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-rw-r--r--Documentation/networking/ip-sysctl.rst12
1 files changed, 8 insertions, 4 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 8bff728b3a1e..b3fa522e4cd9 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -2835,10 +2835,14 @@ encap_port - INTEGER
Default: 0
plpmtud_probe_interval - INTEGER
- The time interval (in milliseconds) for sending PLPMTUD probe chunks.
- These chunks are sent at the specified interval with a variable size
- to probe the mtu of a given path between 2 endpoints. PLPMTUD will
- be disabled when 0 is set, and other values for it must be >= 5000.
+ The time interval (in milliseconds) for the PLPMTUD probe timer,
+ which is configured to expire after this period to receive an
+ acknowledgment to a probe packet. This is also the time interval
+ between the probes for the current pmtu when the probe search
+ is done.
+
+ PLPMTUD will be disabled when 0 is set, and other values for it
+ must be >= 5000.
Default: 0