@techreport{kouvelas-pim-refresh-00,
    number =    {draft-kouvelas-pim-refresh-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-kouvelas-pim-refresh/00/},
    author =    {Dino Farinacci and Isidor Kouvelas and Kurt Windisch},
    title =     {{State Refresh in PIM-DM}},
    pagetotal = 7,
    year =      1999,
    month =     feb,
    day =       24,
    abstract =  {This proposal extends the PIM-DM {[}1{]} protocol specification by intro- ducing the PIM State-Refresh control message. When an (S,G) entry is created in a router for a directly connected source, if the interface directly connected to the source is the incoming interface for the entry, a new timer is started: the State- Refresh-Timer {[}SRT(S,G){]}. The State-Refresh-Timer controls periodic transmission of the PIM State-Refresh message, which is propagated hop-by-hop down the (S,G) RPF tree. When received by a router on the RPF interface, the State-Refresh message causes existing prune state to be refreshed. Addition of this heartbeat message solves many of the current problems with PIM-DM. It prevents the periodic timeout of prune state in routers, greatly reducing the re-flooding of multicast traffic down the pruned branches that expire periodically. It also causes topology changes to be realised quicker than the traditional 3 minute timeout.},
}