This is the destination IP address this static co-routed tunnel is pinned toward, also inheriting the tunnel-group's address if unspecified and immutable once created. Because the tunnel is co-routed, an admin knows this single destination effectively anchors both the outbound path and, symmetrically, the source of the return path -- a wrong value here misdirects the entire bidirectional circuit rather than one leg. For example, a destination accidentally set to 10.95.0.50 instead of the intended 10.95.0.5 sends the whole two-way circuit toward the wrong remote device.