Document sysctl pmtu_disc based on commit 3654e61137db ("ipvs: add pmtu_disc
option to disable IP DF for TUN packets").
Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
---
Documentation/networking/ipvs-sysctl.txt | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/networking/ipvs-sysctl.txt b/Documentation/networking/ipvs-sysctl.txt
index e4d9235..fb65d4a 100644
--- a/Documentation/networking/ipvs-sysctl.txt
+++ b/Documentation/networking/ipvs-sysctl.txt
@@ -175,6 +175,15 @@ nat_icmp_send - BOOLEAN
for VS/NAT when the load balancer receives packets from real
servers but the connection entries don't exist.
+pmtu_disc - BOOLEAN
+ 0 - disabled
+ not 0 - enabled (default)
+
+ When enabled PMTU discovery(default) and received packets larger than
+ the next MTU, we will send back FRAG_NEEDED message and drop the
+ incoming packet. But if users prefer to fragment regardless of DF bit
+ other than drop the packet, they can disable it.
+
secure_tcp - INTEGER
0 - disabled (default)
--
2.5.5
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