Previous Hosts
==============





Previous Hosts :ref:`configuration overview <arch_overview_http_retry_plugins>`.

This extension does not have a structured configuration, `google.protobuf.Empty
<https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty>`_ should be used
instead.


.. _extension_envoy.retry_host_predicates.previous_hosts:

This extension may be referenced by the qualified name ``envoy.retry_host_predicates.previous_hosts``

.. note::
  

  This extension is intended to be robust against untrusted downstream traffic. It assumes that the upstream is trusted.

.. tip::
  This extension extends and can be used with the following extension category:


  - :ref:`envoy.retry_host_predicates <extension_category_envoy.retry_host_predicates>`