def interface_is_untagged_member(db, interface_name):
    """ Check if interface is already untagged member"""    
    vlan_member_table = db.get_table('VLAN_MEMBER')
    
    for key,val in vlan_member_table.items():
        if(key[1] == interface_name):
            if (val['tagging_mode'] == 'untagged'):
                return True
    return False