def get_ip_mac_arp_list(devId, auth,url):
    """
    function takes devid of specific device and issues a RESTFUL call to get the IP/MAC/ARP list from the target device.

    :param devId: int or str value of the target device.

    :param auth: requests auth object #usually auth.creds from auth pyhpeimc.auth.class

    :param url: base url of IMC RS interface #usually auth.url from pyhpeimc.auth.authclass

    :return: list of dictionaries containing the IP/MAC/ARP list of the target device.

    :rtype: list

    >>> from pyhpeimc.auth import *

    >>> from pyhpeimc.plat.termaccess import *

    >>> auth = IMCAuth("http://", "10.101.0.203", "8080", "admin", "admin")

    >>> ip_mac_list = get_ip_mac_arp_list('10', auth.creds, auth.url)

    >>> assert type(ip_mac_list) is list

    >>> assert 'deviceId' in ip_mac_list[0]

    """
    if auth is None or url is None:  # checks to see if the imc credentials are already available
        set_imc_creds()
    ip_mac_arp_list_url = "/imcrs/res/access/ipMacArp/" + str(devId)
    f_url = url + ip_mac_arp_list_url
    r = requests.get(f_url, auth=auth, headers=HEADERS)  # creates the URL using the payload variable as the contents
    try:
        if r.status_code == 200:
            macarplist = (json.loads(r.text))
            if len(macarplist) > 1:
                return macarplist['ipMacArp']
            else:
                return ['this function is unsupported']

    except requests.exceptions.RequestException as e:
            return "Error:\n" + str(e) + " get_ip_mac_arp_list: An Error has occured"