From 622a1d0f9886d992ca09ee98e2f14e14f2d99d17 Mon Sep 17 00:00:00 2001 From: Tsimafei Bredau Date: Sun, 17 May 2020 20:36:36 +0300 Subject: [PATCH] update upstream filters description Signed-off-by: Tsimafei Bredau --- docs/root/intro/arch_overview/upstream/upstream_filters.rst | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/docs/root/intro/arch_overview/upstream/upstream_filters.rst b/docs/root/intro/arch_overview/upstream/upstream_filters.rst index 1fe902dcf919..28200626496f 100644 --- a/docs/root/intro/arch_overview/upstream/upstream_filters.rst +++ b/docs/root/intro/arch_overview/upstream/upstream_filters.rst @@ -4,8 +4,10 @@ Upstream network filters ======================== Upstream clusters provide an ability to inject network level (L3/L4) -:ref:`filters `. The filters apply to the -connection to the upstream hosts, using the same API presented by listeners for +filters. It should be noted that network fitler needs to +be registered in code as an upstream filter before usage. Currently +there are no upstream filters available in envoy out of the box. +The filters apply to the connection to the upstream hosts, using the same API presented by listeners for the downstream connections. The write callbacks are invoked for any chunk of data sent to the upstream host, and the read callbacks are invoked for data received from the upstream host.