sys_attrs_net(5) — Macro Packages and Conventions
NAME
sys_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.
arpkillc
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
arpkilli
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
arprefresh
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
arpunicast
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)
ether_cl_scheduler
Enables (1) or disables (0) traffic control on all network interfaces on the system.
Default value: 0 (disabled)
Minimum value: 0
Maximum value: 1
ifqmaxlen
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
lo_def_ip_mtu
The default maximum transmission unit (MTU) for all loopback (lo) interfaces.
Default value: 4096 (bytes)
Minimum value: 68
Maximum value: 65535
lodevs
Maximum number of loopback (lo) interfaces on a system. The interfaces are numbered sequentially starting with 0 (for example, lo0).
Default value: 1 (interface)
Minimum value: 1
Maximum value: 16581375 (or until memory is exhausted)
netisrfair
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
netisrpriority
The priority of the netisr protocol threads.
Default value: 33
Minimum value: 0
Maximum value: 63
netisrthreads
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 multiprocessing system, the value is 1 plus the number of processors.)
Minimum value: 1
Maximum value: 50
netisrwakeupthreshold
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
npacketfilter
Number of packet filter devices on a system.
Default value: 256 (devices), if PACKETFILTER option is configured in the kernel; otherwise, 0
Minimum value: 256
Maximum value: 4096
nslip
Number of serial line internet protocol (SLIP) lines.
Default value: 1 (line)
Minimum value: 1
Maximum value: 50
screen_cachedepth
Depth of the kernel cache used by the screend facility.
Default value: 8 (entries)
Minimum value: 8
Maximum value: 16
screen_cachewidth
Width of the kernel cache used by the screend facility.
Default value: 8 (entries)
Minimum value: 8
Maximum value: 4096
screen_maxpend
Maximum number of packets pending allowed in the screend facility queue.
Default value: 32 (packets)
Minimum value: 32
Maximum value: 16384
SEE ALSO
System Configuration and Tuning