code: def ping(self, destination, source=c.PING_SOURCE, ttl=c.PING_TTL, timeout=c.PING_TIMEOUT,
               size=c.PING_SIZE, count=c.PING_COUNT, vrf=c.PING_VRF):
          
          raise NotImplementedError
docs: Executes ping on the device and returns a dictionary with the result
  
          :param destination: Host or IP Address of the destination
          :param source (optional): Source address of echo request
          :param ttl (optional): Maximum number of hops
          :param timeout (optional): Maximum seconds to wait after sending final packet
          :param size (optional): Size of request (bytes)
          :param count (optional): Number of ping request to send
  
          Output dictionary has one of following keys:
  
              * success
              * error
  
          In case of success, inner dictionary will have the followin keys:
  
              * probes_sent (int)
              * packet_loss (int)
              * rtt_min (float)
              * rtt_max (float)
              * rtt_avg (float)
              * rtt_stddev (float)
              * results (list)
  
          'results' is a list of dictionaries with the following keys:
  
              * ip_address (str)
              * rtt (float)
  
          Example::
  
              {
                  'success': {
                      'probes_sent': 5,
                      'packet_loss': 0,
                      'rtt_min': 72.158,
                      'rtt_max': 72.433,
                      'rtt_avg': 72.268,
                      'rtt_stddev': 0.094,
                      'results': [
                          {
                              'ip_address': u'1.1.1.1',
                              'rtt': 72.248
                          },
                          {
                              'ip_address': '2.2.2.2',
                              'rtt': 72.299
                          }
                      ]
                  }
              }
  
              OR
  
              {
                  'error': 'unknown host 8.8.8.8.8'
              }