Documentation: networking: explain what happens if temp_prefered_lft is too small...

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20231024212312.299370-5-alexhenrie24@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 6134ff4561e8f4c1fcc69edcc61a9537182b390b..4dfe0d9a57bb42e4151a38c6aac9cbd8ddeef11a 100644 (file)
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -2509,7 +2509,11 @@ temp_valid_lft - INTEGER
        Default: 172800 (2 days)
 
 temp_prefered_lft - INTEGER
-       Preferred lifetime (in seconds) for temporary addresses.
+       Preferred lifetime (in seconds) for temporary addresses. If
+       temp_prefered_lft is less than the minimum required lifetime (typically
+       5 seconds), the preferred lifetime is the minimum required. If
+       temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime
+       is temp_valid_lft.
 
        Default: 86400 (1 day)