From fd11005951920a0cee96f0c56f36d9ff8bc66a41 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Tue, 1 Feb 2022 13:00:51 +0900
Subject: network: xfrm: refuse zero interface ID

Since kernel 5.17-rc1, 5.16.3, and 5.15.17 (more specifically,
https://github.com/torvalds/linux/commit/8dce43919566f06e865f7e8949f5c10d8c2493f5)
the kernel refuses to create an xfrm interface with zero ID.
---
 man/systemd.netdev.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'man')

diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index 449b23d5ac..ff0bdee51f 100644
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -1994,7 +1994,7 @@
         <term><varname>InterfaceId=</varname></term>
         <listitem>
           <para>Sets the ID/key of the xfrm interface which needs to be associated with a SA/policy.
-          Can be decimal or hexadecimal, valid range is 0-0xffffffff, defaults to 0.</para>
+          Can be decimal or hexadecimal, valid range is 1-0xffffffff. This is mandatory.</para>
         </listitem>
       </varlistentry>
       <varlistentry>
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