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-rw-r--r--Documentation/networking/ip-sysctl.txt18
1 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index b121c5db707f..8be76235fe67 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.
@@ -1048,6 +1057,13 @@ disable_ipv6 - BOOLEAN
address.
Default: FALSE (enable IPv6 operation)
+ When this value is changed from 1 to 0 (IPv6 is being enabled),
+ it will dynamically create a link-local address on the given
+ interface and start Duplicate Address Detection, if necessary.
+
+ When this value is changed from 0 to 1 (IPv6 is being disabled),
+ it will dynamically delete all address on the given interface.
+
accept_dad - INTEGER
Whether to accept DAD (Duplicate Address Detection).
0: Disable DAD