def _set_esi_timeout(self, v, load=False):
    """
    Setter method for esi_timeout, mapped from YANG variable /isns/isns_vrf/esi_timeout (esi-time)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_esi_timeout is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_esi_timeout() directly.

    YANG Description: This specifies VRF instance esi timeout.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=RestrictedClassType(base_type=long, restriction_dict={'range': ['0..4294967295']}, int_size=32), restriction_dict={'range': [u'120..3600']}), is_leaf=True, yang_name="esi-timeout", rest_name="esi-timeout", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'iSNS VRF forwarding esi timeout.Default esi time is 300.', u'hidden': u'esi-timeout'}}, namespace='urn:brocade.com:mgmt:brocade-isns', defining_module='brocade-isns', yang_type='esi-time', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """esi_timeout must be of a type compatible with esi-time""",
          'defined-type': "brocade-isns:esi-time",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=RestrictedClassType(base_type=long, restriction_dict={'range': ['0..4294967295']}, int_size=32), restriction_dict={'range': [u'120..3600']}), is_leaf=True, yang_name="esi-timeout", rest_name="esi-timeout", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'iSNS VRF forwarding esi timeout.Default esi time is 300.', u'hidden': u'esi-timeout'}}, namespace='urn:brocade.com:mgmt:brocade-isns', defining_module='brocade-isns', yang_type='esi-time', is_config=True)""",
        })

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