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

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
......@@ -199,15 +199,16 @@ tcp_early_retrans - INTEGER
Default: 2
tcp_ecn - INTEGER
Enable Explicit Congestion Notification (ECN) in TCP. ECN is only
used when both ends of the TCP flow support it. It is useful to
avoid losses due to congestion (when the bottleneck router supports
ECN).
Control use of Explicit Congestion Notification (ECN) by TCP.
ECN is used only when both ends of the TCP connection indicate
support for it. This feature is useful in avoiding losses due
to congestion by allowing supporting routers to signal
congestion before having to drop packets.
Possible values are:
0 disable ECN
1 ECN enabled
2 Only server-side ECN enabled. If the other end does
not support ECN, behavior is like with ECN disabled.
0 Disable ECN. Neither initiate nor accept ECN.
1 Always request ECN on outgoing connection attempts.
2 Enable ECN when requested by incomming connections
but do not request ECN on outgoing connections.
Default: 2
tcp_fack - BOOLEAN
......
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