sys_attrs_net(5)sys_attrs_net(5)NAMEsys_attrs_net - net subsystem attributes
DESCRIPTION
This reference page lists and describes attributes for the Network
(net) kernel subsystem. Refer to the sys_attrs(5) reference page for an
introduction to the topic of kernel subsystem attributes.
Number of seconds until the system deletes a complete ARP entry
from the ARP cache.
Default value: 1200 (seconds)
Minimum value: 1
Maximum value: 32767
Number of seconds until the system deletes an incomplete ARP
entry from the ARP cache.
Default value: 180 (seconds)
Minimum value: 1
Maximum value: 32767
Number of seconds until the system refreshes a complete ARP
entry in the ARP cache.
Default value: 120 (seconds)
Minimum value: 1
Maximum value: 32767
A value that specifies whether the initial ARP refresh packet is
unicast (1) or broadcast (0). It is best to leave this parameter
at the default setting, because it minimizes the amount of
broadcast traffic on the network. However, some vendors' network
switches will occasionally drop unicast ARP packets; in this
case, the behavior should be changed to broadcast (0).
Default value: 1 (unicast)
Enables (1) or disables (0) traffic control on all network
interfaces on the system.
Default value: 0 (disabled)
Minimum value: 0
Maximum value: 1
Maximum number of mbufs enqueued on an interface's output queue
before packets are dropped.
Default value: 1024 (bytes)
Minimum value: 1024
Maximum value: 65535
The default maximum transmission unit (MTU) for all loopback
(lo) interfaces.
Default value: 4096 (bytes)
Minimum value: 68
Maximum value: 65535
Maximum number of loopback (lo) interfaces on a system. The
interfaces are numbered sequentially starting with 0 (for exam‐
ple, lo0).
Default value: 1 (interface)
Minimum value: 1
Maximum value: 16581375 (or until memory is exhausted)
Enables (1) or disables (0) fair allocation of netisr protocol
threads. When enabled (1), only 1 netisr thread runs for each
protocol queue.
Default value: 1 (enabled)
Minimum value: 0
Maximum value: 1
The priority of the netisr protocol threads.
Default value: 33
Minimum value: 0
Maximum value: 63
Number of network threads configured in a system.
Default value: n (Based on the number of CPUs in a system. For
a system with one processor, the value is 1. For a multipro‐
cessing system, the value is 1 plus the number of processors.)
Minimum value: 1
Maximum value: 50
Number of packets (packet threshold) above which another netisr
thread is started.
Default value: 1 (packet)
Minimum value: 1
Maximum value: INT_MAX, or 2 billion
Number of packet filter devices on a system.
Default value: 256 (devices), if PACKETFILTER option is config‐
ured in the kernel; otherwise, 0
Minimum value: 256
Maximum value: 4096
Number of serial line internet protocol (SLIP) lines.
Default value: 1 (line)
Minimum value: 1
Maximum value: 50
Enables (1) or disables (0) the looping back of output packets
written by the packet filter.
Default value: 1 (enabled)
Minimum value: 0
Maximum value: 1
Enables (1) or disables (0) the supplying of a source Media
Access Control (MAC) address by the packet filter on all outgo‐
ing packets.
Default value: 1 (enabled)
Minimum value: 0
Maximum value: 1
Specifies the maximum speed for TCP traffic for any route cre‐
ated on the system.
Default value: 0 (bits per 200 milliseconds)
Minimum value: 0
Maximum value: UINT_MAX, or 4 billion
Depth of the kernel cache used by the screend facility.
Default value: 8 (entries)
Minimum value: 8
Maximum value: 16
Width of the kernel cache used by the screend facility.
Default value: 8 (entries)
Minimum value: 8
Maximum value: 4096
Maximum number of packets pending allowed in the screend facil‐
ity queue.
Default value: 32 (packets)
Minimum value: 32
Maximum value: 16384
SEE ALSOsys_attrs(5)
System Configuration and Tuning
sys_attrs_net(5)
