i_ipadm_is_vni
if (i_ipadm_is_vni(ipaddr.ipadm_ifname))
isvni = i_ipadm_is_vni(ifname);
if (!i_ipadm_is_vni(ifname) && dlstatus == DLADM_STATUS_OK &&
extern boolean_t i_ipadm_is_vni(const char *);