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-rw-r--r--Documentation/networking/ip-sysctl.rst6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 6134ff4561e8..4dfe0d9a57bb 100644
--- 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)