--- zzzz-none-000/linux-3.10.107/Documentation/networking/ip-sysctl.txt	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/Documentation/networking/ip-sysctl.txt	2021-11-10 11:53:52.000000000 +0000
@@ -166,6 +166,14 @@
 	Path MTU discovery (MTU probing).  If MTU probing is enabled,
 	this is the initial MSS used by the connection.
 
+tcp_min_snd_mss - INTEGER
+	TCP SYN and SYNACK messages usually advertise an ADVMSS option,
+	as described in RFC 1122 and RFC 6691.
+	If this ADVMSS option is smaller than tcp_min_snd_mss,
+	it is silently capped to tcp_min_snd_mss.
+
+	Default : 48 (at least 8 bytes of payload per segment)
+
 tcp_congestion_control - STRING
 	Set the congestion control algorithm to be used for new
 	connections. The algorithm "reno" is always available, but