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-rw-r--r--Documentation/networking/ip-sysctl.txt45
1 files changed, 37 insertions, 8 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index ab0230461377..974ab47ae53a 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -73,6 +73,14 @@ fib_multipath_use_neigh - BOOLEAN
0 - disabled
1 - enabled
+fib_multipath_hash_policy - INTEGER
+ Controls which hash policy to use for multipath routes. Only valid
+ for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.
+ Default: 0 (Layer 3)
+ Possible values:
+ 0 - Layer 3
+ 1 - Layer 4
+
route/max_size - INTEGER
Maximum number of routes allowed in the kernel. Increase
this when using large numbers of interfaces and/or routes.
@@ -594,6 +602,14 @@ tcp_fastopen - INTEGER
Note that that additional client or server features are only
effective if the basic support (0x1 and 0x2) are enabled respectively.
+tcp_fastopen_blackhole_timeout_sec - INTEGER
+ Initial time period in second to disable Fastopen on active TCP sockets
+ when a TFO firewall blackhole issue happens.
+ This time period will grow exponentially when more blackhole issues
+ get detected right after Fastopen is re-enabled and will reset to
+ initial value when the blackhole issue goes away.
+ By default, it is set to 1hr.
+
tcp_syn_retries - INTEGER
Number of times initial SYNs for an active TCP connection attempt
will be retransmitted. Should not be higher than 127. Default value
@@ -640,11 +656,6 @@ tcp_tso_win_divisor - INTEGER
building larger TSO frames.
Default: 3
-tcp_tw_recycle - BOOLEAN
- Enable fast recycling TIME-WAIT sockets. Default value is 0.
- It should not be changed without advice/request of technical
- experts.
-
tcp_tw_reuse - BOOLEAN
Allow to reuse TIME-WAIT sockets for new connections when it is
safe from protocol viewpoint. Default value is 0.
@@ -853,12 +864,21 @@ ip_dynaddr - BOOLEAN
ip_early_demux - BOOLEAN
Optimize input packet processing down to one demux for
certain kinds of local sockets. Currently we only do this
- for established TCP sockets.
+ for established TCP and connected UDP sockets.
It may add an additional cost for pure routing workloads that
reduces overall throughput, in such case you should disable it.
Default: 1
+tcp_early_demux - BOOLEAN
+ Enable early demux for established TCP sockets.
+ Default: 1
+
+udp_early_demux - BOOLEAN
+ Enable early demux for connected UDP sockets. Disable this if
+ your system could experience more unconnected load.
+ Default: 1
+
icmp_echo_ignore_all - BOOLEAN
If set non-zero, then the kernel will ignore all ICMP ECHO
requests sent to it.
@@ -1458,11 +1478,20 @@ accept_ra_pinfo - BOOLEAN
Functional default: enabled if accept_ra is enabled.
disabled if accept_ra is disabled.
+accept_ra_rt_info_min_plen - INTEGER
+ Minimum prefix length of Route Information in RA.
+
+ Route Information w/ prefix smaller than this variable shall
+ be ignored.
+
+ Functional default: 0 if accept_ra_rtr_pref is enabled.
+ -1 if accept_ra_rtr_pref is disabled.
+
accept_ra_rt_info_max_plen - INTEGER
Maximum prefix length of Route Information in RA.
- Route Information w/ prefix larger than or equal to this
- variable shall be ignored.
+ Route Information w/ prefix larger than this variable shall
+ be ignored.
Functional default: 0 if accept_ra_rtr_pref is enabled.
-1 if accept_ra_rtr_pref is disabled.