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Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index ec5de02f543..7f98aa3962c 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -168,7 +168,16 @@ tcp_dsack - BOOLEAN Allows TCP to send "duplicate" SACKs. tcp_ecn - BOOLEAN - Enable Explicit Congestion Notification in TCP. + 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). + 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. + Default: 2 tcp_fack - BOOLEAN Enable FACK congestion avoidance and fast retransmission. |