docs: def ignore_cidr(vm_, ip):
      '''
      Return True if we are to ignore the specified IP. Compatible with IPv4.
      '''
      if HAS_NETADDR is False:
          log.error('Error: netaddr is not installed')
          return 'Error: netaddr is not installed'
  
      cidr = config.get_cloud_config_value(
          'ignore_cidr', vm_, __opts__, default='', search_global=False
      )
      if cidr != '' and all_matching_cidrs(ip, [cidr]):
          log.warning('IP "%s" found within "%s"; ignoring it.', ip, cidr)
          return True
  
      return False