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-rw-r--r--Documentation/networking/ip-sysctl.txt29
1 files changed, 17 insertions, 12 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 974ab47ae53a..b3345d0fe0a6 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -109,7 +109,10 @@ neigh/default/unres_qlen_bytes - INTEGER
queued for each unresolved address by other network layers.
(added in linux 3.3)
Setting negative value is meaningless and will return error.
- Default: 65536 Bytes(64KB)
+ Default: SK_WMEM_MAX, (same as net.core.wmem_default).
+ Exact value depends on architecture and kernel options,
+ but should be enough to allow queuing 256 packets
+ of medium size.
neigh/default/unres_qlen - INTEGER
The maximum number of packets which may be queued for each
@@ -119,7 +122,7 @@ neigh/default/unres_qlen - INTEGER
unexpected packet loss. The current default value is calculated
according to default value of unres_qlen_bytes and true size of
packet.
- Default: 31
+ Default: 101
mtu_expires - INTEGER
Time, in seconds, that cached PMTU information is kept.
@@ -353,12 +356,7 @@ tcp_l3mdev_accept - BOOLEAN
compiled with CONFIG_NET_L3_MASTER_DEV.
tcp_low_latency - BOOLEAN
- If set, the TCP stack makes decisions that prefer lower
- latency as opposed to higher throughput. By default, this
- option is not set meaning that higher throughput is preferred.
- An example of an application where this default should be
- changed would be a Beowulf compute cluster.
- Default: 0
+ This is a legacy option, it has no effect anymore.
tcp_max_orphans - INTEGER
Maximal number of TCP sockets not attached to any user file handle,
@@ -1291,8 +1289,7 @@ tag - INTEGER
xfrm4_gc_thresh - INTEGER
The threshold at which we will start garbage collecting for IPv4
destination cache entries. At twice this value the system will
- refuse new allocations. The value must be set below the flowcache
- limit (4096 * number of online cpus) to take effect.
+ refuse new allocations.
igmp_link_local_mcast_reports - BOOLEAN
Enable IGMP reports for link local multicast groups in the
@@ -1356,6 +1353,15 @@ flowlabel_state_ranges - BOOLEAN
FALSE: disabled
Default: true
+flowlabel_reflect - BOOLEAN
+ Automatically reflect the flow label. Needed for Path MTU
+ Discovery to work with Equal Cost Multipath Routing in anycast
+ environments. See RFC 7690 and:
+ https://tools.ietf.org/html/draft-wang-6man-flow-label-reflection-01
+ TRUE: enabled
+ FALSE: disabled
+ Default: FALSE
+
anycast_src_echo_reply - BOOLEAN
Controls the use of anycast addresses as source addresses for ICMPv6
echo reply
@@ -1778,8 +1784,7 @@ ratelimit - INTEGER
xfrm6_gc_thresh - INTEGER
The threshold at which we will start garbage collecting for IPv6
destination cache entries. At twice this value the system will
- refuse new allocations. The value must be set below the flowcache
- limit (4096 * number of online cpus) to take effect.
+ refuse new allocations.
IPv6 Update by: