```suggestion  By default Envoy can use both IPv4 and IPv6 networks.    If your environment does not support IPv6 you should disable it.    This may be the case when using Docker on a non-linux host (see `here for more information regarding IPv6 support in Docker <https://docs.docker.com/config/daemon/ipv6/>`_.    You can disable IPv6 by setting the ``dns_lookup_family`` to ``V4_ONLY`` in your configuration as follows:    ```  