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Autodiscovery The process of discovering all the PEs with members in a given MVPN Similar to RFC4364, but: New address family MCAST-VPN Contains address of the originating PE Contains tunnel attribute to specify what sort of tunnel (e.g. PIM-SSM, mLDP, etc.) can be supported by this PE, and whether aggregation is supported May contain a tunnel ID Can also be used to discover set of PEs interested in a given group (to enable S-PMSI creation) |