correct behavior seen later: ! 2010/02/22 09:03:16 PIM: igmp_source_forward_start: ignoring request for looped MFC entry (S,G)=(2.2.2.2,239.2.2.2): igmp_sock=17 oif=lo vif_index=1 ! To see the wrong message at boot: ! debug igmp trace ! interface lo ip igmp ip igmp join 239.2.2.2 2.2.2.2 ip igmp join 239.3.3.3 3.3.3.3 ! ! Interfaces indexes: Interface Address ifi Vif PktsIn PktsOut BytesIn BytesOut eth0 200.202.112.3 2 2 0 0 0 0 lo 127.0.0.1 1 1 0 0 0 0 T5 PIM Neighbor Reduction https://datatracker.ietf.org/doc/draft-wijnands-pim-neighbor-reduction/ "In a transit LAN (no directly connected source or receiver), many of the PIM procedures don't apply. (...) This proposal describes a procedure to reduce the amount of neighbors established over a transit LAN." T6 Single Stream Multicast Fast Reroute (SMFR) Method https://datatracker.ietf.org/doc/draft-liu-pim-single-stream-multicast-frr/ "This document proposes an IP multicast fast convergence method based on differentiating primary and backup PIM join." T7 RFC5384 - The Join Attribute Format "This document describes a modification of the Join message that allows a node to associate attributes with a particular tree." T8 PIM Multi-Topology ID (MT-ID) Join-Attribute http://tools.ietf.org/html/draft-cai-pim-mtid-00 Depends on T7. "This draft introduces a new type of PIM Join Attribute used to encode the identity of the topology PIM uses for RPF." -x-