diff options
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index dc2dc87d255..17953e2bc3e 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -29,7 +29,7 @@ route/max_size - INTEGER neigh/default/gc_thresh1 - INTEGER Minimum number of entries to keep. Garbage collector will not purge entries if there are fewer than this number. - Default: 256 + Default: 128 neigh/default/gc_thresh3 - INTEGER Maximum number of neighbor entries allowed. Increase this @@ -175,14 +175,6 @@ tcp_congestion_control - STRING is inherited. [see setsockopt(listenfd, SOL_TCP, TCP_CONGESTION, "name" ...) ] -tcp_cookie_size - INTEGER - Default size of TCP Cookie Transactions (TCPCT) option, that may be - overridden on a per socket basis by the TCPCT socket option. - Values greater than the maximum (16) are interpreted as the maximum. - Values greater than zero and less than the minimum (8) are interpreted - as the minimum. Odd values are interpreted as the next even value. - Default: 0 (off). - tcp_dsack - BOOLEAN Allows TCP to send "duplicate" SACKs. @@ -190,7 +182,9 @@ tcp_early_retrans - INTEGER Enable Early Retransmit (ER), per RFC 5827. ER lowers the threshold for triggering fast retransmit when the amount of outstanding data is small and when no previously unsent data can be transmitted (such - that limited transmit could be used). + that limited transmit could be used). Also controls the use of + Tail loss probe (TLP) that converts RTOs occuring due to tail + losses into fast recovery (draft-dukkipati-tcpm-tcp-loss-probe-01). Possible values: 0 disables ER 1 enables ER @@ -198,7 +192,9 @@ tcp_early_retrans - INTEGER by a fourth of RTT. This mitigates connection falsely recovers when network has a small degree of reordering (less than 3 packets). - Default: 2 + 3 enables delayed ER and TLP. + 4 enables TLP only. + Default: 3 tcp_ecn - INTEGER Control use of Explicit Congestion Notification (ECN) by TCP. |