def _set_system_description(self, v, load=False):
    """
    Setter method for system_description, mapped from YANG variable /protocol/lldp/system_description (string)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_system_description is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_system_description() directly.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode, restriction_dict={'length': [u'1..50']}), is_leaf=True, yang_name="system-description", rest_name="system-description", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'cli-full-command': None, u'cli-multi-value': None, u'info': u'The System Description.'}}, namespace='urn:brocade.com:mgmt:brocade-lldp', defining_module='brocade-lldp', yang_type='string', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """system_description must be of a type compatible with string""",
          'defined-type': "string",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode, restriction_dict={'length': [u'1..50']}), is_leaf=True, yang_name="system-description", rest_name="system-description", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'cli-full-command': None, u'cli-multi-value': None, u'info': u'The System Description.'}}, namespace='urn:brocade.com:mgmt:brocade-lldp', defining_module='brocade-lldp', yang_type='string', is_config=True)""",
        })

    self.__system_description = t
    if hasattr(self, '_set'):
      self._set()