Per the object's description this reports the destination IP address for this transit tunnel row, identifying the tail-end the dynamically-signaled LSP is ultimately headed toward, even though this router only relays it partway. An admin uses this value to figure out, from a purely midpoint vantage point, which end-to-end service a given transit LSP belongs to without having access to the head-end's own tunnel table. For example, a destination of 10.30.0.9 tells the admin this transit row belongs to the LSP terminating at that specific PE, useful when isolating which customer's traffic is affected by a link flap on this node.