if_sick
extern void if_sick(struct interface *, boolean_t);
if_sick(ifp, _B_TRUE);
if_sick(ifp1, _B_FALSE);
if_sick(ifp, _B_FALSE);
if_sick(ws.ifp, _B_FALSE);
if_sick(ifp, _B_FALSE);
if_sick(ifp, _B_FALSE);