This object reports whether the static decap tunnel is actually operational right now, the egress-side counterpart to the ingress tunnel's oper-state object. On a decap entry specifically, an unexpected oper-down state often points to labeled traffic simply never arriving from the expected remote ingress PE, rather than a local configuration problem, since this side of the tunnel is purely a receiver. For example, finding this decap tunnel administratively enabled but operationally down would prompt the admin to check whether the remote ingress tunnel is actually sending traffic at all.