forked from luck/tmp_suning_uos_patched
35 lines
1.4 KiB
Plaintext
35 lines
1.4 KiB
Plaintext
|
|
||
|
|
There are a few network parameters that can be tuned to better match
|
||
|
|
the kernel to your system hardware and intended usage. The defaults
|
||
|
|
are usually a good choice for 99% of the people 99% of the time, but
|
||
|
|
you should be aware they do exist and can be changed.
|
||
|
|
|
||
|
|
The current list of parameters can be found in the files:
|
||
|
|
|
||
|
|
linux/net/TUNABLE
|
||
|
|
Documentation/networking/ip-sysctl.txt
|
||
|
|
|
||
|
|
Some of these are accessible via the sysctl interface, and many more are
|
||
|
|
scheduled to be added in this way. For example, some parameters related
|
||
|
|
to Address Resolution Protocol (ARP) are very easily viewed and altered.
|
||
|
|
|
||
|
|
# cat /proc/sys/net/ipv4/arp_timeout
|
||
|
|
6000
|
||
|
|
# echo 7000 > /proc/sys/net/ipv4/arp_timeout
|
||
|
|
# cat /proc/sys/net/ipv4/arp_timeout
|
||
|
|
7000
|
||
|
|
|
||
|
|
Others are already accessible via the related user space programs.
|
||
|
|
For example, MAX_WINDOW has a default of 32 k which is a good choice for
|
||
|
|
modern hardware, but if you have a slow (8 bit) Ethernet card and/or a slow
|
||
|
|
machine, then this will be far too big for the card to keep up with fast
|
||
|
|
machines transmitting on the same net, resulting in overruns and receive errors.
|
||
|
|
A value of about 4 k would be more appropriate, which can be set via:
|
||
|
|
|
||
|
|
# route add -net 192.168.3.0 window 4096
|
||
|
|
|
||
|
|
The remainder of these can only be presently changed by altering a #define
|
||
|
|
in the related header file. This means an edit and recompile cycle.
|
||
|
|
|
||
|
|
Paul Gortmaker 06/96
|