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




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

.. _extension_envoy.retry_host_predicates.previous_hosts:

This extension has 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>`



  This extension must be configured with one of the following type URLs:



  - :ref:`type.googleapis.com/envoy.extensions.retry.host.previous_hosts.v3.PreviousHostsPredicate <envoy_v3_api_msg_extensions.retry.host.previous_hosts.v3.PreviousHostsPredicate>`