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What is the Solution? The ISIS router will advertise that BFD is running on an interface in a TLV in the IIH. If no advertisement, don’t attempt a BFD session w/ that neighbor. When receiving an IIH from a neighbor on an interface with BFD enabled, and if the IIH contains the BFD enabled TLV: Then the establishment of a BFD session with that neighbor will be required before allowing the adjacency to the neighbor to reach the UP state. Will require 3-way on p2p BFD-ISIS interaction.2 (ISIS WG) |