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From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 Mar 2019 17:00:56 +0100
Subject: networkd: clarify that IPv6 RA uses our own stack, no the kernel's
Fixes: #8906
(cherry picked from commit c4a05aa1a8338013108d099de805f3262a871c0f)
---
man/systemd.network.xml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index ee464ff..12be72a 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -632,6 +632,11 @@
url="https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt">ip-sysctl.txt</ulink> in the kernel
documentation regarding <literal>accept_ra</literal>, but note that systemd's setting of
<constant>1</constant> (i.e. true) corresponds to kernel's setting of <constant>2</constant>.</para>
+
+ <para>Note that if this option is enabled a userspace implementation of the IPv6 RA protocol is
+ used, and the kernel's own implementation remains disabled, since `networkd` needs to know all
+ details supplied in the advertisements, and these are not available from the kernel if the kernel's
+ own implemenation is used.</para>
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