ifr_arp_muxid
ifr.ifr_arp_muxid = -1;
arp_muxid = ifr->ifr_arp_muxid;
ifr->ifr_arp_muxid = arp_muxid;
&(ifr.ifr_arp_muxid))) != 0) {
DBG2("UDP-ARP-%s muxid: %d\n", rootfs.bo_ifname, ifr.ifr_arp_muxid);