A single destination of this P2MP tunnel. That is, a
routable TE address of a leaf. This will often be the TE
Router ID of the leaf, but can be any interface address.
When a signaling protocol is used, this object corresponds
to the S2L Sub-LSP destination address field in the
S2L_SUB_LSP object.
This object is interpreted in the context of
cmplsTeP2mpTunnelDestDestinationType.