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-rw-r--r--Documentation/networking/ip-sysctl.txt40
1 files changed, 32 insertions, 8 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index caedb18d4564..0307e2875f21 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -65,6 +65,12 @@ neigh/default/gc_thresh1 - INTEGER
purge entries if there are fewer than this number.
Default: 128
+neigh/default/gc_thresh2 - INTEGER
+ Threshold when garbage collector becomes more aggressive about
+ purging entries. Entries older than 5 seconds will be cleared
+ when over this number.
+ Default: 512
+
neigh/default/gc_thresh3 - INTEGER
Maximum number of neighbor entries allowed. Increase this
when using large numbers of interfaces and when communicating
@@ -757,8 +763,21 @@ icmp_ratelimit - INTEGER
icmp_ratemask (see below) to specific targets.
0 to disable any limiting,
otherwise the minimal space between responses in milliseconds.
+ Note that another sysctl, icmp_msgs_per_sec limits the number
+ of ICMP packets sent on all targets.
+ Default: 1000
+
+icmp_msgs_per_sec - INTEGER
+ Limit maximal number of ICMP packets sent per second from this host.
+ Only messages whose type matches icmp_ratemask (see below) are
+ controlled by this limit.
Default: 1000
+icmp_msgs_burst - INTEGER
+ icmp_msgs_per_sec controls number of ICMP packets sent per second,
+ while icmp_msgs_burst controls the burst size of these packets.
+ Default: 50
+
icmp_ratemask - INTEGER
Mask made of ICMP types for which rates are being limited.
Significant bits: IHGFEDCBA9876543210
@@ -832,6 +851,11 @@ igmp_max_memberships - INTEGER
conf/all/* is special, changes the settings for all interfaces
+igmp_qrv - INTEGER
+ Controls the IGMP query robustness variable (see RFC2236 8.1).
+ Default: 2 (as specified by RFC2236 8.1)
+ Minimum: 1 (as specified by RFC6636 4.5)
+
log_martians - BOOLEAN
Log packets with impossible addresses to kernel log.
log_martians for the interface will be enabled if at least one of
@@ -935,14 +959,9 @@ accept_source_route - BOOLEAN
FALSE (host)
accept_local - BOOLEAN
- Accept packets with local source addresses. In combination
- with suitable routing, this can be used to direct packets
- between two local interfaces over the wire and have them
- accepted properly.
-
- rp_filter must be set to a non-zero value in order for
- accept_local to have an effect.
-
+ Accept packets with local source addresses. In combination with
+ suitable routing, this can be used to direct packets between two
+ local interfaces over the wire and have them accepted properly.
default FALSE
route_localnet - BOOLEAN
@@ -1140,6 +1159,11 @@ anycast_src_echo_reply - BOOLEAN
FALSE: disabled
Default: FALSE
+mld_qrv - INTEGER
+ Controls the MLD query robustness variable (see RFC3810 9.1).
+ Default: 2 (as specified by RFC3810 9.1)
+ Minimum: 1 (as specified by RFC6636 4.5)
+
IPv6 Fragmentation:
ip6frag_high_thresh - INTEGER