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This standard specifies a meshed tree bridging protocol for the purpose of forwarding unicast, multicast and broadcast frames in a loop free forwarding topology with zero convergence time on detection of link or switch failure. The meshed tree scheme imposes low operational and control overhead by operating through local information dissemination without flooding or forwarding link details to all switches in the topology. Advanced features are incorporated from the ground-up by defining two… read more additional mutually non-exclusive modes; secure and static topology construction. read less

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The scope of this document is as follows: a) In bridged networks running MTBP, ports shall be identified as either a meshed tree port that participates in the meshed tree resolution, or a host port, to which a local host is connected. Only meshed tree ports are allowed to participate in the meshed tree resolution. b) MTBP provides superior fault tolerance by preconfiguring several logical trees from a root. One of these logical trees is considered the primary tree and is used for forwarding… read more broadcast frames. In the event of a network component failure and immediately on failure detection of the primary branch, broadcast frame forwarding is taken over by any one of the other preconfigured tree branches. This is achieved with minimal message dissemination and delay. c) The addition of a bridge configured to run MTBP will allow the bridge to send a request to join (via MT_JOIN message) message to all other bridges to which it is connected. The new bridge will join the bridges already in the topology. The new bridge then receives multiple invitations from its neighbors to join tree branches that they are already part of. The new bridge decides to join the multiple tree branches and stores the multiple paths in order of preference. One of these paths shall be the path for broadcast frame forwarding. read less

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