def get_default_config(self):
        """
        Override SNMPCollector.get_default_config method to provide
        default_config for the SNMPInterfaceCollector
        """
        default_config = super(SNMPInterfaceCollector,
                               self).get_default_config()
        default_config['path'] = 'interface'
        default_config['byte_unit'] = ['bit', 'byte']
        return default_config

        Override SNMPCollector.get_default_config method to provide
        default_config for the SNMPInterfaceCollector
        
src/collectors/snmpinterface/snmpinterface.py