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[net,4/4] ipvs: Document sysctl pmtu_disc

Message ID 1487313241-11361-5-git-send-email-liuhangbin@gmail.com
State Awaiting Upstream, archived
Delegated to: David Miller
Headers show

Commit Message

Hangbin Liu Feb. 17, 2017, 6:34 a.m. UTC 
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@gmail.com>
---
 Documentation/networking/ipvs-sysctl.txt | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

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)