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Commit 7e3a2dc5 authored by Rick Jones's avatar Rick Jones Committed by David S. Miller
Browse files

doc: make the description of how tcp_ecn works more explicit and clear 



Make the description of how tcp_ecn works a bit more explicit and clear.

Signed-off-by: default avatarRick Jones <rick.jones2@hp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8a2cf062

Documentation/networking/ip-sysctl.txt

+9 −8
Original line number Original line Diff line number Diff line
@@ -199,15 +199,16 @@ tcp_early_retrans - INTEGER 
	Default: 2

	Default: 2





tcp_ecn - INTEGER

tcp_ecn - INTEGER

	Enable Explicit Congestion Notification (ECN) in TCP. ECN is only

	Control use of Explicit Congestion Notification (ECN) by TCP.

	used when both ends of the TCP flow support it. It is useful to

	ECN is used only when both ends of the TCP connection indicate

	avoid losses due to congestion (when the bottleneck router supports

	support for it.  This feature is useful in avoiding losses due

	ECN).

	to congestion by allowing supporting routers to signal

	congestion before having to drop packets.

	Possible values are:

	Possible values are:

		0 disable ECN

		0 Disable ECN.  Neither initiate nor accept ECN.

		1 ECN enabled

		1 Always request ECN on outgoing connection attempts.

		2 Only server-side ECN enabled. If the other end does

		2 Enable ECN when requested by incomming connections

		  not support ECN, behavior is like with ECN disabled.

		  but do not request ECN on outgoing connections.

	Default: 2

	Default: 2





tcp_fack - BOOLEAN

tcp_fack - BOOLEAN