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A transit router connects the physical links for a hub and two spokes.
The hub accepts dynamic registrations on its multipoint tunnel.
Use the same network identifier on the spoke and configure the hub as its next hop server.
The first spoke can reach the hub address on the physical network.
Its incorrect hub mapping keeps it from registering or reaching the hub through the tunnel.
The second spoke still reaches the hub through its working tunnel.
Correct the hub mapping on the first spoke.
The hub learns the first spoke and both peers now appear up.
Verify that the first spoke can reach the hub and the other spoke over the overlay.
Check the learned mapping for the second spoke.