DVMRP_PROBE
case DVMRP_PROBE:
case DVMRP_PROBE: return "neighbor probe ";
update_neighbor(vifi, src, DVMRP_PROBE, p, datalen, level);
if (msgtype == DVMRP_PROBE) {
IGMP_DVMRP, DVMRP_PROBE,
case DVMRP_PROBE: