.. _client_features: Well Known Client Features ========================== Authoritative list of features that an xDS client may support. An xDS client supplies the list of features it supports in the :ref:`client_features ` field. Client features use reverse DNS naming scheme, for example ``com.acme.feature``. Currently Defined Client Features --------------------------------- .. It would be nice to use an RST ref here for service.load_stats.v2.LoadStatsResponse.send_all_clusters, but we can't due to https://github.com/envoyproxy/envoy/issues/3091. - **envoy.config.require-any-fields-contain-struct**: This feature indicates that xDS client requires that the configuration entries of type *google.protobuf.Any* contain messages of type *xds.type.v3.TypedStruct* (or, for historical reasons, *udpa.type.v1.TypedStruct*) only. - **envoy.lb.does_not_support_overprovisioning**: This feature indicates that the client does not support overprovisioning for priority failover and locality weighting as configured by the :ref:`overprovisioning_factor ` field. If graceful failover functionality is required, it must be supplied by the management server. - **envoy.lrs.supports_send_all_clusters**: This feature indicates that the client supports the *envoy_api_field_service.load_stats.v2.LoadStatsResponse.send_all_clusters* field in the LRS response. - **xds.config.supports-resource-ttl**: This feature indicates that xDS client supports per-resource or per SotW :ref:`TTL `. - **xds.config.resource-in-sotw**: This feature indicates that the xDS client is able to unwrap *Resource* wrappers within the SotW DiscoveryResponse.