App::Netdisco::SSHCollector::Platform::Aruba
  - arpnip($host,
    $ssh)
- Retrieve ARP entries from device. $host is the
      hostname or IP address of the device. $ssh is a
      Net::OpenSSH connection to the device.
    Returns a list of hashrefs in the format
        "{ mac => MACADDR, ip => IPADDR
        }".