diff options
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 45 |
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. |